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Journal articles on the topic 'Bundle of tubes'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Honda, H., B. Uchima, S. Nozu, E. Torigoe, and S. Imai. "Film Condensation of R-113 on Staggered Bundles of Horizontal Finned Tubes." Journal of Heat Transfer 114, no. 2 (1992): 442–49. http://dx.doi.org/10.1115/1.2911293.

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Film condensation of R-113 on staggered bundles of horizontal finned tubes with vertical vapor downflow was experimentally investigated. Two tubes with flat-sided annular fins and four tubes with three-dimensional fins were tested. The condensate flow and heat transfer characteristics were compared with the previous results for in-line bundles of the same test tubes and a staggered bundle of smooth tubes. The decrease in heat transfer due to condensate inundation was most significant for the in-line bundles of the three-dimensional fin tubes, whereas the decrease was very slow for both the sta

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2

Deeb, Rawad. "Effect of angle of attack on heat transfer and hydrodynamic characteristics for staggered drop-shaped tubes bundle in cross-flow." Proceedings of the Russian higher school Academy of sciences, no. 3 (December 18, 2020): 21–36. http://dx.doi.org/10.17212/1727-2769-2020-3-21-36.

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Tube bundles can be used as a separation heat exchanger in the organic Rankine cycle power plants (ORC), while the hot gas passes over the outer surface, and the working substance ORC flows inside the tubes. A numerical study has been conducted to clarify heat transfer and hydrodynamics of a cross-flow heat exchanger with staggered drop-shaped tubes at different flow angles of attack in comparison with circular tubes of the same equivalent diameter. The study was performed for the Reynolds number Re= 1.8  103 ~ 9.4  103, the longitudinal and transverse spacing of the tubes in the bundle are

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3

Chan, A. M. C., and M. Shoukri. "Boiling Characteristics of Small Multitube Bundles." Journal of Heat Transfer 109, no. 3 (1987): 753–60. http://dx.doi.org/10.1115/1.3248154.

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Boiling characteristics of multitube bundles have been investigated experimentally. Small bundles of up to nine rows were used. Void fraction profiles in the test vessel, tube surface temperatures, power input to individual tubes, and critical heat fluxes were measured for different bundle arrangements and boiling conditions. The data were used to study the system hydrodynamics, bundle heat transfer coefficients, and bundle critical heat flux. The data showed that for lower heat fluxes, the heat transfer characteristics are affected by the system hydrodynamics resulting in higher heat transfer

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4

Honda, H., B. Uchima, S. Nozu, H. Nakata, and E. Torigoe. "Film Condensation of R-113 on In-Line Bundles of Horizontal Finned Tubes." Journal of Heat Transfer 113, no. 2 (1991): 479–86. http://dx.doi.org/10.1115/1.2910586.

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Film condensation of R-113 on in-line bundles of horizontal finned tubes with vertical vapor downflow was experimentally investigated. Two tubes with flat-sided annular fins and four tubes with three-dimensional fins were tested. The test sections were 3×15 tube bundles with and without two rows of inundation tubes at the top. Heat transfer measurements were carried out on a row-by-row basis. The heat transfer enhancement due to vapor shear was much less for a finned tube bundle than for a smooth tube bundle. The decrease in heat transfer due to condensate inundation was more marked for a thre

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5

Deeb, Rawad. "Flow and heat transfer characteristics of staggered mixed circular and drop-shaped tube bundle." Physics of Fluids 34, no. 6 (2022): 065126. http://dx.doi.org/10.1063/5.0090732.

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The purpose of this study is to clarify heat transfer and fluid flow behavior across six-row mixed tube bundles. The tube bundle consists of circular and drop-shaped cross sections in a staggered arrangement. The Reynolds number Re for the flow is varied from 1.78 × 103 to 18.72 × 103. Six cases of the mixed tube bundle were considered. The results of the mixed tube bundles were compared with those of the circular (case I) and drop-shaped ones (case II). The Ansys Fluent software package was utilized to predict the flow pattern over the tube bundles. The results of the numerical simulation sho

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6

Blevins, R. D., and M. M. Bressler. "Acoustic Resonance in Heat Exchanger Tube Bundles—Part I: Physical Nature of the Phenomenon." Journal of Pressure Vessel Technology 109, no. 3 (1987): 275–81. http://dx.doi.org/10.1115/1.3264863.

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The intense acoustic resonance resulting from gas flow across a bank of heat exchanger tubes in a duct has been investigated experimentally and theoretically. At low gas velocities, the acoustic tone emanating from tube bundles increases in proportion to the flow velocity. When the frequency approaches a bound acoustic transverse mode of the tube bundle, intense sound can result. Sound levels as high as 173 db were measured within the bundle. During resonance, the sound correlates vortex shedding from the tubes and the pressure drop increases in some bundles.

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7

Wu, Zhiwei, and Caifu Qian. "Study on Behavior of the Heat Exchanger with Conically-Corrugated Tubes and HDD Baffles." ChemEngineering 6, no. 1 (2022): 1. http://dx.doi.org/10.3390/chemengineering6010001.

