斜射流梯形腔内靶面的冲击冷却换热特性实验研究

推进技术 ›› 2014, Vol. 35 ›› Issue (3): 384-391.

斜射流梯形腔内靶面的冲击冷却换热特性实验研究

刘海涌^1,2,刘存良²,武文明¹,王魁¹

第二炮兵工程大学研究生旅,陕西西安 710025;西北工业大学动力与能源学院,陕西西安 710072;第二炮兵工程大学研究生旅,陕西西安 710025;第二炮兵工程大学研究生旅,陕西西安 710025

发布日期:2021-08-15
作者简介:刘海涌(1981—),男,博士后,研究领域为飞行器及发动机高温部件热防护技术。E-mail:helian_xicheng@163.com
基金资助:
国家自然科学基金资助项目(51206180)。

Experimental Investigation on Heat Transfer Characteristics on Target Wall in a Trapezoid Duct with Incline Impingement Jets

Postgraduate Brigade, Second Artillery Engineering University, Xi’an 710025, China;School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China;Postgraduate Brigade, Second Artillery Engineering University, Xi’an 710025, China;Postgraduate Brigade, Second Artillery Engineering University, Xi’an 710025, China

Published:2021-08-15

摘要/Abstract

摘要： 为了深入了解冲击冷却在涡轮叶片前缘的应用效果,建立了其附近梯形内冷通道的放大模型,对冲击冷却进行试验研究,测量腔内流场和壁面换热特性,在已掌握流动结构的基础上进行换热分析,更好地理解此类受限通道内冲击冷却的强化换热机理,为更高效的内冷通道设计提供参考。使用热电偶对通道靶面温度进行了详细测量,研究射流角度、横流和射流雷诺数对靶面换热努塞尔数的影响规律。结果表明:较低位置射流对靶面具有较强的冲击作用,而较高位置射流未对靶面形成冲击；射流入射角度的增加会提高较低位置射流在靶面上的冲击换热能力,对较高位置射流的换热没有明显影响；较强的横流将严重削弱靶面冲击区的换热能力,射流雷诺数的增加将大幅提高整个靶面上的换热能力；换热试验结果与前期研究的流场分析结论非常一致。 

关键词: 前缘;梯形腔;冲击冷却;横流;换热特性 

Abstract: A simplified trapezoidal duct was built up to imitate the internal cooling cavities utilized near the leading edge. An experimental research on the impingement cooling in the trapezoidal duct was conducted to understand the flow fields in the duct and heat transfer characteristics on the target wall. The experimental data of the heat transfer was analyzed combining with that of the flow field.It is helpful to understand the heat transfer mechanism inside such a kind of confined channel. It can also provide some useful information for the design of a more effective internal cooling structure. The temperature on the target wall was measured by the thermocouples. The effects of the impingement angle, the cross flow and the impingement Reynolds number on the Nusselt number on the target wall were considered. Important results of the research include:the lower impingement jets impinge the target wall effectively, the higher impingement jets fail. The increase of the impingement angle enhances the impingement cooling of the lower impingement jets but has no effect on those at higher position. A strong cross flow severely impairs the heat transfer on the target wall, but the increase of the impingement Reynolds number improves the heat transfer ability evidently on the entire target wall. The data of the heat transfer experiment agrees well with the flow field analysis shown in the previous research. 

Key words: Leading edge; Trapezoidal duct; Impingement cooling; Cross flow; Heat transfer characteristics

刘海涌,刘存良,武文明,王魁. 斜射流梯形腔内靶面的冲击冷却换热特性实验研究[J]. 推进技术, 2014, 35(3): 384-391.

LIU Hai-yong^1,2,LIU Cun-liang²,WU Wen-ming¹, WANG Kui¹. Experimental Investigation on Heat Transfer Characteristics on Target Wall in a Trapezoid Duct with Incline Impingement Jets[J]. Journal of Propulsion Technology, 2014, 35(3): 384-391.

