A Study of Film Cooling and Heat Transfer Optimization for Double-Rim Squealer Tip

QIN Zheng; HE Kun; YAN Xin

doi:10.7652/xjtuxb202401006

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A Study of Film Cooling and Heat Transfer Optimization for Double-Rim Squealer Tip

更新时间：2025-05-13

- A Study of Film Cooling and Heat Transfer Optimization for Double-Rim Squealer Tip
- Vol. 58, Issue 1, Pages: 68-80(2024)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202401006
  CLC： TK47
- Online First：10 January 2024，
  
  Published：2024
- 稿件说明：
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QIN Zheng, HE Kun, YAN Xin. A Study of Film Cooling and Heat Transfer Optimization for Double-Rim Squealer Tip[J]. 2024, 58(1): 68-80.
DOI：

QIN Zheng, HE Kun, YAN Xin. A Study of Film Cooling and Heat Transfer Optimization for Double-Rim Squealer Tip[J]. 2024, 58(1): 68-80. DOI： 10.7652/xjtuxb202401006.

摘要

为改善航空发动机透平第一级凹槽叶顶的冷却传热性能

利用自编程序搭建了凹槽叶顶的优化设计平台。采用三阶多项式响应面模型和Hooke-Jeeves模式搜索算法的组合优化策略

获得了一种具有优良气热性能的透平级双肩臂凹槽叶顶结构

并将优化结果与传统凹槽叶顶、4种典型双肩臂凹槽叶顶的传热和冷却性能进行了对比

分析了内肩臂的几何参数对凹槽叶顶流场结构和冷却传热性能的影响

评估了双肩臂凹槽叶顶冷却传热性能对设计变量的敏感性。结果表明:优化后的内肩臂分为上下两层; 合理的内肩臂几何参数可有效降低泄漏流的冲击作用

有利于冷却流在内外凹槽区域形成良好的覆盖; 与传统凹槽叶顶相比

优化后的双肩臂凹槽叶顶的平均传热系数下降了24.96%

平均气膜冷却效率上升了5.38%; 叶顶平均传热系数对内肩臂下层的高度最为敏感

叶顶平均气膜冷却效率对内肩臂上层的起始位置更加敏感

而内肩臂上层的高度对双肩臂凹槽叶顶的冷却传热性能影响相对较小。

Abstract

To improve the film cooling and heat transfer performance on the squealer tip of the first turbine stage in aero-engines

a design platform for optimization was constructed using a self-developed program

aiming at enhancing the film cooling effectiveness and minimizing heat transfer on the squealer tip. The Hooke-Jeeves searching algorithm combined with the third-order response surface model was utilized to find a proper double-rim squealer tip geometry with excellent aero-thermal performance. Additionally

a comparative analysis was conducted to assess the heat transfer and film cooling effects of the optimized double-rim squealer tip against those of the conventional squealer tip as well as four commonly used double-rim squealer tips. The study also investigated the influence of various geometrical parameters for inner-rim on the flow structures

heat transfer and film cooling effectiveness in the tip region

and involved evaluating the sensitivities of heat transfer and film cooling performance on the double-rim squealer tip to various design variables. The findings indicated that the optimized configuration of the inner rim in the double-rim squealer tip consisted of two layers

an upper and a lower layer. The selection of appropriate geometrical parameters for the inner rim resulted in a reduction of the impingement effect caused by the leakage flow

providing effective coolant coverage on the internal and external squealer cavities. In comparison to the conventional squealer tip

the optimized double-rim squealer tip showcased a 24.96% reduction in the area-averaged heat transfer coefficient and a 5.38% enhancement in the area-averaged film cooling effectiveness. The height of the lower layer in the inner rim had the most significant impact on the area-averaged heat transfer coefficient

while the starting location of the upper layer in the inner rim played a crucial role in the area-averaged film cooling effectiveness among the studied parameters. On the other hand

the height of the upper layer in the inner rim exhibited a relatively minor influence on the film cooling and heat transfer performance of the double-rim squealer tip.

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references

BUNKER R S. Axial turbine blade tips: function, design, and durability [J]. Journal of Propulsion and Power, 2006, 22(2): 271-285.

HAN J C, DUTTA S, EKKAD S. Gas turbine heat transfer and cooling technology [M]. 2nd ed. Boca Raton, FL, USA: CRC Press, 2013.

CERNAT B C, PÁTÝ M, DE MAESSCHALCK C, et al. Experimental and numerical investigation of optimized blade tip shapes: part I turbine rainbow rotor testing and numerical methods [J]. Journal of Turbomachinery, 2019, 141(1): 011006.

PÁTÝ M, CERNAT B C, DE MAESSCHALCK C, et al. Experimental and numerical investigation of optimized blade tip shapes: part II tip flow analysis and loss mechanisms [J]. Journal of Turbomachinery, 2019, 141(1): 011007.

CERNAT B C, LAVAGNOLI S. Experimental investigation of tip design effects on the unsteady aerodynamics and heat transfer of a high speed turbine [J/OL]. Journal of Turbomachinery, 2021: Tubro-20-1377 [2023-06-13]. https://doi.org/10.1115/1.4050443.

DE MAESSCHALCK C, LAVAGNOLI S, PANIAGUA G. Blade tip shape optimization for enhanced turbine aerothermal performance [J]. Journal of Turbomachinery, 2013, 136(4): 041016.

