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Journal articles on the topic 'Corrugated tube'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Wu, Zhiwei, Caifu Qian, Gang Liu, Zhisheng Liu, and Ping Sheng. "Mechanical Properties and Heat Transfer Performance of Conically Corrugated Tube." Materials 14, no. 17 (2021): 4902. http://dx.doi.org/10.3390/ma14174902.

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Conically corrugated tube is a new type of high-efficiency heat exchange tube. In this paper, the mechanical and heat transfer properties of conically corrugated tubes formed by the cold rolling of smooth tubes are studied through experimental measurement and numerical simulation to lay the foundations for applying the tubes in heat exchangers. The results show that while conically corrugated tube has a lower axial elastic stiffness compared with smooth tube, conically corrugated tube has a higher yield strength and ultimate strength. Unlike smooth tubes, conically corrugated tubes develop thr

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2

Arsana, I. Made, Theodorus Wiyanto Wibowo, Muhaji, Handini Novita Sari, and Haydar Aly Kurniawan. "Effect of Concave Corrugated Tube Shape on The Effectiveness of Double Pipe Heat Exchanger." E3S Web of Conferences 517 (2024): 10002. http://dx.doi.org/10.1051/e3sconf/202451710002.

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Heat exchangers have an important role in everyday life. A heat exchanger is a device used as a means of energy transformation. The development of heat exchangers undergoes a form transformation that aims to increase efficiency through its work function. Double-pipe heat exchanger with a corrugated tube type is a simple and often applied method used in heat transfer. The use of a concave shape on the corrugated tube aims to increase the convection heat transfer area. The purpose of this research is to determine the effect of using concave shapes on corrugated tubes on the effectiveness of doub

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3

Abdewi, Elfetori, and Nedhal Almeraash. "Design, Modelling, and Manufacturing of a Novel Composite Winding Machine for Producing Complex Shapes." مجلة الجامعة الأسمرية: العلوم التطبيقية 6, no. 5 (2021): 382–94. http://dx.doi.org/10.59743/aujas.v6i5.1499.

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This paper aims to design, modeling and manufacturing a prototype composite winding machine used to produce corrugated composite tubes. Seven different types of tubes can be produced: Radial Corrugated Tube (RCT), Radial Corrugated Surrounded by Cylindrical Tube (RCSCT), Cylindrical Tube (CT), Tangential Corrugated Tube (TCT), Tangential Corrugated Surrounded by Cylindrical Tube (TCSCT), Combined Radial and Tangential Corrugated Tube (CRTCT), and Combined Radial and Tangential Corrugated Surrounded by Cylindrical Tube (CRTCSCT). All types can be produced with different size. Although it is des

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4

Zhu, Shenglin, Jinfeng Wang, and Jing Xie. "Numerical Investigation of the Heat Transfer Characteristics of R290 Flow Boiling in Corrugated Tubes with Different Internal Corrugated Structures." Mathematics 9, no. 22 (2021): 2969. http://dx.doi.org/10.3390/math9222969.

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The heat transfer and pressure drop characteristics of R290 flow boiling in a corrugated tube were investigated through computational fluid dynamics (CFD) in this study. We established a model of flow boiling in a corrugated tube with different corrugated structures (rectangular and circular corrugations) and validated the model using the Liu–Winterton and Xu–Fang empirical equations. The heat transfer coefficient (HTC) and pressure drop were obtained at a mass flow rate of 0.04–0.2 kg/s and a water inlet temperature of 310–330 K. The results show that the HTC and the drop in the pressure of t

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5

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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6

Yang, Chen, Min-rui Chen, Jin-yuan Qian, Zan Wu, Zhi-jiang Jin, and Bengt Sunden. "Heat transfer study on a hybrid smooth and spirally corrugated tube." MATEC Web of Conferences 240 (2018): 01038. http://dx.doi.org/10.1051/matecconf/201824001038.

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Corrugated tubes are widely used in a range of applications for heat transfer enhancement. The spirally corrugated tube has a better heat transfer performance than the smooth tube. In this paper, the heat transfer performance of a hybrid smooth and six-start spirally corrugated tube is studied. With a validated numerical model, the effects of the corrugation part length on the vortex in the downstream smooth tube are studied for a range of high Reynolds numbers, where the existence of the corrugation part can turn out the secondary flow and enhance heat transfer. Meanwhile, it is found that in

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7

Xi, Guan Nan, Wei An Xie, and Guo Ru Xie. "Research on and Analysis of Enhanced Heat Transfer Tubes." Applied Mechanics and Materials 448-453 (October 2013): 2908–11. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2908.

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The article makes analysis of the latest research situation and development tendency of several typical enhanced heat transfer tubes, such as spirally corrugated tube, transversely-ridged tube, corrugated tube and converging-diverging tube, as well as comparing their enhanced diathermancy respectively. Therefore, the author’s research will have positive effect on energy utilization efficiency.

