Relevant bibliographies by topics / Corrugated tube

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Corrugated tube'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Corrugated tube"

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 (August 28, 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 three-dimensional stresses when an axial tensile load is applied to them. In addition, the heat transfer coefficient of conically corrugated tube is 15%, 17%, and 115% higher than that of spiral grooved tube, convergent divergent tube, and smooth tube, respectively. Finally, the correlation equations of the axial stress concentration factor, stiffness equivalent coefficient, Nusselt number, and flow resistance coefficient of conically corrugated tubes are obtained for engineering application.
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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 furnace tube and corrugated furnace tubes with different shapes. It was concluded that in this fire-tube boiler, which is of larger steam capacity, the corrugated furnace tube must be installed, as well as that the maximal stress in the construction is reduced by the installation of the furnace tube with greater corrugation depth. The analysis of stresses due to pressure and thermal loads pointed out that thermal stresses are not lower-order stresses in comparison to stresses due to pressure loads, so they must be taken into consideration for boiler strength analysis.
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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 the smooth part, the fluid flow part with whirling can reach a maximum length, even if the length of the corrugation part continuously increases. Thus a series of critical corrugation lengths can be obtained. This work can reveal the enhanced heat transfer mechanism of the hybrid smooth and spirally corrugated tube and be of interest to researchers in heat transfer issues of corrugated tubes.
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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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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 (March 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/corrugation depth in mm) tube. For SAM-coated tubes, the heat transfer enhancement was significant (2.61 at 5[Formula: see text]kPa and 2.45 at 10[Formula: see text]kPa) for the smooth tube. For the corrugated tubes, however, the enhancement decreased to 1.78 and 2.22 for 8.7/0.4 tube and to 1.26 and 1.52 for 2.1/0.2 tube. The present results suggest that corrugations may not be as an effective heat transfer method for dropwise condensation as it is for film condensation. This result was supported by the photos taken by mist spray, which suggested that surface tension drained condensation by corrugations is not a major heat transfer mechanism for dropwise condensation on corrugated tubes.
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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 smooth tube and sinusoidal corrugated tube.
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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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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 (October 18, 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 using the SIMPLE scheme with the k–ε turbulence model and enhanced wall treatment. The results reveal that corrugation direction and corrugation shape have perceptible effects upon the heat transfer in the form of Nusselt number ( Nu) and pressure drop in the form of friction factor (ƒ). The average Nu for (inward) trapezoidal, rectangular, curved, and triangular corrugation shapes are 52.61%, 50.12%, 47.82%, and 44.96%, respectively, higher than the smooth tube. The average Nu for (outward) trapezoidal, curved, triangular, and rectangular corrugation shapes are 48.31%, 45.72%, 41.23%, and 40.94%, respectively, which are higher than a smooth tube. The results reveal that both inward/outward curved and triangular roughness shape have the superior performance evaluation criterion than rectangular and trapezoidal. Turbulence kinetic energy contour shows the increase in heat transfer performance for all corrugated tubes compared with a smooth tube. Inward corrugated tube provides the highest turbulence kinetic energy along the tube length and, consequently, the highest heat transfer. In addition, inward corrugated tubes provide the highest values and homogeneity of the velocity distribution along the core of tubes.
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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 (April 27, 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 perceptible about two to five times greater than those in smooth U-tubes. Hence, the two-phase friction factor of such tubes increases from 0.65 to 1.4, depending on the influencing flow and geometrical parameters. The available correlations in the open literature present a similar trend and behaviour. However, they predict the data presented poorly because of the complex geometry of the flexible corrugated U-tube. Based on the energy balance and the presented experimental results, a new model has been developed to calculate the frictional two-phase pressure drop and hence the friction factor of the flexible U-tube. The model includes the relevant primary parameter, fits the experimental data well, and is sufficiently accurate for engineering purposes. The standard deviation of the data is less than 7 per cent. The reported results enable a practical design with standard products and optimization of the geometry of the flexible corrugated U-tube for specific conditions.
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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 (March 1, 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) relation also demonstrates the advantage of using double corrugated tubes in tube-in-shell heat exchangers over straight tubes.
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Dissertations / Theses on the topic "Corrugated tube"

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Von, Bentheim Karl-Heinz. "An investigation into the parameters affecting the performance of tube mills : the behaviour of a single particle on a corrugated liner inside a rotating cylinder." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/17352.