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Baffles with holes in different diameters (or HDD baffles) and conically-corrugated tubes are respectively longitudinal flow baffle and high-efficiency heat exchange tubes proposed by the author. In this paper, vibrations of tube bundles with HDD baffles and fluid flow as well as heat transfer inside conically-corrugated tubes were numerically simulated, and the heat exchanger with conically-corrugated tubes and HDD baffles was tested for the heat transfer efficiency. It is found that compared with the traditional segmental baffles, tube bundle vibrations in heat exchangers, if using the HDD b

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8

Ivanov, S., and N. Pivovarenko. "NESTING OF THE RESIN BEE MEGACHILE (CALLOMEGACHILE) SCULPTURALIS SMITH, 1853 (HYMENOPTERA, APOIDEA, MEGACHILIDAE) IN FABRE HIVES. CHOISE OF A CAVITY FOR THE NEST." Ekosistemy, no. 39 (December 24, 2024): 155–66. https://doi.org/10.29039/2413-1733-2024-39-155-166.

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The article presents the results of an experimental study of the behavior of the resin bee Megachile sculpturalis Smith, 1853 inhabiting Fabre hives. The hives provided to the bees for colonization were made of segments of reed stalks (Phragmites australis) in the form of tubes, open on one side and closed on the other. The tubes were tied into bundles and inserted into the front wall of the hive or fixed to its sides. In addition, separate tubes were inserted into the front wall of the hive at different distances from each other. Female bees preferred to colonize tubes located on the front wa

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9

Choe, Yong Chol, Un Chol Han, and Jong Min Kim. "Influence of Initiation Modes in the Bundle-Series Initiation of a Large Number of Shock Tubes by Detonators." Shock and Vibration 2023 (June 20, 2023): 1–11. http://dx.doi.org/10.1155/2023/9915373.

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The bundle-series initiation is currently used as the method for simultaneously transmitting blast signals from a detonator to a large number of shock tubes for blasting using shock tubes and its initiation modes affect the ability and probability of signal transmission. A numerical study of the influence of initiation modes on the pressure impulse generated by detonators and transmitted to a large number of shock tubes has been undertaken with ANSYS AUTODYN code and validated through experimental results of signal transmission probability of shock tubes. Numerical simulations and experiments

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10

Ai, Shiqin, Chao Sun, Yuechan Liu, and Yuelin Li. "Numerical Simulation of Flow-Induced Vibration of Three-Dimensional Elastic Heat Exchanger Tube Bundle Based on Fluid-Structure Coupling." Shock and Vibration 2022 (January 12, 2022): 1–17. http://dx.doi.org/10.1155/2022/8980562.

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The reliability of the heat exchanger tube bundle not only affects the economic efficiency of production but also relates to the normal development of production safety and health. To study the flow-induced vibration of tube bundles, a three-dimensional finite element model of heat exchange tubes and watersheds inside and outside the tubes was established to explore the flow-induced vibration characteristics of tube bundles and analyze the natural frequencies of single-span and multispan heat exchange tubes. Considering the randomness of the effective support between the tube bundle and the su

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11

Memory, S. B., S. V. Chilman, and P. J. Marto. "Nucleate Pool Boiling of a TURBO-B Bundle in R-113." Journal of Heat Transfer 116, no. 3 (1994): 670–78. http://dx.doi.org/10.1115/1.2910921.

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Heat transfer measurements were made during nucleate boiling of R-113 from a bundle of 15 electrically heated, copper TURBO-B tubes arranged in an equilateral triangular pitch, designed to simulate a portion of a flooded evaporator. Five of the tubes that were oriented in a vertical array on the centerline of the bundle were each instrumented with six wall thermocouples. For increasing heat flux, the incipient boiling wall superheat of upper tubes decreased as lower tubes were activated. In the boiling region at low heat fluxes (≈ 1 kW/m2), the average bundle heat transfer coefficient was 4.6

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12

Taylor, C. E., I. G. Currie, M. J. Pettigrew, and B. S. Kim. "Vibration of Tube Bundles in Two-Phase Cross-Flow: Part 3—Turbulence-Induced Excitation." Journal of Pressure Vessel Technology 111, no. 4 (1989): 488–500. http://dx.doi.org/10.1115/1.3265707.

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An extensive experimental program was carried out to study the vibration behavior of tube bundles subjected to two-phase cross-flow. Turbulence-induced excitation is discussed in Part 3 of this series of three papers. Random vibration response to turbulence-induced excitation is a significant vibration mechanism in heat exchanger tube bundles subjected to two-phase cross-flow. The vibration responses of centrally located tubes in four tube bundle configurations subjected to air-water cross-flow was measured. The results are presented in the form of a normalized forced-excitation spectrum which

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13

Sadikin, Azmahani, and Norasikin Mat Isa. "Flow Separation Prediction in a Single-Phase Flow in an Inline Tube Bundles." Applied Mechanics and Materials 465-466 (December 2013): 608–12. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.608.