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8

Oflaz, Fatma. "Investigation of the effects of binary hybrid nanofluids and different arrangements of corrugated tubes on thermal performance." European Mechanical Science 9, no. 2 (2025): 114–24. https://doi.org/10.26701/ems.1618871.

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This research examined the effects of corrugation distance and nanofluid volume concentration on pressure drop, Nusselt number, and thermal performance in a circular tube. Binary nanofluid (MWCNT/Al₂O₃, 60:40) with volume fractions of 0.25%, 0.5%, and 1% was tested in corrugated tubes with distances of 10 mm, 20 mm, and 30 mm under constant heat flux (20 kW/m²) for Reynolds numbers between 10,000 and 40,000. 3D single-phase model using ANSYS 19 with the standard k-ε turbulence model was employed and validated against literature equations. Results revealed that heat transfer improved with incre

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9

Gacesa, Branka, Tasko Maneski, Vesna Milosevic-Mitic, Miodrag Nestorovic, and Ana Petrovic. "Influence of furnace tube shapeon thermal strain of fire-tube boilers." Thermal Science 18, suppl.1 (2014): 39–47. http://dx.doi.org/10.2298/tsci130317172g.

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The aim of this paper is to use numerical analysis and fine element method-FEM to investigate the influence of furnace tube shape on the thermal strain of fire-tube boilers. Thermal stresses in corrugated furnace tubes of different shape, i.e. with different corrugation pitch and depth, were analysed first. It was demonstrated that the thermal stresses in corrugated furnace tube are significantly reduced with the increase of corrugation depth. Than deformations and stresses in the structure of a fire-tube boiler were analysed in a real operating condition, for the cases of installed plain furn

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10

Kim, Nae-Hyun, and Ho-Seung Han. "Steam Condensation Enhancement by Applying Self-Assembled Monolayer (Chlorosilane) on Titanium Corrugated Tubes." International Journal of Air-Conditioning and Refrigeration 27, no. 01 (2019): 1950009. http://dx.doi.org/10.1142/s2010132519500093.

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It is well known that dropwise condensation enhances the condensation heat transfer coefficient significantly compared with film condensation. In the present study, dropwise condensation heat transfer characteristics on titanium corrugated tubes were investigated. Two corrugated tubes with different corrugation pitch and depth were tested at the steam pressures of 5 and 10[Formula: see text]kPa. To promote dropwise condensation, silane-based SAM was coated. For bare corrugated tubes, significant enhancement of condensation heat transfer was noted, especially for the 2.1/0.2 (corrugation pitch/

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11

Zhang, Zhao, Xuesheng Wang, Qinzhu Chen, and Ting Zhang. "Experimental study on enhanced heat transfer tubes in falling film evaporation." Journal of Physics: Conference Series 2029, no. 1 (2021): 012042. http://dx.doi.org/10.1088/1742-6596/2029/1/012042.

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Abstract The vertical tube falling film evaporation experimental platform was built, and the falling film evaporation heat transfer experiment was carried out. Comparative study was carried out between two types of enhanced heat transfer tubes, which are converging-diverging tube and the transversally corrugated tube, to explore their heat transfer characteristics of falling film evaporation. The results show that the falling film evaporative heat transfer coefficient of the two tubes increases with the increase of the unit peripheral flow rate, the heat transfer temperature difference, heat f

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12

Ugle, Vikas, Lenin Nagarajan, Arulprakasajothi Mahalingam, and Heera Thekkineydeth Rajan. "TLBO algorithm-based optimal heat transfer parameters prediction of Al2O3 water nanofluids in variable pitch corrugated tube heat exchanger." Thermal Science, no. 00 (2023): 236. http://dx.doi.org/10.2298/tsci230724236u.

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This study investigated an aluminium oxide nanofluid water-based tube heat exchanger fitted with a corrugated copper tube under laminar flow conditions. This study is carried out to observe the heat transfer rate within the heat exchanger. The effect of nanoparticle concentrations, the flow rate of the working fluid, and the corrugated tube pitch on the heat exchanger efficiency were analysed. The results show that when Al2O3 water nanofluids are sandwiched between corrugated copper tubes, the heat transfer rate is significantly enhanced compared to the smooth tubes. Nanofluids of aluminium ox

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13

Tong, Zheng Ming, Kai Zhu, Jia Lei Lu, and Gen Li. "Numerical Study of Laminar Flow and Heat Transfer Characteristic in Wave Tubes Based on Sine Curve." Advanced Materials Research 322 (August 2011): 349–52. http://dx.doi.org/10.4028/www.scientific.net/amr.322.349.