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Includes bibliographical references.
This thesis is the second stage of a project to investigate the parameters affecting the performance of tube mills. The main topics that the project will cover are the motion of the mill charge and the wear characteristics of the mill charge and mill liners. Nates, in his thesis, performed a literature survey that highlighted the need for an investigation into the motion of a particle with emphasis on the response to changes in the coefficient of friction between the particle and the liner. Nates developed theoretical models for a particle moving on the inside of a rotating liner. The models developed were for a block and sphere moving on a flat liner. Although a better understanding of the motion of a particle was achieved, the models did not take all the variables into account. One of the assumptions made by Nates was that the particle was moving on a flat liner. This thesis concentrates on the motion of a particle on a corrugated liner in a rotating cylinder. Two formulations are presented that model the motion of a particle. The first model assumes that the particle being modelled is a block. The modelling of the particle as a block ensures that the particle does not roll. There are two possibilities as to the type of motion which the block can experience. The first possibility is where the block moves at the same velocity as the - rotating liner whilst the second possibility is where the block can slide relative to the rotating liner. Three different liner configurations were used in the investigation of the motion of a block. The second model assumes that the particle can move with pure rolling as well as with a combination of rolling and sliding. For pure rolling it is assumed that at the point of contact between the sphere and liner that there is no skidding or sliding. The governing equations for the model of a block on a corrugated liner are solved numerically using a Fourth-Order Runge-Kutta Method. The theoretical predictions of the motion of a block on a corrugated liner are presented - and discussed. The model for a sphere on a corrugated liner was derived but no attempt was made to solve it numerically. It is envisaged that the numerical solution of the model for a sphere will be included in the next stage of the project. An experimental investigation was done to validate the theoretical model for a block on a corrugated liner. Only two of the three liners used in the numerical investigation were tested. There was good correlation between the experimental results and the theoretical predictions. All the experimental results are presented and comparisons made between the theoretical predictions and the experimental results. The thesis is concluded with a discussion of trends and observations made during the investigation into the motion of a block on a corrugated liner, and it is shown that the model for a block on a corrugated liner does satisfactorily predict the response of the block to varying initial conditions. Suggestions are also made as to possible ways to improve and expand on the current models used to describe the motion of a mill charge.
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Sochorec, Rostislav. "Kvantifikace tepelně-hydraulických charakteristik flexibilního prvku s využitím experimentálních dat." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-403866.

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The diploma thesis aims to establish thermo-hydraulic properties of a flexible tube described by its Darcy friction factor and film heat transfer coefficient respectively. A flexible tube (corrugated stainless steel tube) is an easily shapeable stainless steel component used to build various piping connections, in a place of more common copper or plastic made tubes. It can also be used to build heat exchangers thanks to its signature properties. The investigated product is the one developed and manufactured by the Czech company Flexira s.r.o. and sold under the brand name xConnect System. Its thermo-hydraulic properties are established by an experiment, which is based on real utilizations by Laboratory of Energy Intensive Processes in NETME (New Technologies for Mechanical Engineering) Centre at Brno University of Technology. The investigated case is a coil-shaped element serving a purpose of a water-to-water heat exchanger. The text contains a literature survey of the chosen flexible tube and a description of a draft and development of the specific experimental test based off the established theory. The obtained results are then analysed, for the purpose of establishing a functional dependence, which can then be used to calculate a film heat transfer coefficient.
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Long, Matthew B. "Filmwise condensation of steam on horizontal corrugated and wire-wrapped corrugated tubes." Thesis, Monterey, California. Naval Postgraduate School, 1993. http://hdl.handle.net/10945/27053.