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The vertical single-phase flow was studied on the shell side of a horizontal tube bundle. In the present study, CFX version 14.0 from ANSYS was used to predict the flow regimes in the two tube bundles; i.e. the 19 mm and 38 mm arranged in an in-line configuration with a pitch to diameter ratio of 1.32. The simulations were undertaken to inform on how the fluid flowed within the tube passages in different tube bundle diameter that gives different gaps between the tubes, where the fluid must pass. The results show that the maximum gaps between the tubes have no clear effect to the flow where the

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14

Zhang, Shujuan, Chunbo Wang, Min Xie, Jinyu Liu, Zhe Kong, and Hui Su. "Actin Bundles in The Pollen Tube." International Journal of Molecular Sciences 19, no. 12 (2018): 3710. http://dx.doi.org/10.3390/ijms19123710.

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The angiosperm pollen tube delivers two sperm cells into the embryo sac through a unique growth strategy, named tip growth, to accomplish fertilization. A great deal of experiments have demonstrated that actin bundles play a pivotal role in pollen tube tip growth. There are two distinct actin bundle populations in pollen tubes: the long, rather thick actin bundles in the shank and the short, highly dynamic bundles near the apex. With the development of imaging techniques over the last decade, great breakthroughs have been made in understanding the function of actin bundles in pollen tubes, esp

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15

Fabrykiewicz, Maciej, and Janusz T. Cieśliński. "Effect of Tube Bundle Arrangement on the Performance of PCM Heat Storage Units." Energies 15, no. 24 (2022): 9343. http://dx.doi.org/10.3390/en15249343.

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The results of a comprehensive study on the charging and discharging of latent heat storage systems (LHSS) are presented. Multi-tube shell-and-tube units with variable layouts of tube bundles are examined. Two tube arrangements—in-line and staggered—are tested. A variable number of tubes and different tube positions in a bundle are investigated. Moreover, two pitch ratios are studied. Three commercially available substances are used as phase change materials (PCM). The results show that increasing the number of tubes reduces both the charging and discharging times. It is found that for a bundl

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16

Gylys, J., M. Jakubcionis, S. Sinkunas, and T. Zdankus. "AVERAGE HEAT TRANSFER OF TUBES IN DOWNWARD FOAM FLOW." Revista de Engenharia Térmica 2, no. 1 (2003): 38. http://dx.doi.org/10.5380/reterm.v2i1.3518.

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The model of heat exchanger was investigated experimentally. This model consists of three vertical lines of horizontal tubes with five tubes in each. Tubes were arranged in a staggered order. Heat transfer of staggered bundle of tubes to downward static stable foam flow was investigated experimentally. Heat transfer dependence on specific gas and liquid velocity was determined. Dependence of volumetric void fraction of foam on heat transfer was investigated also. Heat transfer rate dependence on tube position in the line of tube bundle was investigated experimentally. It was established that h

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17

Khalatov, А. А., І. І. Borisov, G. Kovalenko, and M. Muliarchuk. "APPLICATION OF DIMPLES AND HELICAL GROOVES ON THE OUTTER SURFACE OF TUBES TO INCREASE THERMAL-HYDRAULIC EFFICIENCY OF TUBE BUNDLES AT CROSS FLOW." Thermophysics and Thermal Power Engineering 46, no. 3 (2022): 16–22. http://dx.doi.org/10.31472/ttpe.3.2022.11.

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The flow structure and thermo-hydraulic efficiency of cross flow of tube bundles with dimples and helical grooves have been analyzed. The Reynolds number range (103-104) was typical for industrial heat exсhangers. It was found that dimples and grooves decrease scientifically the cylinder wake area and reduces the hydraulic losses. The heat transfer augmentation in five-row tube bundle by dimples is 35-40% while pressure drop increase by 10-15%. The hydraulic resistance of two-row bundle of tube with helical grooves is 20% lower than that of a smooth tube bundle, while heat transfer augmentatio

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18

Gorobets, Valery, Yurii Bohdan, Viktor Trokhaniak, Ievgen Antypov, and Mykola Masiuk. "Summarizing of Nusselt numbers and Euler numbers in depending of Reynoldsnumber for the compact tube bundle of small diameter tubes by experimental and numerical methods of researches." E3S Web of Conferences 128 (2019): 04002. http://dx.doi.org/10.1051/e3sconf/201912804002.

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The work reports on the experimental research on the determination of the number of Nusselt concerning the compact bundle of small diameter smooth tubes. Having an inline arrangement, it lacks the gapsbetween adjacent tubes of longitudinal rows. In comparison to the traditional inline arrangement, this type of bundle is noticed to have significant advantages such as an increased coefficient of heat transfer and reduced aerodynamic resistance of the tube bundle. At the same time, the use of the compact bundle of small diameter smooth tubes leads to the beneficial reduction of the size and mass

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19

Zhang, Xu, Bin Jiang, Luhong Zhang, and Xiaoming Xiao. "Fluid-Elastic Instability Tests on Parallel Triangular Tube Bundles with Different Mass Ratio Values under Increasing and Decreasing Flow Velocities." Shock and Vibration 2016 (2016): 1–20. http://dx.doi.org/10.1155/2016/1680218.