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A new type of corrugated tube based on sine function is proposed by introducing a parameter of sine camber in this paper. Computational Fluid Dynamics (CFD) was used to analysis flow state and sine camber of tube influence on the heat transfer and flow. The heat transfer and flow around sinusoidal corrugated tubes with different sine camber e are investigated. According to the numerical calculus result, correlation equations of Nu (Nusselt) =f(Re) is given. At last, the theoretical comparative analysis with field synergy principle is carried out for the heat transfer and flow resistance in smo

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14

Daheriya, Sharad Kumar. "Comparative Experimental Study and Performance Intensification of Heat Exchanger by 55° Corrugated Tube and Twisted Tape Inserts of Pitch Length 1.5." International Journal for Research in Applied Science and Engineering Technology 13, no. 4 (2025): 1182–93. https://doi.org/10.22214/ijraset.2025.68399.

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The principal objective of this comparative experimental analysis is to determine the straight 55° corrugated steel tube heat exchanger is more beneficial to utilize than a standard straight steel tube heat exchanger. Straight tubes make heat exchanger tube fabrication easier. As a result, helical tubes and numerous other smaller tube forms of heat exchangers are inferior to straight tube heat exchangers. Most research on heat transfer coefficients is done for constant heat flow or constant wall temperature, while more recent work considers fluid-to-fluid heat exchange. In parallel flow and co

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15

Kaood, A., T. Abou-Deif, H. Eltahan, MA Yehia, and EE Khalil. "Numerical investigation of heat transfer and friction characteristics for turbulent flow in various corrugated tubes." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 4 (2018): 457–75. http://dx.doi.org/10.1177/0957650918806407.

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Thermal and hydraulic characteristics of turbulent water flow in a transverse corrugated tube with various corrugation direction (inward/outward) and corrugation shape (triangle, curve, rectangle, and trapezoid) are numerically investigated. The axisymmetric model of corrugated tubes with 10 mm inner diameter was investigated by changing the geometrical parameters for Reynolds number ranging from 5000 to 61,000 and constant heat flux boundary condition. Structured, nonuniform grid system is applied. Momentum, continuity, and energy equations were treated by means of a finite volume method usin

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16

Baranyuk, Oleksandr, Nikita Vorobyov, Yevhenii Alekseik, and Anton Mazurenko. "CFD MODELLING OF THERMAL AERODYNAMIC CHARACTERISTICS OF COMPOSITE FLAT-OVAL TUBE WITH INCOMPLETE CORRUGATED FIN." Bulletin of the National Technical University "KhPI". Series: Mathematical modeling in engineering and technologies, no. 1 (August 1, 2023): 10–16. http://dx.doi.org/10.20998/2222-0631.2023.01.02.

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In the article thermo-aerodynamic characteristics of the original design of a heat exchange surface - a flat-oval tube with incomplete corrugated fins, which can be used for the modernization of heat exchange equipment, are studied. The purpose of the work is a preliminary assessment of the efficiency of flat-oval tubes with incomplete corrugated fins and obtaining an empirical dependence for calculation using CFD modeling. The object of the study is forced convection during transverse washing of a composite flat-oval tube with incomplete corrugated fins. The subject of the study is heat trans

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17

Xiao, Yao, Zitao Ma, Mingliang Wu, and Haifeng Luo. "Numerical Study of Pneumatic Conveying of Rapeseed through a Pipe Bend by DEM-CFD." Agriculture 12, no. 11 (2022): 1845. http://dx.doi.org/10.3390/agriculture12111845.

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In the wide-width and high-speed operation of the rapeseed air-feeding planter, the air-feeding seed metering system adopts the top-down seed tube of different structural types in the production process, thus leading to significant differences in the discharge consistency and breakage rate of the respective row in the seeding process. Thus, the corrugated, hole-type, and ordinary round-tube seed tubes were taken as the research objects for this study, and virtual walls were introduced to compare and analyze the movement of seeds after collision with the seed tubes that had different wall struc

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18

Lu, Lin Ping, and Liang Ying. "Comparative Experimental Study on Performance of Corrugated Tube and Straight Tube Heat Exchanger." Advanced Materials Research 560-561 (August 2012): 156–60. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.156.

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The experiments on heat transfer coefficient, pressure drop and thermal stress were done to heat exchangers with corrugated tubes and staight tubes. By analyising and comparing the heat transfer coeffient, pressure drop in tube side and shell side and axial force and stress, some conclusions can be conducted that the corrugated tube heat exchanger has better heat transfer coeffient, higher pressure drop and much lower stress caused by temperatur difference, also, it has obvious advantages under the circumstance of low Reynolds number and high temperature difference.

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19

Tong, Zheng Ming, Kai Zhu, Yong Hai Hu, Li Ye, Jia Lei Lu, and Chao Li. "Convective Heat Transfer Characteristics of Laminar Flow in Sinusoidal Corrugated Tube." Advanced Materials Research 236-238 (May 2011): 1277–82. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1277.

