叶尖间隙控制系统悬浮管换热单元数值研究

推进技术 ›› 2019, Vol. 40 ›› Issue (2): 389-397.

叶尖间隙控制系统悬浮管换热单元数值研究

张扬,毛军逵,刘远见,李睿,刘兆颖

南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016

发布日期:2021-08-15
作者简介:张扬，硕士生，研究领域为发动机传热传质。E-mail: zyturbo@163.com 通讯作者:毛军逵，博士，教授，研究领域为航空宇航推进理论与工程。

Numerical Study of Suspending Tube Heat Transfer Unit for a Blade Tip Clearance Control System

College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China and College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

Published:2021-08-15

摘要/Abstract

摘要： 为了改善机匣内横流影响，提高冷气的热沉利用效果，设计了一种叶尖间隙控制系统新型悬浮管式冷却结构，并抽象出典型换热单元开展数值模拟研究。重点关注了悬浮管上冷却孔冲击雷诺数、冲击孔间距、冷却空气出流方式等对该冷却结构流动换热特性的影响。研究中发现:悬浮管相邻冲击射流之间会相互影响并形成“喷泉流”现象；随着悬浮管冷却孔冲击雷诺数减小、冲击孔间距增大，冲击靶面换热效果降低，“喷泉流”现象不再明显。同时由于悬浮管本体及盖板的空间限制作用，冲击腔中会形成沿周向、轴向的横流。研究结果表明，当机匣侧方位冷气出流时，机匣表面沿轴向的横流最为明显。相较于机匣侧面出流，盖板垂直出流以及盖板垂直/机匣侧面同时出流时，两高肋之间区域的换热得到明显加强。其中垂直出流时增幅最大，可达20%。

关键词: 间隙控制；冲击换热；出流方式；横流；肋化表面

Abstract: To improve the effects of cross-flow and the usage of coolant heat sinks， the numerical simulation is carried out in the present study for a typical heat transfer unit in a new type of suspending tube cooling structure of a blade tip clearance control system. The effects of some key parameters are studied on the heat transfer characteristics of the cooling structure， such as the impinging Reynolds number， distance of jet to jet and outflow type. It is found that a phenomenon of ‘fountain flow’ appears formed by the interaction of adjacent impinging jets of suspending tubes. With decreasing the impinging Reynolds number and increasing the distance of jet to jet， the heat transfer on the target is weakened and the phenomenon of ‘fountain flow’ is no more significant. Due to the space limitation caused by the suspending tubes and the cover plate， the circumferential and axial cross-flows are formed in impinging chamber. When the coolant flow exits from the side of the case， the axial cross-flow is most significant on the casing surface. Compared to the outflow from the side of the case， the heat transfer between the two high ribs is enhanced considerably when the outflow is from the top of the case， or from both the top and the side of the case. A maximum increase is up to around 20% when the outflow is from the top.

Key words: Clearance control；Impinging jet heat transfer；Outflow type；Cross-flow；Ribbed surface

张扬,毛军逵,刘远见,李睿,刘兆颖. 叶尖间隙控制系统悬浮管换热单元数值研究[J]. 推进技术, 2019, 40(2): 389-397.

ZHANG Yang,MAO Jun-kui,LIU Yuan-jian,LI Rui,LIU Zhao-ying. Numerical Study of Suspending Tube Heat Transfer Unit for a Blade Tip Clearance Control System[J]. Journal of Propulsion Technology, 2019, 40(2): 389-397.

