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研究生:洪銘聰
研究生(外文):Ming-Tsung Hung
論文名稱:具渦流產生器之波浪通道流場觀測
論文名稱(外文):Visualization of Flow Field Having Vortex Generators on Herringbone Wavy Channels
指導教授:葉榮華葉榮華引用關係廖世平廖世平引用關係
學位類別:碩士
校院名稱:國立海洋大學
系所名稱:航運技術研究所
學門:運輸服務學門
學類:運輸管理學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:94
中文關鍵詞:流場渦流產生器
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本論文主要目的在於觀測具對稱三角翼與三角翼渦流產生器波浪通道流場與摩擦性能,波浪角度分成15°與30°通道與平板通道,實驗範圍從雷諾數300到雷諾數2100。平板於整個測試範圍均為層流流動,在30°第一波浪逆風面有回流的情形,在15°第一個波浪並未發現這種現象。在30°波浪通道有一個非常特別的現象,染料在第二個波浪逆風面有溢流與回轉發生,相同的狀況在15°波浪通道雷諾數1000發生。
在未安裝渦流產生器之前壓降隨著波浪角度而增加,壓降的增加與回流現象及強大的紊流混合有直接的關係。
在安裝對稱三角翼渦流產生器之後發現,tp-2與tri-2有較佳的混合特性。而安裝三角翼渦流產生器以tm-4最佳。在本實驗當中又以tri-2所提升的混合特性最多,而壓降相較於θ=30°約成長了10%。
This study presents visual observation and frictional performance of the wavy channel at symmetric winglet and winglet type vortex generator. Two wavy channels having corrugation angles of 15 and 30 degrees and a plain channel were examined in the study. The observed range is from Re=300 to Re=2100. For plain channel, laminar flow prevails throughout the test range. A detectable flow re-circulation is seen at the leeside of the wavy channel for 15 degree. This phenomenon is seen even in the first corrugation but is not seen for 15 degree. A very special phenomenon of the spilt and turn around of the dye steak located at the leeward of the second corrugation is observed.
Without vortex generator, the pressure drop of the wavy channel increases significantly with the corrugation angle. The significant increase of the pressure drop is directly linked to the presence of flow-recirculation and the strong turbulence mixing caused by the corrugation.
With symmetric winglet type vortex generator, the increases in the mixing phenomeon at tp-2 and tri-2 are dramatically. Among the winglet type vortex generators,tm-4 is show the best than all others. In this experimental study, tri-2 is the best among all and the ratio of pressure drop is increased to about 10%,compared to the corrugation of θ=30°。
第一章、序論
第二章、文獻回顧
第三章、實驗系統設備與過程
第四章、結果與討論
第五章、結論
[1] A. M. Jacobi and R. K. Shah, 1995, Heat transfer surface enhancement through the use of longitudinal vortices : A review of recent progress, Experimental Thermal and Fluid Science, 11, pp.295~309.
[2] ESDU 93024, Engineering Science Data Unit, 1993, Vortex Generators of Control of Shock-Induced Separation Part 1: Introduction and Aerodynamics
[3] Jeffery P. Bons, Rolf Sondergaard and Richard B. Rivir, 2001, Turbine separation control using pulsed vortex generator jets, Transaction of the ASME, pp.198~206
[4] Chi-Chuan Wang, 2000, Technology Review-A survey of recent patents of fin-and-tube heat exchanger, Enhanced Heat Transfer, vol.7, pp.333~345.
[5] M. M. Ali and S.Ramadhyanu,1992, Experimental on convective heat transfer in corrugated channels, Experimental Heat Transfer, vol.5, pp.175~193.
[6] C. C. Wang, W. L. Fu and C. T. Chang, 1997, Heat transfer and friction characteristics of typical wavy fin-and-tube heat exchangers, Experimental Thermal and Fluid Science, 14, pp.174~186.
[7] Giovanni Lozza and Umberto Merlo, 2001, An experimental investigation of heat transfer and friction losses of interrupted and wavy fins for fin-and-tube heat exchanger, Int. J. of Refrigeration, pp.409~416.
[8] S. F. Tsai, T.W. H. Sheu and S. M. Lee, 1999, Heat Transfer in a conjugate heat exchanger with a wavy fin surface, Int. J. of Heat and Mass Transfer, 42, pp.1735~1745.
[9] Hie Chan Kang and Ralph L. Webb, 1998, Evaluation of the wavy geometry used in air-cooled finned-tube heat exchangers, Heat transfer vol.6 Proceedings of 11th IHTC, pp.95~100.
[10] M. Fiebig, 1998, Vortices, generators and heat transfer, Trans IChem, vol.76, pp.108~123.
[11] Martin Fiebig, 1995, Embedded vortices in internal flow: heat transfer and pressure loss enhancement, Int. J. Heat and Fluid Flow, 16, pp.376~388.
[12] Kataoka, K.,Doi, H and Komai,T., 1997, Heat/mass transfer in taylor vortex flowwith constant axial flow rates, Int. J. Heat Mass Transfer, 20, pp.27~63.