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To study the effects of increasing and decreasing flow velocities on the fluid-elastic instability of tube bundles, the responses of an elastically mounted tube in a rigid parallel triangular tube bundle with a pitch-to-diameter ratio of 1.67 were tested in a water tunnel subjected to crossflow. Aluminum and stainless steel tubes were tested, respectively. In the in-line and transverse directions, the amplitudes, power spectrum density functions, response frequencies, added mass coefficients, and other results were obtained and compared. Results show that the nonlinear hysteresis phenomenon oc

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20

Marto, P. J., and C. L. Anderson. "Nucleate Boiling Characteristics of R-113 in a Small Tube Bundle." Journal of Heat Transfer 114, no. 2 (1992): 425–33. http://dx.doi.org/10.1115/1.2911291.

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Heat transfer measurements were made during nucleate boiling of R-113 from a bundle of 15 electrically heated, smooth copper tubes arranged in an equilateral triangular pitch. The bundle was designed to simulate a portion of a refrigeration system flooded-tube evaporator. The outside diameter of the tubes was 15.9 mm, and the tube pitch was 19.1 mm. Five of the tubes that were oriented in a vertical array on the centerline of the bundle were each instrumented with six wall thermocouples to obtain an average wall temperature and a resultant average heat transfer coefficient. All tests were perf

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21

Kim, Jeongnam, Jiannan Zhang, Azamatjon Kakhramon ugli Malikov, and Younho Cho. "A Study on the Development of the Stainless Steel Tube Bundle Structure Detecting System Using Ultrasonic Guided Wave." Sensors 24, no. 16 (2024): 5278. http://dx.doi.org/10.3390/s24165278.

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In this study, an ultrasonic guided wave system that can be used to detect broken tubes in stainless steel tube bundle structures (e.g., heat exchangers) with fairly narrow spacing between the tubes was designed. The interval between the tubes was 1.5 mm, and the thickness of the strip with a transducer that can be inspected by passing between the tubes was designed to be 1 mm. The damaged specimen was filled with water, and it was confirmed that the signal amplitude was smaller than that of the normal specimen filled with air. The ultrasonic properties of stainless steel were analyzed using t

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22

Rajput, Kishore Shankarsinh, and Vidya Shivram Patil. "Structure and development of cortical bundles in Couroupita guianensis Aubl. (Lecythidaceae)." Anales de Biología, no. 38 (June 27, 2016): 95–102. http://dx.doi.org/10.6018/analesbio.38.10.

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El desarrollo de haces corticales, en ramas y pedúnculos de Couroupita guianensis (Lecythidaceae), comienza cerca del meristemo apical concomitante con los haces vasculares normales. Cada haz cortical llega a estar rodeado por una vaina de fibras que, a menudo, mostraba la presencia de una capa gelatinosa (fibras G). A medida que avanza el crecimiento, cada haz se puede dividir en dos o tres haces. Algunos de los haces son mayores y muestran elementos vasculares bien diferenciados debido a su asociación con frutos en desarrollo, mientras que los más pequeños, con pocos vasos, pueden ser trazas

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23

Akhtar, Muhammad Moin, and Javaria Qadeer. "Experimental Analysis of Flow Induced Vibrations in Heat Exchanger Tube Bundles with P/D of 1.54 Subjected to Crossflow." International Conference on Applied Engineering and Natural Sciences 1, no. 1 (2023): 108–13. http://dx.doi.org/10.59287/icaens.975.

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This paper presents an experimental analysis of flow-induced vibrations in a heat exchanger tube bundle subjected to crossflow. The study focuses on the characterization and insights gained from the investigation. The tube bundle configuration consists of plain tubes with a single flexible tube, arranged in a squared pattern. The primary objective is to assess the flow-induced vibration behavior and identify any potential instabilities within the system. To analyze the flow-induced vibrations, various parameters were considered, including the P/D ratio (tube pitch to tube diameter ratio), whic

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24

Djordjevic, Milena, R. Cerovic, D. Nikolic, and Sanja Radicevic. "Unusual behavior of growing pollen tubes in the ovary of plum culture (Prunus domestica L.)." Archives of Biological Sciences 62, no. 1 (2010): 137–42. http://dx.doi.org/10.2298/abs1001137d.

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Unusual behavior of growing pollen tubes in different combinations of pollination was observed in the ovary of the plum (Prunus domestica L.) cv 'Cacanska Lepotica'. It primarily refers to several issues, i.e. the curling up of pollen tubes within the micropyle, the growth of two pollen tubes into the nucellus of an ovule, the occurrence of a bundle above the nucellar cap and fluorescence of the part of the embryo sac containing the egg apparatus. Upon the growth of pollen tubes into the nucellus of the ovule, subsequently penetrating pollen tubes form a bundle either above the micropyle entra

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25

Sukhotski, A. B., and V. B. Kuntysh. "The Influence of Technological Factors of the Bimetallic Ribbed Tube Manufacturing Process on the Heat Transfer Rate of Air-Cooling Units." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 68, no. 2 (2025): 140–53. https://doi.org/10.21122/1029-7448-2026-68-2-140-153.

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The article presents an experimental study of the dependence of the heat transfer rate of a six-row staggered bundle made of bimetallic ribbed tubes on the technological factors of manufacturing a cold-rolled ribbed aluminum shell on a supporting tube. The bundle was installed in a wind tunnel and washed by a forced perpendicular air flow. To measure heat transfer, a local thermal modeling method was applied using an electrode calorimeter tube of a fluidized type installed in the middle of the third and fifth transverse rows of the bundle. The experimental data were presented in the form of de

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26

Belghazi, M., A. Bontemps, and C. Marvillet. "Condensation Heat Transfer on Enhanced Surface Tubes: Experimental Results and Predictive Theory." Journal of Heat Transfer 124, no. 4 (2002): 754–61. http://dx.doi.org/10.1115/1.1459728.

