克努森数对气膜冷却流动换热相似特性的影响

龚代坤; 朱惠人; 刘存良; 卢聪明

doi:10.13224/j.cnki.jasp.2015.05.011

克努森数对气膜冷却流动换热相似特性的影响

doi: 10.13224/j.cnki.jasp.2015.05.011

1. 西北工业大学动力与能源学院, 西安 710072;
2. 中国航空工业集团公司中国航空动力机械研究所, 湖南株洲 412002

基金项目:

中央高校基本科研业务费专项资金(3102014JCQ01049)

霍英东教育基金(141053)

航空科学基金(2014ZB53023)

国家自然科学基金(51306152)

详细信息

作者简介:
龚代坤(1989-),男,重庆人,硕士生,主要从事航空发动机气膜冷却流动与换热特性研究.

中图分类号: V231.1
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出版历程
- 收稿日期: 2013-12-04
- 刊出日期: 2015-05-28

Effect of Knudsen number on similar characteristics of film cooling flow and heat transfer

1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072;
2. China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou Hunan 412002, China

摘要

摘要: 数值模拟研究克努森数Kn对不同尺度气膜冷却流动换热相似特性的影响,选取孔径为0.3,3,10mm平板单排圆柱形气膜孔模型,计算得到模型在Kn不同与相同条件下冷却效率和孔流量系数.结果表明:Kn相同时,小孔与大孔模型流动换热特性相似,冷却效率及流量系数均吻合很好;Kn不同时,两模型流动换热特性存在一定差异,冷却效率及流量系数吻合较差.因此为在气膜冷却相似放大研究中得到准确的相似结果,需要保证小孔及大孔模型的Kn相同.
- 气膜冷却 /
- 流动换热相似特性 /
- 克努森数 /
- 冷却效率 /
- 流量系数
Abstract: The effect of Knudsen number Kn on the similar characteristics between different scale film cooling flow and heat transfer was numerically studied. Single-row plate cylindrical hole film cooling models with aperture of 0.3, 3, 10mm were selected. Cooling effectiveness and discharge coefficient of models under condition of different Kn and the same Kn were calculated. Results show that small and large hole models have similar flow and heat transfer characteristics under the same value of Kn, resulting in little differences between cooling effectiveness and discharge coefficient. When Kn varies, the flow and heat transfer characteristics of these two models are different, bringing about different cooling effectiveness and discharge coefficients. Therefore it is necessary to make sure that small and large hole models should have the same Kn in similar amplification experiment of film cooling.
- film cooling /
- similar characterisitics of flow and heat transfer /
- Knudsen number /
- cooling effectiveness /
- discharge coefficient

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参考文献(18)

[1]	韩介勤, 桑地普·杜达, 斯瑞纳斯·艾卡德.燃气轮机传热和冷却技术[M].程代京, 谢永慧, 译.西安:西安交通大学出版社, 2005.
[2]	Leylek J H, Mcgovern K T, Brittingham R A.A detailed analysis of film cooling physics:Part Ⅱ compound-angle injection with cylindrical holes[J].Journal of Turbomachinery, 2000, 122(1):113-121.
[3]	Li S J, Yang S F, Han J C.Effect of coolant density on leading edge showerhead film cooling using PSP measurement technique[R].ASME Paper GT2013-94198, 2013.
[4]	Dong H R, Youn S L, Young B K, et al.Film cooling and thermal field measurements for staggered rows of rectangular-shaped film cooling holes[R].ASME Paper GT2003-38608, 2003.
[5]	刘存良, 朱惠人, 白江涛, 等.基于瞬态液晶全表面测量技术的圆柱形孔气膜冷却特性研究[J].航空动力学报, 2009, 24(9):1959-1965. LIU Cunliang, ZHU Huiren, BAI Jiangtao, et al.Experimental research on film cooling characteristics of cylindrical hole with transient liquid crystal measurement technique[J].Journal of Aerospace Power, 2009, 24(9):1959-1965.(in Chinese)
[6]	邓宏武, 肖俊, 李国庆, 等.吹风比对旋转涡轮叶片气膜冷却的影响[J].航空动力学报, 2011, 26(7):1452-1457. DENG Hongwu, XIAO Jun, LI Guoqing, et al.Influence of blowing ratio on film cooling of rotating turbine blade[J].Journal of Aerospace Power, 2011, 26(7):1452-1457.(in Chinese)
[7]	Papautsky I, Ameel T, Frazier A B.A review of laminar single-phase flow in microchannels[R].New York:ASME International Mechanical Engineering Congress and Exposition, 2001.
[8]	Kandlikar S G, Colin S, et al.Heat transfer in microchannels:2012 status and research needs[J].Journal of Heat Transfer, 2013, 135(9):091001.1-091001.18.
[9]	陶然, 权晓波, 徐建中.微尺度流动中的几个问题[J].工程热物理学报, 2001, 22(5):575-577. TAO Ran, QUAN Xiaobo, XU Jianzhong.Several quetions in research of micro scale flow[J].Journal of Engineering Theromophysics, 2001, 22(5):575-577.(in Chinese)
[10]	Eringen A C.Simple microfluids[J].International Journal of Engineering Science, 1964, 2(2):205-217.
[11]	Turner S E, Lam L C, Gregory O J.Experimental investigation of gas flow in microchannels[J].Journal of Heat Transfer, 2004, 126(5):753-763.
[12]	Wu P Y, Little W A.Measurement of friction factors for flow and gases in very fine channels used for microminiature joule-thomson refrigerators[J].Cryogenics, 1983, 23(5):273-277.
[13]	杜东兴, 李志信, 过增元.微细光滑管内的气体流动阻力特性[J].中国科学:E辑, 2000, 30(2):173-178. DU Dongxing, LI ZHixin, GUO Zengyuan.The characteristics of resistance for gas flow in microtubes[J].Science in China:Series E, 2000, 30(2):173-178.(in Chinese)
[14]	邬小波, 过增元.微细光滑管内气体的流动与传热特性研究[J].工程热物理学报, 1997, 18(3):326-330. WU Xiaobo, GUO Zengyuan.Investigation of gas flow and heat transfer in smooth microtubes[J].Journal of Engineering Themophysics, 1997, 18(3):326-330.(in Chinese)
[15]	唐桂华, 陶文铨, 赵长颖.微圆管进口区气体流动与换热特性研究[J].工程热物理学报, 2008, 29(1):130-132. TANG Guihua, TAO Wenquan, ZHAO Changyin.Gas flow and heat transfer characteristics in the entrance region of microtubes[J].Journal of Engineering Themophysics, 2008, 29(1):130-132.(in Chinese)
[16]	许艳芝, 朱惠人, 郑杰.克努森数在微尺度相似流动特性研究中的作用[J].航空动力学报, 2013.28(8):1752-1758. XU Yanzhi, ZHU Huiren, ZHENG Jie.Effect of Knudsen number on microscale similar flow character[J].Journal of Aerospace Power, 2013, 28(8):1752-1758.(in Chinese)
[17]	沈青.稀薄气体动力学[M].北京:国防工业出版社, 2003.
[18]	刘存良, 朱惠人, 白江涛.收缩-扩张形气膜孔提高气膜冷却效率的机理研究[J].航空动力学报, 2008, 23(4):598-604. LIU Cunliang, ZHU Huiren, BAI Jiangtao.Study on the physics of film-cooling effectiveness enhancement by the converging-expanding hole[J].Journal of Aerospace Power, 2008, 23(4):598-604.(in Chinese)