参考文献

[1] Lattime Scott B, Steinetz Bruce M. Turbine Engine Clearance Control Systems: Current Practices and Future Directions[R]. NACA-TM-2002-211794.
[2] 张井山, 毛军逵, 李毅. 高压涡轮主动间隙控制机匣内部换热特性试验[J]. 航空动力学报, 2014, 29(2): 298-304.
[3] 刘震雄, 毛军逵, 江华. 多层涡轮机匣内螺栓对换热特性影响的试验研究[J]. 推进技术, 2017, 38(7):1441-1449. (LIU Zhen-xiong, MAO Jun-kui, JIANG Hua. Experimental Study of Effects of Bolts Inside Multilayer Turbine Casing on Heat Transfer Characteristic[J]. Journal of Propulsion Technology, 2017, 38(7):1441-1449.)
[4] Goldstein R J, Franchett M E. Heat Transfer from a Flat Surface to an Oblique Impinging Jet[J]. Journal of Heat Transfer, 1988, 110(1): 84-90.
[5] O’Donovan T S, Murray D B. Fluctuating Fluid Flow and Heat Transfer of an Obliquely Impinging Air Jet[J].International Journal of Heat & Mass Transfer, 2008, 51(25–26): 6169–6179.
[6] 单文娟, 毛军逵, 李毅, 等. 斜向冲击强化换热特性试验[J]. 航空动力学报, 2013, 28(3): 701-708.
[7] Huang Y, Ekkad S V, Han J C. Detailed Heat Transfer Coefficient Distributions under an Array of Inclined Impinging Jets Using a Transient Liquid Crystal Technique[C]. Singapore: 9th International Symposium on Transport Phenomena in Thermal Fluids Engineering, 1996.
[8] Soghe R D, Andreini A. Numerical Characterization of Pressure Drop Across the Manifold of Turbine Casing Cooling System[J]. Journal of Turbomachinery, 2013, 135(3): 1-9.
[9] Andreini A, Soghe R D, Facchini B, et al. Experimental and Numerical Analysis of Multiple Impingement Jet Arrays for an Active Clearance Control System[J]. Journal of Turbomachinery, 2013, 135(3): 287-299.
[10] 姜远刚, 毛军逵, 李毅, 等. 间隙主动控制系统中冷却空气管换热特性实验研究[J]. 推进技术, 2014, 35(3):366-371. (JIANG Yuan-gang, MAO Jun-kui, LI Yi, et al. Experimental Studies on Heat Transfer Characteristics in Air Cooling Pipe of Turbine Tip Clearance Control System[J]. Journal of Propulsion Technology, 2014, 35(3): 366-371.)
[11] Mao Junkui, Yao Tian, Han Xingsi, et al. Numerical Study of the Radiation Effect on the Jet Array Impinging Heat Transfer in a Feeding Pipe[J]. Numerical Heat Transfer Applications, 2018, 73(2): 125-142.
[12] Liu Fangyuan, Mao Junkui, Han Xingsi. Heat Transfer of Impinging Jet Arrays on a Ribbed Surface[J]. Journal of Thermophysics and Heat Transfer, 2018, 32(1): 1-11.
[13] Waehayee M, Tekasakul P, Eiamsaard S, et al. Flow and Heat Transfer Characteristics of in-Line Impinging Jets with Cross-Flow at Short Jet-to-Plate Distance[J]. Experimental Heat Transfer, 2015, 28(6): 511-530.
[14] 张泽远, 张靖周, 杨卫华. 半封闭通道射流冲击换热特性的实验[J]. 航空动力学报, 2006, 16(4): 626-630.
[15] Wang T, Lin M, Bunker R S. Flow and Heat Transfer of Confined Impingement Jets Cooling Using a 3-D Transient Liquid Crystal Scheme[J]. International Journal of Heat & Mass Transfer, 2005, 48(23–24): 4887-4903.
[16] Zuckerman N, Lior N. Jet Impingement Heat Transfer: Physics, Correlations, and Numerical Modeling[J]. Advances in Heat Transfer, 2006, 39(6): 565-631.
[17] Zuckerman N, Lior N. Impingement Heat Transfer: Correlations and Numerical Modeling[J]. Journal of Heat Transfer, 2005, 127(5): 544-552.(编辑:史亚红)　　　　　　　　　　　　　　收稿日期:2018-01-26；修订日期:2018-03-26。作者简介:张扬,硕士生,研究领域为发动机传热传质。E-mail: zyturbo@163.com通讯作者:毛军逵,博士,教授,研究领域为航空宇航推进理论与工程。E-mail: mjkpe@nuaa.edu.cn