[13] C. S. Subramanian, P. M. Ligrani and M. F. Tuzzolo, 1992, Surface heat transfer and flow properties of vortex arrays induced artificially and from centrifugal instabilities, Int. J. Heat and Fluid Flow, vol.13, pp.210~223.
[14] S. Y. YOO, D. S. Park, M. H. Chung and J. K. Kim, 2001, Heat transfer characteristics of fin-tube heat exchanger with vortex generators, Proc. of 3rd Int. Conf. On Compact Heat Exchangers and Enhancement Technology for Process Industries, Davas, Switzerland, pp.49~55.
[15] Jurandir Itizo Yanagihara and kahoru Torii, 1990, Heat transfer characteristic of laminar boundary layers in the presence of vortex generators, Heat Transfer, vol.6, pp.323~328
[16] Chi-Chuan Wang, Jerry Lo, Yur-Tsai Lin and Min-sheng Liu, 2002, Flow visualization of wave-type vortex generators having inline fin-tube arrangement, Int. J. of Heat and Mass Transfer, pp.1933~1944
[17] Giovanni Tanda, 2001, Heat transfer and pressure drop in a rectangular channel with diamond-shaped elements, Int. J. of Heat and Mass Transfer,45, pp.3529~3541.
[18] A. Y. Turk and G. H. Junkhan, 1986, Heat transfer downstream of vortex generator on a flat plate, Heat Transfer, vol.6, pp.2903~2908.
[19] M. Fiebig, P. Kallweit and N. K. Mitra, 1986, Wing type vortex generators for heat transfer enhancement, Heat Transfer vol.6, pp2909~2913.
[20] Jurandir Itizo Yanagihara and kahoru Torii, 1992, Enhancement of laminar boundary layer heat transfer by a vortex generator, Int. J. of JSME, vol.35, No.3, pp.400~405.
[21] St. Tiggelbeck,N. K. Mitra and M. Fiebig, 1994,Comparision of wing-type vortex generators for heat transfer enhancement in channel flows, Transaction of the ASME vol.116, pp.880~885.
[22] Matrin Fiebig, 1995, Vortex Generator for compact heat exchangers, J. of Enhanced Heat Transfer, vol.2, pp.43~61.
[23] Rogerio Rodrigues, JR. and Jurandir Itizo Yanagihara, 1999, Augmentation of heat transfer by longitudinal vortices in plate-fin heat exchangers with two rows of tubes, Proc. 5th ASME/JSME Joint Thermal Engineering Conf., pp.1~9.
[24] James E. O’Brien and Manohar S. Sohal, 2000, Heat transfer enhancement for finned-tube heat exchangers with winglets, HID-vol.365/PID-vol.4 Advances in Enhanced Heat Transfer ASME, pp.137~146.
[25] G. Biswas and H. Chattopadhyay, 1992, Heat transfer in a channel with built-in wing-type vortex generators, Int. J. Heat Mass transfer, vol.35, No.4, pp.803~814.
[26] St. Tiggelbeck, N. K. Mitra and Fiebig, 1993, Experimental investigations of heat transfer enhancement and flow losses in a channel with double rows of longitudinal vortex generators, Int. J. Heat Mass Transfer, vol.36, No.9, pp.2327~2337.
[27] Stefan Tiggelbeck, Nimal Mitra and Martin Fiebig, 1992, Flow structure and heat transfer in a channel with multiple longitudinal vortex generators, Experimental Thermal and Fluid Science, 5, pp.425~436.
[28] G. Biswas, K. Torii, D. Fujii and K. Nishino, 1996, Numerical and experimental determination of flow structure and heat transfer effect of longitudinal vortices in a channel flow, Int. J. Heat Mass Transfer, vol.39, pp.3441~3451.
[29] Susanne Lan, 1995, Experimental study of the turbulent flow in a channel with periodically arranged longitudinal vortex generators, Experimental Thermal and Fluid Science, 11, pp.255~261.
[30] Y. Chen, M. Fiebig and N. Y. mitra, 2000, Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators, Int. J. of Heat and Mass transfer, 43, pp.417~435.
[31] Susanne Lau, 1995, Experimental study of the turbulent flow in a channel with periodically arranged longitudinal vortex generators, Experimental Thermal and Fluid Science, 11, pp.255~261.
[32] Martin Fiebig, Peter Kallweit, Nimai Mitra and Stefan Tiggelbeck, 1991, Heat transfer enhancement and drag by longitudinal vortex generators in channel flow, Experimental Thermal Fluid Science, 4, pp.103~114.
[33] J. X. Zhu, M. Fiebig and N. K. Mitra, 1995, Numerical investigation of turbulent flows and heat transfer in a rib-roughened channel with longitudinal vortex generators, Int. J. Heat Mass Transfer, vol.38, pp.495~501.
[34] Moffat, R. J., 1988, Describing the Uncertainties in Experimental Results, Experimental Thermal and Fluid Science, Vol.1, pp.3-17
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