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Condensation heat transfer in a bundle of horizontal enhanced surface copper tubes (Gewa C+ tubes) has been experimentally investigated, and a comparison with trapezoidal shaped fin tubes with several fin spacing has been made. These tubes have a specific surface three-dimensional geometry (notched fins) and the fluids used are either pure refrigerant (HFC134a) or binary mixtures of refrigerants (HFC23/HFC134a). For the pure fluid and a Gewa C+ single tube, the results were analyzed with a specifically developed model, taking into account both gravity and surface tension effects. For the bundl

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27

Sukhotski, A. B., and Е. S. Danil’chik. "Convective Heat Exchange of Single-Row Bundles from Tubes with Rolled Aluminum Fins of Various Height at a Low Values of the Reynolds Number." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 64, no. 4 (2021): 336–48. http://dx.doi.org/10.21122/1029-7448-2021-64-4-336-348.

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The experimental study of the heat flow intensity of a single-row horizontal air-cooled tubular bundle of heat exchanger with spiral aluminum rolling fins at low Reynolds numbers (Re < 2000) is performed. The geometrical dimensions of the bimetallic finned tubes of the bundle, the following: the outer diameter of the fins d = 56.0 mm; the diameter of the tube at the base d0 = 26.8 mm; fin height h = 14.6 mm; pitch of fins s = 2.5 mm; the average fin thickness Δ = 0.5 mm; the coefficient of finned tubes φ = 19.3; heat transfer length l = 300 mm. The outer diameter of the load-bearing steel t

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28

Hayat, N., M. A. Rashid, and M. M. A. Bhutta. "Experimental Investigations of Vibrations Induced by Cross-flow in a Bundle of Tubes through Wind Tunnel." Nucleus 56, no. 1 (2019): 6–16. https://doi.org/10.71330/thenucleus.2019.538.

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Experimental investigations of vibrations induced by cross-flow in a tube bundle have been carried out in this research work. Vibration behavior of one tube in a bundle of tubes has been examined by placing it to a subsonic wind tunnel having cross-flowing air. The tube bundle consists of seven PVC tubes arranged in a rotated triangular configuration. The target tube is fitted with strain gauges to measure the amplitude response in flow and lateral directions for each value of the upstream velocity. Results show that surrounding tubes cause upstream flow which causes turbulence. Because of tha

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Liu, W., J. H. Davidson, and F. A. Kulacki. "Thermal Characterization of Prototypical Integral Collector Storage Systems With Immersed Heat Exchangers." Journal of Solar Energy Engineering 127, no. 1 (2005): 21–28. http://dx.doi.org/10.1115/1.1824106.

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Natural convection is measured in an enclosure that represents an integral collector storage system (ICS) with an immersed tube-bundle heat exchanger. Heat transfer coefficients for bundles of 240 tubes contained in a thin enclosure of aspect ratio of 9.3:1 and inclined at 30 deg to the horizontal are obtained for a range of transient operating modes and pitch-to-diameter ratios of 1.5, 2.4, and 3.3. Results for isothermal and stratified enclosures yield a correlation for the overall Nusselt number NuD=2.45±0.03RaD0.188,230⩽RaD⩽9800. The characteristic temperature difference in the Rayleigh nu

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Qadeer, Javaria, Muhammad Moin Akhtar, and Riffat Asim Pasha. "Fluid-elastic Instability Effect of Groove Cylinder in Heat Exchanger." International Conference on Applied Engineering and Natural Sciences 1, no. 1 (2023): 791–96. http://dx.doi.org/10.59287/icaens.1095.

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The fluidelastic instability impact of groove cylinders in heat exchangers are investigated in this study, and explores associated phenomena of flow-induced vibration and fluidelastic instability. The primary focus is on investigating the performance of various rows of tubes in the tube bundle, with a particular emphasis on the largest instability identified in the third row. The analysis also considers the impact of a triangular arrangement of tubes within the tube bundle. The addition of groove tubes in the heat exchanger proved to greatly delay the onset of fluidelastic instability, lowerin

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Ghalambaz, Mohammad, Amir Hossein Eisapour, Hayder I. Mohammed, et al. "Impact of Tube Bundle Placement on the Thermal Charging of a Latent Heat Storage Unit." Energies 14, no. 5 (2021): 1289. http://dx.doi.org/10.3390/en14051289.

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The melting process of a multi-tube’s thermal energy storage system in the existence of free convection effects is a non-linear and important problem. The placement of heated tubes could change the convective thermal circulation. In the present study, the impact of the position of seven heat exchanger tubes was systematically investigated. The energy charging process was numerically studied utilizing liquid fraction and stored energy with exhaustive temperature outlines. The tubes of heat transfer fluid were presumed in the unit with different locations. The unit’s heat transfer behavior was a

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Kracík, Petr, and Jiří Pospíšil. "Influence of Underpressure on Heat Transfer and Temperature Field at Sprinkled Tube Bundle." Applied Mechanics and Materials 832 (April 2016): 200–206. http://dx.doi.org/10.4028/www.scientific.net/amm.832.200.