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Heat transfer performance of horizontal roped tubes was studied using an evaporator/condenser test rig. The condenser section contained a single horizontal tube and was operated at both vacuum and atmospheric conditions. A vacuum pump was integral to the system to ensure the presence of noncondensible gases did not affect the results. The test tubes were Wolverine MHT Korodense titanium tubes with an outside diameter of 16.07 mm and a corrugation pitch of 8 mm. The effect of wire-wrapping was studied using titanium wires ranging from 0. 1 to 1.6 mm in diameter corresponding to a range of pitch to diameter ratio from 80 to 5. The outside heat transfer coefficient, h(sub O)o, was determined by first experimentally obtaining the overall heat transfer coefficient, U(sub O)o, and then utilizing a modified Wilson Plot procedure. Results obtained for steam condensation indicate that the MHT Korodense titanium tube provides negligible enhancement compared to the a titanium tube. The addition of wire-wrapping provided minimal increase in the outside heat transfer coefficient, about 8% at a fractional coverage of approximately 5% corresponding to a pitch to wire diameter ratio near 20
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Bertin, Marco. "Il tubo corrugato applicato ad un velocipede." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10222/.

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Vychopeň, Petr. "Hodnocení kvality nerezového vlnovce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241208.

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Stainless corrugated tubes are used in many applications, mainly in automotive industry, distribution of various media, ventilation etc. The first part of the thesis is focused on description of the corrugated tube, identification of differences between corrugated pipe and hose, recommended materials for production and characterization of main technical parameters. The general production process of stainless corrugated tubes and the most common tests of mechanical properties are described. The second part of the thesis is focused on the comparison of the level of quality of the selected raw materials and evaluates the impact of partially degraded tools on the surface texture of the corrugated tube. The last part presents the results of measurements and practical recommendations.
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Chin, V.-Liam, and 陳威霖. "Shear Strength Design and Tests of Circular Reinforced Concrete Columns Confined with a FRP-Wrapped Spiral Corrugated Tube." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/27213936131256612485.

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碩士
國立臺灣大學
土木工程學研究所
104
This study is conducted to investigate the shear strength of FRP-Wrapped Spiral Corrugated Tube (FWSCT) confined circular concrete columns. In order to study the shear strength of the Spiral Corrugated Tube and the FRP jacket, two shear strength models (UCSD shear model and residual shear model) are adopted in this analytical procedure. In this experimental program, two FRP-Wrapped Spiral Corrugated Tube (FWSCT) Circular Concrete Columns with different amount of FRP confinement were tested under cyclic lateral loading with a constant axial load level. The main variable was the confinement ratio of the FRP jacket, which can be controlled by wrapping different number of FRP sheets around the Spiral Corrugated Tube. Two columns, FWSCT-1 and FWSCT-3 were designed based on a reference column, FWSCT-0 (Wu 2015), which confined by only a spiral corrugated tube with 0.4 mm thick and 1940 mm tube length. FWSCT-1 and FWSCT-3 were wrapped by additional one-layer and three-layer of Glass Fiber-Reinforced Polymer (GFRP) jackets around a spiral corrugated tube, respectively. Test results showed that the brittle shear failure in specimen FWSCT-0 is improved by wrapping one-layer of the GFRP jacket as seen in the test of specimen FWSCT-1. Specimen FWSCT-1 failed at 4% story drift, resulting in flexural-shear failure of column, while specimen FWSCT-3 failed at 7% story drift, resulting in flexural failure of longitudinal bars.
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Wu, Kai-Yi, and 吳愷毅. "Seismic Tests of Circular Reinforced Concrete Columns Confined with a Spiral Corrugated Tube and Glass Fiber Reinforced Polymer (GFRP) Materials." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/46383100800865810693.