参考文献

[1] Jenn-Jiang Hwang, Chung-Shen Cheng.Impingement Cooling In Triangular Ducts Using An Array of Side-entry Wall Jets[J].International Journal of Heat and Mass Transfer, 2001,4(5):1053-1063.
[2] Fenot M, Dorignac E, Vullierme J J.An Experimental Study on Hot Round Jets Impinging a Concave Surface[J].International Journal of Heat and Fluid Flow, 2008,9(4):945-956.
[3] Terekhov V I, Kalinina S V, Mshvidobadze Yu M, et al.Impingement of an Impact Jet onto a Spherical Cavity-Flow Structure and Heat Transfer[J].International Journal of Heat and Mass Transfer, 2009,2(11-12):2498-2506.
[4] Craft T J, Iacovides H, Mostafa N A.Modelling of Three-Dimensional Jet Array Impingement and Heat Transfer on a Concave Surface[J].International Journal of Heat and Fluid Flow, 2008,9(3):687-702.
[5] Yasaswy S Nagesh,Katti Vadiraj V, Prabhu S V.Heat Transfer Distribution of Semicylindrical Concave Surface Impinged by Circular Jet Rows[J].Journal of Thermophysics and Heat Transfer, 2010,4(4):765-776.
[6] Mangesh Chaudhari, Bhalchandra Puranik, Amit Agrawal.Heat Transfer Characteristics of Synthetic Jet Impingement Cooling[J].International Journal of Heat and Mass Transfer, 2010,3(5-6):1057-1069.
[7] Mangesh Chaudhari, Bhalchandra Puranik, Amit Agrawal.Effect of Orifice Shape in Synthetic Jet Based Impingement Cooling[J].Experimental Thermal and Fluid Science, 2010,4(2):246-256.
[8] Andrew Schroder, Shichuan Ou, Urmila Ghia.Experimental Study of an Impingement Cooling Jet Array Using an Infrared Thermography Technique[J].Journal of Thermophysics and Heat Transfer, 2012,6(4):590-597.
[9] Chambers A C, Gillespie R H.The Effect of Initial Cross Flow on the Cooling Performance of a Narrow Impingement Channel[J].ASME Journal of Heat Transfer, 2005,7(4):358-365.
[10] 刘钊, 丰镇平, 宋立明.实际叶片前缘冲击冷却流动和换热的数值研究[J].西安交通大学学报, 2011,5(1):5-9.
[11] 孙润鹏, 朱卫兵, 陈昌将,等.阵列射流冲击冷却传热特性的数值研究[J].热科学与技术, 2012,1(1):34-40.
[12] 杨通海, 朱惠人, 张丽,等.窄通道内冲击冷却局部换热特性的瞬态液晶测量[J].航空学报,2009,0(11):2031-2036.
[13] 徐磊, 常海萍, 潘金栋.旋转条件下带出流孔的受限空间内冲击换热[J].推进技术, 2008,9(2):149-152.(XU Lei, CHANG Hai-ping, PAN Jin-dong.Heat Transfer of Impingement in Limited Room Configuration with Effusion in Rotating State[J].Journal of Propulsion Technology, 2008,9(2):149-152.)
[14] 张镜洋, 常海萍, 徐磊.转子叶片径向受限的“冲击-气膜出流”冷却结构流动与换热[J].推进技术, 2011,2(1):125-129.(ZHANG Jing-yang, CHANG Hai-ping, XU Lei.Flow and Heat Transfer Characteristics of “Impingement-Film Cooling”Configuration in Limited Space of Rotating Blade[J].Journal of Propulsion Technology, 2011,2(1):125-129.)
[15] 刘海涌, 刘松龄, 强洪夫,等.涡轮叶片前缘附近斜射流梯形腔内的流动特性[J].推进技术, 2011,2(1):113-118.(LIU Hai-yong, LIU Song-ling, QIANG Hong-fu,et al.Flow Structure Measurement in a Trapezoid Duct with Incline Impingement Jets Near the Leading Edge[J].Journal of Propulsion Technology, 2011,2(1):113-118.)