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Sprinkled tube bundles with a thin liquid film flowing over them are used in various technology processes where it is necessary to separate the vapour and liquid phases quickly and efficiently at low temperatures with a corresponding decrease of pressure around the tube bundle. In ideal conditions water boils at the whole surface of an exchanger, but in practice it must be considered that in original spots of contact between water and the exchanger wall the water will not boil at the tubes' surface but the cooling liquid will merely be heated-up. The article focuses on these processes. Experim

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Kawamura, K., and A. Yasuo. "Turbulence-Induced Vibration of Tube Bundle in Cross and Parallel Jet Mixed Flow." Journal of Pressure Vessel Technology 111, no. 4 (1989): 352–60. http://dx.doi.org/10.1115/1.3265691.

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In the multi-tube type of heat exchanger, baffle plates are located at appropriate intervals to support the heat transfer tubes. Depending on the baffle plate type employed, the flow field in the tube bundle will consist of a mixture of the cross flow (the fluid flows at right angles to the tube bundle along the baffle plate surfaces) and the parallel jet flow (the fluid streams through channels such as the flow holes of the baffle plates in the form of jets and flows in parallel with the tube bundle). Vibrations induced by the flow can cause fretting wear and fatigue of the heat transfer tube

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34

Pavlenko, A. N., A. I. Kataev, and I. B. Mironova. "Heat transfer and irrigating liquid hydrodynamics on one-row vertical bundle of inclined tubes in falling film heat exchanger." E3S Web of Conferences 578 (2024): 01021. http://dx.doi.org/10.1051/e3sconf/202457801021.

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Spiral-wound heat exchangers widely used currently in various industries provide efficient heat transfer between media through spiral tube winds at evaporation and boiling of falling liquid film. The investigated bundle in the form of one-row vertical bundle of inclined tubes (5 degrees to the horizon) simulates a part of a spiral-wound heat exchanger. Heat transfer and hydrodynamics processes are studied at falling film irrigation by liquid R21 refrigerant at 3 bar of absolute pressure with water as heat carrier. The bundle is placed inside of rectangular heat exchanger with optical windows.

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Jian, Yinlin, Bin Dong, Shuyang Feng, Dangguo Yang, and Yue Li. "Analysis of vortex shedding characteristics and heat transfer performance of staggered tube bundle system." Thermal Science, no. 00 (2024): 228. http://dx.doi.org/10.2298/tsci240713228j.

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Tube bundle systems' heat transfer is unclear due to complex flow channels and turbulent fluctuations, affecting energy efficiency. This study simulates 2D staggered 18-row tube bundles at Reynolds numbers 3,100-50,000. 3D cylinders are simplified to 2D tubes, with grid independence and model validation. Flow, temperature fields, and synergy angles are analyzed for positions, Reynolds numbers, and spacings. High vortex shedding frequency in front tubes with multiple subfrequencies at different amplitudes. Asymmetric solutions emerge due to turbulent fluctuations. At high Reynolds, vortex shedd

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Jian, Yinlin, Bin Dong, Shuyang Feng, Dangguo Yang, and Yue Li. "Analysis of vortex shedding characteristics and heat transfer performance of staggered tube bundle system." Thermal Science, no. 00 (2025): 61. https://doi.org/10.2298/tsci241012061j.

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Tube bundle systems' heat transfer is unclear due to complex flow channels and turbulent fluctuations, affecting energy efficiency. This study simulates 2D staggered 18-row tube bundles at Reynolds numbers 3,100-50,000. 3D cylinders are simplified to 2D tubes, with grid independence and model validation. Flow, temperature fields, and synergy angles are analyzed for positions, Reynolds numbers, and spacings. High vortex shedding frequency in front tubes with multiple subfrequencies at different amplitudes. Asymmetric solutions emerge due to turbulent fluctuations. At high Reynolds, vortex shedd

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37

Yang, Guo-Xing, Yan-Zuo Chang, Yan-Xiao Jia, Jin-Ping Chen, Shao-Bi Dai, and Yu-Qiang Lin. "Simulation Study on Heat Transfer Conditions Based on Vertically Descending Evaporating Tubes." International Journal of Advanced Engineering Research and Science 11, no. 9 (2024): 33–42. http://dx.doi.org/10.22161/ijaers.119.5.

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This paper aims to investigate the heat transfer conditions of vertically descending evaporator tubes. Through numerical simulation methods, the flow patterns and heat transfer characteristics within the evaporator tubes under both uniform and abnormal heating conditions are analyzed. Fluent software is employed to simulate the normal evaporation process in uniformly heated evaporator tubes, exploring their gas circulation and local heat transfer conditions. Additionally, simulations are conducted for descending evaporator tubes under abnormal heating to analyze the impact of different heat di

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Petinrin, M. O., O. A. Towoju, S. A. Ajiboye, and O. E. Zebulun. "Numerical Study of the Effect of Changing Tube Pitches on Heat and Flow Characteristics from Tube Bundles in Cross Flow." Journal of Engineering Sciences 6, no. 2 (2019): e1-e10. http://dx.doi.org/10.21272/jes.2019.6(2).e1/.