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碩士
國立臺灣大學
土木工程學研究所
103
This thesis has studied the seismic behavior of FRP-Wrapped Spiral Corrugated Tube (FWSCT) confined circular reinforced concrete columns. In order to analyze the behavior of FWSCT confined reinforced concrete columns under axial load and lateral hysteric load, a load-displacement program was written and compiled in VBA developed by the author. With use of this program, the section response of circular concrete columns confined by two types of materials tube can be modeled. Finally, the load-displacement curve can be obtained by the moment -curvature curve and a suitable plastic hinge length. The analysis theories are from Lee (2006) & Tan (2014). Three specimens were built to test the performance of FWSCT confined reinforced concrete columns. One control specimen (only spiral corrugated tube confined, FWSCT-0) and two FWSCT confined reinforced concrete columns with 5 layers (FWSCT-5) and 8 layers (FWSCT-8) of GFRP were test under constant axial load and lateral reverse cyclic load in NCREE conducted by MATS. Two FRP-wrapped spiral corrugated tubes were made in Jubei, Taiwan, and got good quality. Test results showed that specimens FWSCT-0 suffered shear failure, while specimens FWSCT-5 & FWSCT-8 suffered longitudinal steel rupture with story drift up to 8%. It was found that the plastic hinge location was different from past research. After calibrated the experimental data and studied the effects of the plastic hinge position and length, the author found a reasonable way to explain the unusual results and can deal with the problems. Finally the analysis results have good correlation with the test result.
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Books on the topic "Corrugated tube"

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Singace, A. A. Corrugated tubes under axial compression. Manchester: UMIST, 1994.

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Long, Matthew B. Filmwise condensation of steam on horizontal corrugated and wire-wrapped corrugated tubes. Monterey, Calif: Naval Postgraduate School, 1993.

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3

NCCER. 02110-05 Corrugated Stainless Steel Tubing TG. Pearson Education, Limited, 2004.

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4

Parker, Philip M. The 2007-2012 World Outlook for Paper Industry Machines for Making Paper and Paperboard Cartons, Boxes, Cases, Tubes, Drums, and Similar Containers Excluding ... Molding and Corrugated Box Making Machines. ICON Group International, Inc., 2006.

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Book chapters on the topic "Corrugated tube"

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Dolgosheev, P. I., V. A. Mitrochin, G. G. Svalov, V. E. Sytnikov, N. A. Yakhtinskiy, G. Ziemek, and P. Rhoner. "Experimental Research Nb3Sn-Based Corrugated Superconducting Tube." In Advances in Cryogenic Engineering Materials, 161–68. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-9880-6_21.

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Zinovieva, Tatiana V. "Calculation of Equivalent Stiffness of Corrugated Thin-Walled Tube." In Advances in Mechanical Engineering, 211–20. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11981-2_19.

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Eyvazian, Arameh, Sara Najafian, Hozhabr Mozafari, and A. Praveen Kumar. "Crashworthiness Analysis of a Novel Aluminum Bi-tubular Corrugated Tube—Experimental Study." In Lecture Notes in Mechanical Engineering, 599–607. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1724-8_55.

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Wei, Hsien-Hung, and David S. Rumschitzki. "The Linear Stability of a Core Annular Flow in a Corrugated Tube." In Fluid Mechanics and Its Applications, 127–37. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-1996-4_12.

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Kumar, P., F. Topin, M. Miscevic, P. Lavieille, and L. Tadrist. "Heat Transfer Enhancement in Short Corrugated Mini-Tubes." In Advanced Structured Materials, 181–208. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30532-0_7.

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Romero, U., A. López-Villa, A. Medina, and G. Domínguez Zacarías. "Experimental Study of the Growth of Bubbles in Corrugated Tubes." In Experimental and Computational Fluid Mechanics, 187–95. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00116-6_13.