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A new type of corrugated tube based on sine function is proposed by introducing a parameter of sine camber. The heat transfer and flow around sinusoidal corrugated tubes with different sine camber e are investigated in this paper. Computational Fluid Dynamics (CFD) was used to analysis flow state and sine camber of tube influence on the heat transfer and flow, a correlation equations of Nu (Nusselt) =f(Re) is given. At last, the theoretical comparative analysis with field synergy principle is carried out for the heat transfer and flow resistance in smooth tube and sinusoidal corrugated tube. T

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20

Navickaitė, Kristina, Michael Penzel, Christian R. H. Bahl, and Kurt Engelbrecht. "Performance Assessment of Double Corrugated Tubes in a Tube-In-Shell Heat Exchanger." Energies 14, no. 5 (2021): 1343. http://dx.doi.org/10.3390/en14051343.

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In this article, the performance of double corrugated tubes applied in a tube-in-shell heat exchanger is analysed and compared to the performance of a heat exchanger equipped with straight tubes. The CFD (computational fluid dynamics) analysis was performed considering a turbulent flow regime at several mass flow rates. It is observed that the double corrugated geometry does not have a significant impact on the pressure drop inside the analysed heat exchanger, while it has the potential to increase its thermal performance by up to 25%. The ε–NTU (effectiveness–number of transfer units) relatio

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21

Eiamsa-ard, S., and P. Promthaisong. "Counter-rotation vortex flows and heat transfer mechanisms in a V-spirally-corrugated tube." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 7 (2019): 928–52. http://dx.doi.org/10.1177/0957650919829367.

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The flow and heat transfer behavior of newly designed V-corrugated tubes with various numbers of starts ( N = 2, 3, 4, and 5), depth ratios ( DR = 0.02–0.14), and pitch ratios ( PR = 1.0–2.0) were studied in the turbulent flow region (5000 ≤ Re ≤ 20,000). The friction factor ( f), friction factor ratio ( f/ f0), Nusselt number ( Nu), Nusselt number ratio ( Nu/ Nu0), and thermal enhancement factor ( TEF) values are reported. The computational results indicate that the conventional spirally-corrugated tube create swirl flows while V-corrugated tubes generate a counter-rotating vortex flow that i

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22

Zhao, Xiu Ting. "Evaporation-Air-Cooled Heat Exchanger Heat Pipe Research." Advanced Materials Research 694-697 (May 2013): 707–11. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.707.

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The evaporation-air-cooled (methanol) heat exchanger the actual condition, in the same conditions, five different heat exchanger tube simulated temperatures and stress field. The results show the elliptical tube and corrugated tube heat exchangers are best, built-spring pipe is better. Elliptical tube's stress is the maximum, corrugated pipe has stress concentration. Application enhanced heat transfer technology, a relatively compact structure can be used to transfer the required heat, using enhanced tubes instead of smooth tube is an effective method.Considering the safety, cost, and heat tra

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23

Han, Jian Huang, Yang Liu, Zun Ce Wang, and Sen Li. "Numerical Simulation and Structure Optimization on the Corrugated Tubes of a Double Pipe Heat Exchanger." Applied Mechanics and Materials 385-386 (August 2013): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.65.

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The combination of numerical simulation and orthogonal experimental design method can reduce the test number. Structural parametric modeling research on corrugated tube of heat exchangers in our work to establish the fluid flow and heat transfer numerical simulation model. A scheme of orthogonal test of a corrugated tube, which includes 4 factors and 3 levels and has taken heat exchange quantity, resistance of the internal tube and annular gap as evaluation indexes, was designed. A method combining with the difference and the variance analysis was taken to analysis the result of orthogonal tes

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Shannak, B., R. Damseh, M. Al-Odat, M. Al-Shannag, and A. Azzi. "Two-Phase Flow through Corrugated U-Tube." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 11 (2010): 2408–17. http://dx.doi.org/10.1243/09544062jmes1871.

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New measurements of the frictional pressure drop of air—water two-phase flow in a flexible corrugated U-tube have been carried out. Experiments were performed under the following conditions of two-phase parameters: mass flux of 300—800 kg/m2 s, gas quality of 1—60 per cent, and system pressure of 3—7 bar. The inner diameter of the U-tubes tested was 40 mm, with a ratio of curvature radius to inner diameter varying from 3 to 7.5. The results demonstrate that the two-phase flow resistance, energy dissipation, friction losses, and interaction of the two phases in flexible corrugated U-tubes are p

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Han, Huaizhi, Longbin Yang, Yiran Hu, Ruitian Yu, and Qun Zhang. "Numerical study on the influencing mechanism of twisted ratio in outward convex corrugated tubes with a twisted tape insert." Thermal Science 22, Suppl. 2 (2018): 577–84. http://dx.doi.org/10.2298/tsci170614042h.