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Tube bundles are found in various heat transfer equipment for thermal energy transfer between fluids. However, the inter-spatial arrangement of the tubes of any tube bundle is a determining factor for its thermal and hydraulic performance. In this paper, the effect of varying the transverse and longitudinal pitches downstream staggered circular tube bundle on the heat transfer and flow characteristic was numerically analyzed. Seven variations of tube arrangements were studied by changing the tube pitches within a Reynolds number range of 7 381 to 22 214. The analyses were carried out using the

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Gao, Weikai, Xiaoyang Xie, Xiaowei Li, and Xinxin Wu. "Influence of Coiling Direction of Helical Tube Bundles on the Thermal-Hydraulics of the HTGR Steam Generator." Journal of Physics: Conference Series 2048, no. 1 (2021): 012032. http://dx.doi.org/10.1088/1742-6596/2048/1/012032.

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Abstract Helical tube bundles were usually adopted in the steam generators (SGs) or intermediate heat exchangers (IHXs) of high temperature gas-cooled reactors (HTGRs). Heat transfer tubes in neighboring tube layers can be coiled in the same direction or in the opposite direction. The coiling direction has influences on the thermal-hydraulic performances of the SGs or IHXs. The cross flow convection over helical tube bundles with neighboring tube layers having the same coiled direction and opposite coiled direction were numerically investigated. Reynolds stress model with standard wall functio

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Lebedev, Oleg O. "Calculation study of an efficient screw-type steam condenser." Труды Санкт-Петербургского государственного морского технического университета 4, no. 1 (2025): 43–50. https://doi.org/10.52899/24141437_2025_01_43.

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BACKGROUND: The article examines steam condensation in a power plant condenser. The steam condenser is an indispensable cold source in the thermodynamic process of a power plant and the condenser is a large, metal-intensive component that determines the overall dimensions of the power plant. A new solution used to increase performance of a round steam condenser is the proposed design of a condenser tube bundle, a screw-type tube bundle for a steam condenser. Oval heat exchange tubes of the proposed bundle are helically twisted. METHODS: The article calculates a tube bundle for a steam condense

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Dymo, B.V., S.Y. Pastuhov, A.A. Epifanov, and S.N. Anastasenko. "Heat Transfer Modeling of Staggered Bundle with Round Tubes Screened by Mesh." Problemele Energeticii Regionale 1(30) (April 15, 2016): 69–77. https://doi.org/10.5281/zenodo.1208389.

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The article presents the results of CFD modeling of heat transfer and aerodynamic drag for the first three rows of cross-flowed staggered bundle consisting of round tubes screened by wire mesh. Geometric model of this bundle was developed. Selection of optimal parameters of the bundle finite element model realizes on the base of transition shear stress transport model. Two separate geometric models for even and odd rows of bundle have been elaborated for the scope of computational resources optimization. The results of numerical modeling of heat transfer for the first three rows of the bundle

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Pettigrew, M. J., J. H. Tromp, C. E. Taylor, and B. S. Kim. "Vibration of Tube Bundles in Two-Phase Cross-Flow: Part 2—Fluid-Elastic Instability." Journal of Pressure Vessel Technology 111, no. 4 (1989): 478–87. http://dx.doi.org/10.1115/1.3265706.

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An extensive experimental program was carried out to study the vibration behavior of tube bundles subjected to two-phase cross-flow. Fluid-elastic instability is discussed in Part 2 of this series of three papers. Four tube bundle configurations were subjected to increasing flow up to the onset of fluid-elastic instability. The tests were done on bundles with all-flexible tubes and on bundles with one flexible tube surrounded by rigid tubes. Fluid-elastic instabilities have been observed for all tube bundles and all flow conditions. The critical flow velocity for fluid-elastic instability is s

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Kistler, R. S., and J. M. Chenoweth. "Heat Exchanger Shellside Pressure Drop: Comparison of Predictions With Experimental Data." Journal of Heat Transfer 110, no. 1 (1988): 68–76. http://dx.doi.org/10.1115/1.3250475.

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A unique set of heat exchanger shellside pressure drop experimental data has become available from experiments at Argonne National Laboratory as a part of an ongoing research program in flow-induced vibration. These data provide overall pressure drop for a number of typical industrial heat exchanger configurations in addition to incremental pressure drop measurements along the shellside path. The test program systematically varied the baffle spacing, the tubefield pattern, and nozzle size for a series of isothermal water tests for segmentally baffled bundles. Also recently a comprehensive meth

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SAHRANE, Sara, and Slimane NIOU. "CFD Investigation of Shell and Tube Heat Exchanger: Impact of Various Tube Bundle Combinations on Heat Transfer Coefficient and Pressure Drop." Eurasia Proceedings of Science Technology Engineering and Mathematics 26 (December 30, 2023): 225–33. http://dx.doi.org/10.55549/epstem.1409489.