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Lin, Li-he, Lian-fang Hu, Shi-xao Chen, Chu-yun Liu, Zhi-fang Sun, and He Chen. "Enhancement of Condensation Heat Transfer Inside V-Type Corrugated Vertical Tubes." In Advances in Cryogenic Engineering, 423–30. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2213-9_48.

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Rawat, Sharad, A. K. Upadhyay, and K. K. Shukla. "Crushing Analysis of Tapered Circular Corrugated Tubes Subjected to Impact Loading." In Lecture Notes in Civil Engineering, 197–205. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0365-4_17.

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Chalaev, Djamalutdin, and Nina Silnyagina. "DEVELOPMENT OF HIGH EFFICIENT SHELL-AND-TUBE HEAT EXCHANGERS BASED ON PROFILED TUBES." In Integration of traditional and innovation processes of development of modern science. Publishing House “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-26-021-6-42.

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The use of advanced heat transfer surfaces (corrugated tubes of various modifications) is an effective way to intensify the heat transfer and improve the hydraulic characteristics of tubular heat exchangers. The methods for evaluating the use of such surfaces as working elements in tubular heat exchangers have not been developed so far. The thermal and hydrodynamic processes occurring in the tubes with the developed surfaces were studied to evaluate the efficiency of heat exchange therein. Thin-walled corrugated flexible stainless steel tubes of various modifications were used in experimental studies. The researches were carried out on a laboratory stand, which was designed as a heat exchanger type "tube in tube" with a corrugated inner tube. The stand was equipped with sensors to measure the thermal hydraulic flow conditions. The comparative analysis of operation modes of the heat exchanger with a corrugated inner tube of various modifications and the heat exchanger with a smooth inner tube was performed according to the obtained data. Materials and methods. A convective component of the heat transfer coefficient of corrugated tube increased significantly at identical flow conditions comparing with a smooth tube. Increasing the heat transfer coefficient was in the range of 2.0 to 2.6, and increased with increasing Reynolds number. The increase in heat transfer of specified range outstripped the gain of hydraulic resistance caused by increase of the flow. Results and discussion. CFD model in the software ANSYS CFX 14.5 was adapted to estimate the effect of the tube geometry on the intensity of the heat transfer process. A two-dimensional axially symmetric computer model was used for the calculation. The model is based on Reynolds equation (Navier-Stokes equations for turbulent flow), the continuity equation and the energy equation supplemented by the conditions of uniqueness. SST-turbulence model was used for the solution of the equations. The problem was solved in the conjugate formulation, which allowed assessing the efficiency of heat exchange, depending on various parameters (coolant temperature, coolant velocity, pressure). The criteria dependences were obtained Nu = f (Re, Pr). Conclusions. The use a corrugated tube as a working element in tubular heat exchangers can improve the heat transfer coefficient of 2.0 - 2.6 times, with an increase in hydraulic resistance in the heat exchanger of 2 times (compared with the use of smooth tubes). The criteria dependences obtained on the basis of experimental studies and mathematical modeling allow developing a methodology for engineering calculations for the design of new efficient heat exchangers with corrugated tubes.
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Han, Huaizhi, Bingxi Li, Yaning Zhang, Quan Zhu, and Ruitian Yu. "Heat and Mass Transfer in Outward Convex Corrugated Tube Heat Exchangers." In Heat and Mass Transfer - Advances in Science and Technology Applications. IntechOpen, 2019. http://dx.doi.org/10.5772/intechopen.85494.

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Conference papers on the topic "Corrugated tube"

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Li, Yang, and Zhong You. "Corrugated Tube Inversion for Energy Absorption." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47135.