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Numerical investigations were conducted on flow and heat transfer in an outward convex corrugated tube with various structural twisted tape inserts. The study investigated the influence of twisted ratio on thermodynamic regulation and mechanism in the corrugated tube. The results indicate that Nusselt number in the corrugated tube (Nuc) exceeds those in the corrugated tube and smooth tube by 120-136% and 171-317%, respectively. Meanwhile, the friction factor increases by 148-153% and 476-514%, respectively. The best overall thermal performance (h = 1.97) is obtained with a high twist ratio (y/

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Huang, Dacheng, and Jianrun Zhang. "Numerical Simulation and Experimental Study on Axial Stiffness and Stress Deformation of the Braided Corrugated Hose." Applied Sciences 11, no. 10 (2021): 4709. http://dx.doi.org/10.3390/app11104709.

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To explore the mechanical properties of the braided corrugated hose, the space curve parametric equation of the braided tube is deduced, specific to the structural features of the braided tube. On this basis, the equivalent braided tube model is proposed based on the same axial stiffness in order to improve the calculational efficiency. The geometric model and the Finite Element Model of the DN25 braided corrugated hose is established. The numerical simulation results are analyzed, and the distribution of the equivalent stress and frictional stress is discussed. The maximum equivalent stress o

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27

Yildiz, Sebiha, Zeynep Alparslan, İlker Coşar, Salih Yavuz, and Hasan Güneş. "Investigation of heat transfer and pressure drop in flexible metal hoses with corrugated surfaces." Thermal Science, no. 00 (2024): 154. http://dx.doi.org/10.2298/tsci231217154y.

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In this study, we conducted a numerical investigation of heat transfer and pressure drop in annular corrugated and 1-, 2-, and 3-start spiral-corrugated flexible metal hoses. To validate the numerical results for pressure drop, we established an experimental setup. The pressure drop results were verified through experimental data, while the numerical heat transfer results were validated against existing correlations in the literature. The results obtained using the corrugated flexible metal hoses were compared to those of a smooth tube, and all hoses along with the smooth tube were 1 meter lon

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28

Hou, Zhenhua, Tanghong Xu, Zhijun Zhang, and Jiyu Sun. "Case study: Numerical study of the noise reduction characteristics of corrugated perforated pipe mufflers." Noise Control Engineering Journal 70, no. 1 (2022): 16–36. http://dx.doi.org/10.3397/1/37702.

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Resistant mufflers are commonly used in the wide band noise control of the exhaust of tractor internal combustion engines due to their simple structure, broadband frequency performance and long service life. In this paper, a corrugated perforated pipe muffler was proposed based on an improved design of a straight-through perforated pipe muffler to reduce the exhaust noise of internal combustion engines. The acoustic attenuation performance of the corrugated perforated tube muffler under the action of nonuniform flow and a temperature gradient was predicted by using the one-way flow-acoustic co

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Venkatesaperumal, Ramalingam, Kutbudeen Syed Jafar, Perumal Venkatesan Elumalai, et al. "Heat Transfer Studies on Solar Parabolic trough Collector Using Corrugated Tube Receiver with Conical Strip Inserts." Sustainability 15, no. 1 (2022): 378. http://dx.doi.org/10.3390/su15010378.

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The heat transfer characteristics of the working fluid passing through the absorber of a solar parabolic trough collector (SPTC) can be enhanced by the creation of a turbulence effect. Therefore, a novel idea was implemented by introducing a corrugated tube (CT) absorber instead of a plain tube absorber in a solar parabolic trough collector. The heat transfer enhancement was improved further through the use of conical strip inserts inside the corrugated tube absorber of the SPTC. A corrugated tube (CT) receiver with a pitch of 8 mm and corrugation height of 2 mm was used with three different p

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Cao, Yan, Hamdi Ayed, Ali E. Anqi, Omid Tutunchian, Hamed Sadighi Dizaji, and Samira Pourhedayat. "Helical tube-in-tube heat exchanger with corrugated inner tube and corrugated outer tube; experimental and numerical study." International Journal of Thermal Sciences 170 (December 2021): 107139. http://dx.doi.org/10.1016/j.ijthermalsci.2021.107139.

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Zhao, Xiang, Anheng Wang, Jianbin Wang, Chuanwen Ling, and Xiaolong Gui. "Study on the Microstructure and Properties of AISI 304 Stainless Steel Corrugated Pipes by Aging and Solution Treatments." Materials 18, no. 6 (2025): 1387. https://doi.org/10.3390/ma18061387.