YAN Xin, YU Jinxing, HE Kun. Modifications of double-rim geometry to improve thermal performance of squealer tip in a turbine stage [J]. Proceedings of the Institution of Mechanical Engineers: Part A Journal of Power and Energy, 2023, 237(6): 1203-1219.

BUCCHIERI G, GALBIATI M, COUTANDIN D, et al. Optimisation techniques applied to the design of gas turbine blades cooling systems [C]//ASME Turbo Expo 2006: Power for Land, Sea, and Air. New York, USA: ASME, 2006: 1395-1405.

DAWES W N, KELLAR W P, RICHARDSON G A. Application of topology-free optimization to manage cooled turbine tip heat load [C]//ASME Turbo Expo 2009: Power for Land, Sea, and Air. New York, USA: ASME, 2009: 533-543.

KANG Y S, RHEE D H, KIM C T, et al. Aerodynamic optimization of axial turbine tip cavity with approximation model [C]//ASME 2013 Turbine Blade Tip Symposium. New York, USA: ASME, 2013: V001T01A005.

SCHABOWSKI Z, HODSON H, GIACCHE D, et al. Aeromechanical optimization of a winglet-squealer tip for an axial turbine [J]. Journal of Turbomachinery, 2014, 136(7): 071004.

李琛玺, 郭振东, 宋立明, 等. 凹槽状叶顶气膜孔优化设计与知识挖掘 [J]. 推进技术, 2019, 40(2): 276-284.

LI Chenxi, GUO Zhendong, SONG Liming, et al. Film-cooling holes design optimization and knowledge mining of a squealer tip [J]. Journal of Propulsion Technology, 2019, 40(2): 276-284.

LI Chenxi. Aerothermal performance analysis and knowledge discovery of film holes on the squealer tip of a gas turbine blade [J]. International Journal of Thermal Sciences, 2023, 186: 108114.

DE MAESSCHALCK C, ANDREOLI V, PANIAGUA G, et al. Aerothermal optimization of turbine squealer tip geometries with arbitrary cooling injection [J]. Journal of Turbomachinery, 2021, 143(11): 111010.

VINCEKOVIC L, JOHN A, QIN Ning, et al. Exploring topology optimization for high pressure turbine blade tips [J]. Journal of Turbomachinery, 2022, 144(7): 071013.

MARAL H, ALPMAN E, KAVURMACIOGˇLU L, et al. A genetic algorithm based aerothermal optimization of tip carving for an axial turbine blade [J]. International Journal of Heat and Mass Transfer, 2019, 143: 118419.

ZHOU Zhihua, CHEN Shaowen, WANG Songtao. Aerodynamic optimisation of a winglet-cavity tip in a high-pressure axial turbine cascade [J]. Proceedings of the Institution of Mechanical Engineers: Part G Journal of Aerospace Engineering, 2018, 232(4): 649-663.

CALONI S, SHAHPAR S, COULL J D. Numerical investigations of different tip designs for shroudless turbine blades [J]. Proceedings of the Institution of Mechanical Engineers: Part A Journal of Power and Energy, 2016, 230(7): 709-720.

MARAL H, şENEL C B, DEVECI K, et al. A genetic algorithm based multi-objective optimization of squealer tip geometry in axial flow turbines: a constant tip gap approach [J]. Journal of Fluids Engineering, 2020, 142(2): 021402.

HALILA E E, LENAHAN D T, THOMAS T T. High pressure turbine test hardware detailed design report [R/OL].(1982-06-01)[2023-05-01]. https://searchworks.standford.edu/view/12755983.

KWAK J S, HAN J C. Heat transfer coefficients on the squealer tip and near squealer tip regions of a gas turbine blade [J]. Journal of Heat Transfer, 2003, 125(4): 669-677.

KWAK J S, HAN J C. Heat transfer coefficients and film cooling effectiveness on the squealer tip of a gas turbine blade [J]. Journal of Turbomachinery, 2003, 125(4): 648-657.

吴琛琦, 何坤, 晏鑫. 透平级带压力侧小翼凹槽叶顶的传热与气膜冷却性能研究 [J]. 西安交通大学学报, 2022, 56(3): 147-159.

WU Chenqi, HE Kun, YAN Xin. Investigation into heat transfer and film cooling performance at pressure-side winglet-squealer tip in a turbine stage [J]. Journal of Xi'an Jiaotong University, 2022, 56(3): 147-159.

于金杏, 叶明亮, 何坤, 等. 压力侧冷却流对凹槽叶顶气膜冷却与传热性能的影响 [J]. 西安交通大学学报, 2022, 56(3): 160-172.

YU Jinxing, YE Mingliang, HE Kun, et al. Effect of pressure-side cooling flow on film cooling and heat transfer performance at squealer tip [J]. Journal of Xi'an Jiaotong University, 2022, 56(3): 160-172.

于金杏, 叶明亮, 晏鑫. 发动机工况下透平级凹槽叶顶冷却传热性能研究 [J]. 西安交通大学学报, 2021, 55(7): 106-116.

YU Jinxing, YE Mingliang, YAN Xin. Investigations on the heat transfer and film cooling effect at squealer tip of a turbine stage under engine conditions [J]. Journal of Xi'an Jiaotong University, 2021, 55(7): 106-116.

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