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Thin-walled tubes subjected to axial crushing have been extensively used as energy absorbers in transportation system. It has been known for some time that inversion of a circular tube can have very high energy absorption capability and a stable reaction force. However, its inversing mechanism is rather unstable, and it requires a lubricated contact surface, both of which largely hinder its wide application. This paper proposes to use corrugated tube for inversion, which provides a stable inversing mechanism and no requirement for lubricated contact. Furthermore to the improvement of inversing stability, a comparison between inversion of corrugated tube and buckling of circular tube has been done. It shows that the inversion of the corrugated tube has longer stroke, higher energy absorption capability and better load uniformity than that of buckling of circular tube.
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Yao, Zhi-Min, Zhi-Gang Feng, Zuo-Qin Qian, and Zhi-Zhe Chen. "Heat Transfer Enhancement for Turbulent Flows in Corrugated Tubes." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37520.

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Heat transfer rate and pressure drop of turbulent flows of water in a smooth-wall tube and five corrugated tubes at Reynolds numbers between 7,500 and 50,000 are studied using the commercial software FLUENT. The corrugated tube is constructed by placing protruded ridges evenly along a tube. Depending on the different design of corrugated tubes, our numerical simulation results show that the use of corrugated tubes can improve heat transfer rate by a factor of 1.5 to 2 at Reynolds numbers between 7,500 and 12,000 when compared to a smooth-wall tube. However, the rate of enhancement gradually decreases to a factor of 1.1 to 1.5 as flow Reynolds number increases to 50,000. We further studied the pressure drop and friction factors of the corrugated tube. For the corrugated tube with the highest heat transfer enhancement, we found the pressure drop increases by a factor of 3 to 4 compared to a smooth-wall tube, while the friction factor increases by a factor of 3.5 to 4.4. These findings can be very useful in the design of more efficient heat exchangers.
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Kim, Nae-Hyun, M. G. Go, and H. S. Han. "CONDENSATION AND TUBE-SIDE HEAT TRANSFER OF CORRUGATED TUBES FOR STEAM CONDENSERS." In International Heat Transfer Conference 16. Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihtc16.cod.022824.

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Ismail, Salman M., Mohammed M. Rashwan, and Saud Ghani. "Experimental and Numerical Investigation of Various Tube Geometries for Improved Heat Transfer in Solar Central Receivers." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20139.

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Abstract Central receiver of Concentrated Solar Power technology constitutes 15% of the total initial cost and plays an important role in achieving high operating temperatures. Central receiver systems are composed of tubes with heat transfer fluid flowing inside that transports heat from radiation on the outer wall of tubes. This work investigates radiation heat transfer to fluid in tubes of various geometries. Experimental and numerical analysis were conducted to observe the boundary layer temperatures, bulk fluid temperatures, and fluid mixing near the tube walls. Four different samples of corrugated tubes adopted from literature were compared to a circular tube and a generic tube designed to provide larger surface area exposed to radiation without corrugation. The circular tube had high temperature in the boundary layer but low bulk fluid temperature due to lack of fluid mixing at wall. A spirally corrugated tube was found to have the highest bulk fluid temperature due to turbulent mixing and low temperature at boundary layer. The generic tube had higher bulk temperature compared to circular tube and two other corrugated tubes.
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Laohalertdecha, Suriyan, and Somchai Wongwises. "Effects of Pitch and Depth on the Condensation Heat Transfer of R-134a Flowing Through Corrugated Tubes." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44262.

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The effects of pitch and depth on the condensation heat transfer of R-134a flowing inside corrugated tubes are experimentally investigated. The test section is a horizontal tube-in-tube heat exchanger. The refrigerant flows in the inner tube and the water flows in the annulus. The length of heat exchanger is 2 m. A smooth tube and corrugated tubes having inner diameters of 8.7 mm are used as an inner tube. The corrugation pitches used in this study are 5.08, 6.35, and 8.46 mm. Similarly, the corrugation depths are 1, 1.25, and 1.5 mm. The effects of corrugation pitch and depth on tube wall temperature, heat transfer coefficient and frictional pressure drop are discussed. The results illustrate that the maximum heat transfer coefficient and frictional pressure drop obtained from the corrugated tube are up to 50% and 70% higher than those obtained from the smooth tube, respectively.
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Kim, Jeong-Ho, Linhui Zhang, Jefferson T. Wright, Rainer Hebert, and Arun Shukla. "Dynamic Response of Corrugated Sandwich Plates Under Shock Tube Loading." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63522.