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Shell and tube heat exchangers play a crucial role in various industries, including chemical processing, oil and gas, power generation, and HVAC systems. These exchangers are widely used for transferring heat between two fluids while maintaining their separation. The design of a shell and tube heat exchanger consists of a bundle of tubes enclosed within a larger shell. The hot fluid flows through the tubes, while the cold fluid circulates around them in the shell, facilitating efficient heat transfer and pressure drop of the system. The performance of a shell and tube heat exchanger is influen

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Kracik, Petr, Marek Balas, Martin Lisy, and Jiri Pospisil. "Experimental Verification of Impact of Sprinkled Area Length on Heat Exchange Coefficient." Advances in Materials Science and Engineering 2019 (April 1, 2019): 1–7. http://dx.doi.org/10.1155/2019/9262438.

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On a sprinkled tube bundle, liquid forms a thin liquid film, and, in the case of boiling liquid, the liquid phase can be quickly and efficiently separated from the gas phase. There are several effects on the ideal flow mode and the heat transfer from the heating to the sprinkling liquid. The basic quantity is the flow rate of the sprinkling liquid, but also diameter of the tubes, pipe spacing of the tube bundle, and physical state of the sprinkling and heating fluid. Sprinkled heat exchangers are not a new technology and studies have been carried out all over the world. However, experiments (t

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Adom, Ebenezer, Peter Kew, and Keith Cornwell. "Boiling Heat Transfer on Small Diameter Tube Bundle." International Journal of Engineering Research in Africa 2 (June 2010): 41–52. http://dx.doi.org/10.4028/www.scientific.net/jera.2.41.

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An experimental study has been carried out using a tube bank representing a section of a tube bundle. The bank comprised 3 columns each of 10 stainless steel electrically heated tubes of 3mm outside diameter with pitch to diameter ratio of 1.5 in an in-line arrangement. Flow rate through the test section was controlled. Each tube in the central column was instrumented to permit determination of the tube temperature and heat flux, hence permitting calculation of the heat transfer coefficient. These tests were carried out using distilled water at nominal atmospheric pressure over a range of heat

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Adom, Ebenezer, Peter Kew, and Keith Cornwell. "Comparison of the Three–Zone Evaporation Model with Boiling Heat Transfer in a Compact Tube Bundle." International Journal of Engineering Research in Africa 5 (July 2011): 53–63. http://dx.doi.org/10.4028/www.scientific.net/jera.5.53.

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The recent interest in boiling heat transfer in small diameter tubes has led to the study of boiling heat transfer outside a compact tube bundle of diameter 3mm. The bank comprised 3 columns each of 10 stainless steel electrically heated tubes of 3mm outside diameter, with pitch to diameter ratio of 1.5 in an in-line arrangement. These tests were carried out using distilled water and R113 at nominal atmospheric pressure over a range of heat fluxes between 4-21 kW/m2 for mass fluxes from G=5.6 - 32.8 kg/m2s. The recent three-zone evaporation model developed by Thome, Dupont and Jacobi for boili

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Lian, H. Y., G. Noghrehkar, A. M. C. Chan, and M. Kawaji. "Effect of Void Fraction on Vibrational Behavior of Tubes in Tube Bundle Under Two-Phase Cross Flow." Journal of Vibration and Acoustics 119, no. 3 (1997): 457–63. http://dx.doi.org/10.1115/1.2889745.

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The effects of local two-phase flow parameters on the vibrational behavior of tubes have been studied in an in-line 5 × 20 tube bundle subjected to air-water cross-flow. One of the tubes was flexibly mounted and instrumented for vibration measurement and the others were rigid. Parameters obtained include local void fraction fluctuations, RMS amplitude of void fraction fluctuations, void fraction distributions across the tube bundle, flow regimes based on probability density function of void fraction signals, damping ratio, and tube vibration response as a function of mass flux, void fraction a

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Medeiros, M. S., and A. J. K. Leiroz. "A PROCEDURE FOR TUBE COUNT DETERMINATION IN SINGLE AND MULTIPLE PASS TUBULAR HEAT EXCHANGERS." Revista de Engenharia Térmica 4, no. 2 (2005): 97. http://dx.doi.org/10.5380/reterm.v4i2.5408.

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The development of a simple computational procedure that allows the precise determination of important parameters for the thermal and mechanical design of tubular heat exchangers is discussed in the present work. The design of tubular heat exchangers for a wide variety of applications can involve the use of empirical expressions and data tables for the determination of the tube bundle parameters, such as the tube count and the tube bundle outside diameter. The motivation for developing the discussed procedure resides in addressing cases for which empirical expressions are inapplicable or data

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Gylys, J., S. Sinkunas, and T. Zdankus. "ANALYSIS OF TUBE BUNDLE HEAT TRANSFER TO VERTICAL FOAM FLOW." Revista de Engenharia Térmica 4, no. 2 (2005): 91. http://dx.doi.org/10.5380/reterm.v4i2.5038.

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Phenomena of foam flow and associated heat transfer are rather complex. Foam is a twophase flow, which structure changes while it passes an obstacle: bubbles divide into smaller bubbles and liquid drains down from flow. Due to these peculiarities, an application of analytical methods for their study is a complex subject. Thus experimental method of investigation was selected in our work. The investigation apparatus consisted of foam generator, vertical channel and staggered bank of horizontal tubes. The cross section of the channel had square profile with side dimension 140 mm. Tubes in the b

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