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This article focuses on the microstructural evolution and mechanical property changes of AISI 304 austenitic stainless steel corrugated pipes after aging treatment and solution treatment. The influence of different heat treatment processes on the microstructural evolution, second phase precipitation behavior, mechanical properties, and corrosion resistance of corrugated pipes was analyzed through metallographic microscopy (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), fatigue testing, hardness testing, and corrosion resistance experiments. The results showed

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Wang, K., W. Q. Teng, J. F. Wang, and J. Xie. "Boiling heat transfer of R32 and R22 in spiral corrugated tube with a vertical groove." Journal of Physics: Conference Series 2047, no. 1 (2021): 012019. http://dx.doi.org/10.1088/1742-6596/2047/1/012019.

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Abstract In this paper, a three-dimensional steady-state boiling model of the spiral corrugated tube with a vertical groove is established by ANSYS Fluent 18.0. The model is a double tube structure, the water flow in the outer tube, the refrigerant flow in the inner tube, and the inner tube is a new type of spiral corrugated tube with a vertical groove inside the groove. Firstly, the physical properties difference between R32 and R22 is analyzed. Subsequently, the boiling heat transfer characteristics of R22 and R32 in the vertical groove inner spiral corrugated tube with different pipe diamet

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Rafiei, Alireza, Reyhaneh Loni, Gholamhassan Najafi, and Talal Yusaf. "Study of PTC System with Rectangular Cavity Receiver with Different Receiver Tube Shapes Using Oil, Water and Air." Energies 13, no. 8 (2020): 2114. http://dx.doi.org/10.3390/en13082114.

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Today, application of cavity receivers in solar concentrator systems is suggested as an interesting and novelty research subject for increasing thermal performance. In this research, a parabolic trough concentrator (PTC) with a rectangular cavity receiver was energetically investigated. The cavity receiver was studied with smooth and corrugated tubes. Different solar heat transfer fluids were considered, including water, air, and thermal oil. The effect of different operational parameters, as well as structural parameters, was investigated. The results showed that the linear rectangular cavity

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Kishimoto, Naotaka, Akiko Otsuka, Tatsuru Tsurumaki, and Kenji Seo. "Unexpected Anesthetic Circuit Leak Attributed to Improper Use of a Tube Holder: A Case Report." Anesthesia Progress 68, no. 3 (2021): 154–57. http://dx.doi.org/10.2344/anpr-68-02-02.

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Leaks involving the anesthesia circuit can cause significant complications including hypoxia and hypoventilation. We present a case of a circuit leak caused by damage to the corrugated tubing attributed to improper use of the tube holder. A 58-year-old male was scheduled for resection of a palatal tumor under an intubated general anesthetic. After successful nasotracheal intubation, the anesthesiologist inserted the corrugated tubing of the anesthetic circuit into the tube holder. A leaking sound was heard and a tear in the corrugated tubing was promptly discovered. The corrugated tubing of th

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Kishimoto, Naotaka, Akiko Otsuka, Tatsuru Tsurumaki, and Kenji Seo. "Unexpected Anesthetic Circuit Leak Attributed to Improper Use of a Tube Holder: A Case Report." Anesthesia Progress 68, no. 3 (2021): 154–57. http://dx.doi.org/10.2344/anpr-68-02-02.

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Leaks involving the anesthesia circuit can cause significant complications including hypoxia and hypoventilation. We present a case of a circuit leak caused by damage to the corrugated tubing attributed to improper use of the tube holder. A 58-year-old male was scheduled for resection of a palatal tumor under an intubated general anesthetic. After successful nasotracheal intubation, the anesthesiologist inserted the corrugated tubing of the anesthetic circuit into the tube holder. A leaking sound was heard and a tear in the corrugated tubing was promptly discovered. The corrugated tubing of th

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Uhlig, R., B. Gobereit, and J. Rheinländer. "Advancing Tube Receiver Performance by Using Corrugated Tubes." Energy Procedia 69 (May 2015): 563–72. http://dx.doi.org/10.1016/j.egypro.2015.03.065.

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Gao, J. Y., W. Q. Teng, J. F. Wang, and J. Xie. "Boiling simulation and PEC evaluation of helically corrugated tubes in vertical grooves with different pipe diameters." Journal of Physics: Conference Series 2047, no. 1 (2021): 012013. http://dx.doi.org/10.1088/1742-6596/2047/1/012013.

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Abstract The double tube structure is simulated, R32 in the inner helical corrugated tubes with vertical grooves is heated by the water flowing in the outer tube to make it boil. The influence of pipe diameter and number of vertical grooves on the performance of double tube is analyzed. The evaporation temperature of the refrigerant is 283K. The temperatures of inlet refrigerant and inlet water are 280K and 320K, respectively. The flow velocity of inlet refrigerant and inlet water are 1m/s and 5m/s, respectively. The simulation results show that, compared with the smooth pipe, when the inner p

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Zhong, Yuzhou, Jingquan Zhao, Lei Zhao, Ge Gao, and Xiaowei Zhu. "Heat Transfer and Flow Resistance in Crossflow over Corrugated Tube Banks." Energies 17, no. 7 (2024): 1641. http://dx.doi.org/10.3390/en17071641.