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This paper addresses three-dimensional dynamic finite element analysis and validations for strain-rate dependent elastic-plastic sandwich steel plate with various corrugated core arrangements subjected to dynamic air pressure loads. The sandwich steel plate consists of top and bottom flat substrates of Steel 1018 and corrugated core layers of Steel 1008. The developed model is validated with a set of shock tube experiments. Various corrugated core arrangements are taken into consideration for optimizing core design parameters in order to maximize mitigation of blast load effects onto the structure.
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Boa, Nathan Fonte, and Marcos Paulo Del Passo. "CORRUGATED TUBE (PA11) INSERTION ON A HYDRAULIC PORT (FIR-TREE)." In XXI Simpósio Internacional de Engenharia Automotiva. Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/engpro-simea-pap72.

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Fan, Ya-Xian, Dan Xu, Lu Zhang, and Zhi-Yong Tao. "Manipulation of Guided Wave Mode in a Corrugated Terahertz Tube." In International Symposium on Ultrafast Phenomena and Terahertz Waves. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/isuptw.2016.iw3b.3.

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Mineo, Mauro, Claudio Paoloni, Aldo Di Carlo, Anna Maria Fiorello, and Massimiliano Dispenza. "Corrugated waveguide slow-wave structure for THz travelling wave tube." In 2009 39th European Microwave Conference (EuMC). IEEE, 2009. http://dx.doi.org/10.23919/eumc.2009.5296183.

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Belfroid, Stefan P. C., Donald P. Shatto, and Rene M. C. A. M. Peters. "Flow Induced Pulsations Caused by Corrugated Tubes." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26503.

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Corrugated tubes can produce a tonal noise when used for gas transport, for instance in the case of flexible risers. The whistling sound is generated by shear layer instability due to the boundary layer separation at each corrugation. This whistling is examined by investigating the frequency, amplitude and onset of the pulsations generated by 2" artificially corrugated tubes and cable feeds. Special attention is given to the influence of the geometry of the corrugations and to the influence of the boundary conditions of the tubes. Two distinct modes are measured. One high mode with a typical Strouhal number Sr = 0.35 and one with a Strouhal number of Sr = 0.1. The relative length scale for the corrugations to be used in the Strouhal number is a modified gap width, which is the gap width excluding the downstream edge radius. The exact Strouhal number for a corrugation is furthermore dependent on details of the corrugation, as the convective velocity of the flow disturbances is influenced by details in the geometry such as edge rounding. The amplitude of the generated pulsations scales with the acoustic pressure (ρcU) and will saturate for higher flow rates (p′/ρcU = constant). The saturation level is independent of pressure and tube length and is solely dependent on the corrugation geometry. Larger cavities will generate higher amplitude pulsations. The onset of the whistling is dependent on the tube itself and the system boundaries. Only for very long tubes is the onset insensitive to the system boundaries and will the onset be determined by corrugations. In that case the onset is determined by a critical boundary layer thickness. For smaller tubes, this critical layer thickness is still relevant, but the boundary conditions will have a large effect. A system with a high reflection coefficient will start at lower gas velocities than a system with a low reflection coefficient. Based on the current results the frequency and amplitude of the pulsations can be predicted.
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Reports on the topic "Corrugated tube"

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Shimizu, Yuki, Dai-heng Chen, and Kuniharu Ushijima. Axial Compression of Corrugated Square Tubes. Warrendale, PA: SAE International, May 2005. http://dx.doi.org/10.4271/2005-08-0232.

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