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The engineering of tubes with surface corrugations is recognized as an effective method for enhancing heat transfer within the tube. Yet the impact of surface corrugation on the flow and heat transfer around the tube’s exterior remains inadequately explored. This study investigates the crossflow and heat transfer characteristics in banks of periodically inward-corrugated tubes using computational fluid dynamics. Numerical simulations were performed for both in-line and staggered tube arrangements, covering Reynolds numbers from 1000 to 10,000. The aim was to examine how various corrugation par

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Li, Hui Fang, Cai Fu Qian, and Xiao Dong Yu. "Effects of Tube Stiffness and Tubesheet Thickness on the Thermal Stress of the Tubes and Tubesheet." Advanced Materials Research 314-316 (August 2011): 1552–55. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1552.

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In this paper, numerical simulation was carried out for the tube bundle of a float-head heat exchanger with concentration on the effects of tube stiffness and tubesheet thickness on the thermal stress of the tubes and tubesheet. It is found that decreasing the tube stiffness by using corrugated tubes can reduce the axial thermal stress at the tubes and, thus, decrease the possibility of strength failure of the connection between the tubes and tubesheet. Decreasing the tubesheet thickness can reduce the thermal stress at the tubesheet, which is meaningful for the heat exchangers with large temp

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Djordjevic, Milan, Velimir Stefanovic, Dragan Kalaba, Marko Mancic, and Marko Katinic. "Radiant absorption characteristics of corrugated curved tubes." Thermal Science 21, no. 6 Part B (2017): 2897–906. http://dx.doi.org/10.2298/tsci160420263d.

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The utilization of modern paraboloidal concentrators for conversion of solar radiation into heat energy requires the development and implementation of compact and efficient heat absorbers. Accurate estimation of geometry influence on absorption characteristics of receiver tubes is an important step in this process. This paper deals with absorption characteristics of heat absorber made of spirally coiled tubes with transverse circular corrugations. Detailed 3-D surface-to-surface Hemicube method was applied to compare radiation performances of corrugated and smooth curved tubes. The numerical r

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LAOHALERTDECHA, S., A. S. DALKILIC, and S. WONGWISES. "A REVIEW ON THE HEAT-TRANSFER PERFORMANCE AND PRESSURE-DROP CHARACTERISTICS OF VARIOUS ENHANCED TUBES." International Journal of Air-Conditioning and Refrigeration 20, no. 04 (2012): 1230003. http://dx.doi.org/10.1142/s2010132512300030.

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The enhanced tube is a kind of the passive technique for improving the thermal performance of the heat exchangers with a little increase of the friction penalty. They have stated to use instead of the common smooth tubes for designing of the heat exchangers. The size of these heat exchangers can be reduced considerably by using the enhanced tubes instead of smooth tubes. Normally, they are divided into four groups: the corrugated tube, ribbed tube, grooved tube, and fluted tube. Compared with the common smooth tube, many researchers reported that use of the enhanced tubes dramatically increase

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Siricharoenpanitch, Anumut, Jarinee Jongpleampiti, Nittaya Naphon, Smith Eiamsa-ard, and Paisarn Naphon. "Numerical Analysis of the Pulsating Heat Transfer of Ferrofluid in Helically Fluted Tubes." Mathematical Modelling of Engineering Problems 9, no. 5 (2022): 1251–60. http://dx.doi.org/10.18280/mmep.090512.

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The flow and heat transfer characteristics in the corrugated tube mainly depend on flow parameters and geometric configurations of the tube, such as corrugated cross-section, corrugated angle, corrugated arrangement, corrugated pitch and depth, pulsating flow frequency, coolant types, and Reynolds number. This paper presents the pulsating thermal characteristics of ferrofluid flowing in the fluted tube using the de-ionized water and 0.015% by volume as working fluid flowing in the test section. Eulerian two-phase turbulence model validation has been performed in both steady and pulsating flow.

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SERAFIN, STEFANIA, and JURAJ KOJS. "Computer models and compositional applications of plastic corrugated tubes." Organised Sound 10, no. 1 (2005): 67–73. http://dx.doi.org/10.1017/s1355771805000683.

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A flexible plastic corrugated tube known as the Hummer was a popular sonic toy in the early 1970s. It produces pleasing sonorities when whirled in the air. In this article, we propose a physically informed model of a singing corrugated tube. The model was used in the composition Garden of the Dragon, which is also described in this paper.

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Jiang, Hongyong, Yiru Ren, Zhihui Liu, Songjun Zhang, and Xiaoqing Wang. "Evaluations of failure initiation criteria for predicting damages of composite structures under crushing loading." Journal of Reinforced Plastics and Composites 37, no. 21 (2018): 1279–303. http://dx.doi.org/10.1177/0731684418783847.

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The crushing behaviors of thin-walled composite structures subjected to quasi-static axial loading are comparatively evaluated using four different failure initiation criteria. Both available crushing tests of composite corrugated plate and square tube are used to validate the stiffness degradation-based damage model with the Maximum-stress criterion. Comparatively, Hashin, Maximum-stress, Stress-based Linde, and Modified criteria are respectively implemented in the damage model to predict crush behaviors of corrugated plate and square tube. To develop failure criteria, effects of shear coeffi

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Wu, Shuang Ying, Lan Xiao, Si Min Chen, and Feng Hua Guo. "Exergo-Economic Performance Evaluation of Enhanced Tube under Equivalent Pump Power Consumption." Advanced Materials Research 354-355 (October 2011): 310–14. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.310.

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Based on the first and second laws of thermodynamics as well as exergo-economic theory, comprehensive performance evaluation criterion has been proposed for enhanced tube under the condition of equivalent pump (fan) power consumption, accounting for a variety of factors such as heat transfer, flow and investment costs. Performance evaluation criterion formula, namely, net profit value (NPV) has been derived from the perspective of the exergy recovery. Take spirally corrugated tube as an example, the results show that the exergo-economic performance of the spirally corrugated tube is superior t

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Reyaz-Ur-Rahim, Mohd, P. K. Bharti, and Afaque Umer. "Axial Crushing Behaviors of Thin-Walled Corrugated and Circular Tubes - A Comparative Study." Technological Engineering 14, no. 1 (2017): 5–10. http://dx.doi.org/10.1515/teen-2017-0001.

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Abstract With the help of finite element analysis, this research paper deals with the energy absorption and collapse behavior with different corrugated section geometries of hollow tubes made of aluminum alloy 6060-T4. Literature available experimental data were used to validate the numerical models of the structures investigated. Based on the results available for symmetric crushing of circular tubes, models were developed to investigate corrugated thin-walled structures behavior. To study the collapse mechanism and energy absorbing ability in axial compression, the simulation was carried in

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Kim, Jin Bong. "Effects on Mechanical Behavior of the Flexible Tube for Automobile." Applied Mechanics and Materials 152-154 (January 2012): 749–52. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.749.

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Flexible tubes are commonly used in automobile and piping systems to absorb expansion and contraction in order to reduce stress. Unlike to other piping components, flexible tubes consist of a thin walled shell of revolution with a corrugated meridian, in order to provide the flexibility needed to absorb mechanical movements. It is very complicated to analyze the behavior of flexible tubes because of its complex figure. Some fundamental behavior of the flexible tube for automobile is reported with analysis method. Obtained results are as follows; (1) The von-Mises stress is increased with incre

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Sethumadhavan, R., and M. Raja Rao. "Turbulent Flow Friction and Heat Transfer Characteristics of Single- and Multistart Spirally Enhanced Tubes." Journal of Heat Transfer 108, no. 1 (1986): 55–61. http://dx.doi.org/10.1115/1.3246905.

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Investigations have been carried out on heat transfer and frictional characteristics of five spirally corrugated tubes of one to four corrugation starts, having the same helix angle, but of varying geometrical aspect ratios, for the turbulent flow of water and 50 percent glycerol. The thermal performance of these tubes was found to be superior compared to a smooth tube. Friction factors and heat transfer coefficients in these rough tubes were analysed on the basis of momentum and heat transfer analogy, and the correlation obtained was tested with the present data and also the published results

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Sadighi Dizaji, Hamed, Samad Jafarmadar, and Soheil Asaadi. "Experimental exergy analysis for shell and tube heat exchanger made of corrugated shell and corrugated tube." Experimental Thermal and Fluid Science 81 (February 2017): 475–81. http://dx.doi.org/10.1016/j.expthermflusci.2016.09.007.

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Sun, Haibo, Linlin Zhang, Yu Liu, Baodong Liu, and Mingyang Feng. "Axial Compression Behavior of Large-Diameter, Concrete-Filled, Thin-Walled Galvanized Helical Corrugated Steel Tubes Column Embedded with Rebar." Buildings 14, no. 1 (2023): 24. http://dx.doi.org/10.3390/buildings14010024.

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Thin-walled galvanized helical corrugated steel tubes (HCSTs) filled with concrete are promising composite members, consisting of concrete, an anti-corrosion shell, and a multifunctional exterior corrugated steel tube. To investigate the synergistic working mechanism of concrete-filled HCSTs (CFHCSTs), six specimens were designed for axial compression tests, with the inner diameter of the column and the volumetric steel ratios of the longitudinal reinforcement as the variation parameters. The results show that HCSTs can better confine the concrete core and increase its strength. The failure mo

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