有/无尾迹作用下低压涡轮叶栅分离边界层转捩的大涡模拟

刘志刚; 叶建; 邹正平

有/无尾迹作用下低压涡轮叶栅分离边界层转捩的大涡模拟

1.
西北工业大学动力与能源学院, 西安 710007
2.
重庆大学动力工程学院, 重庆 400044
3.
北京航空航天大学能源与动力工程学院, 北京 100191

基金项目: 国家自然科学基金（51206198）；中央高校基本科研业务费（CDJZR12140030）

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出版历程
- 收稿日期: 2013-05-12
- 刊出日期: 2013-12-28

Large-eddy simulation of separated boundary layer transition in low-pressure turbine cascade with and without wakes

1.
School of Power and Energy, Northwestern Polytechnical University, Xi'an 710007
2.
College of Power Engineering, Chongqing University, Chongqing 400044, China
3.
School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 采用经过大量算例验证的可压缩大涡模拟求解器对雷诺数为60154、马赫数为0.402的低压涡轮叶栅T106D-EIZ进行了细致模拟，计算了定常来流和周期性尾迹来流两种工况.对计算结果的分析表明：定常来流工况下，叶片吸力面后部出现大尺寸的层流分离泡，分离剪切层的转捩过程受Kelvin-Helmholtz （K-H）不稳定性控制；尾迹来流工况下，由于来流尾迹的周期性扫掠，时均分离泡尺寸变小，叶栅总压损失降低.对相位平均和瞬态流场的分析表明，尾迹引起的逆射流使分离点后移，形成卷起涡结构，逆射流掠过卷起涡的过程中与其发生强烈的相互作用，产生大量气动损失，而后卷起涡破碎，流动转捩为湍流.
- 低压涡轮 /
- 大涡模拟 /
- 尾迹/边界层相互作用 /
- 尾迹诱导转捩 /
- 卷起涡
Abstract: A well validated large-eddy simulation (LES) solver for compressible flows was employed to simulate the low pressure turbine (LPT) cascade T106D-EIZ where the Reynolds number and Mach number were 60154 and 0.402,respectively. Two cases with steady inflow and periodic wakes inflow were calculated and analyzed. The results of steady inflow case show that large separation bubble appears at the rear part of the blade suction surface and transition process of the separated shear layer is dominated by Kelvin-Helmholtz (K-H) instability. In the wakes inflow case, due to the periodic sweeping of inflow wakes, the size of time mean separation bubble significantly reduces and the total pressure loss of the cascade also decreases. The analysis of phase averaged and instantaneous flowfield reveals that the negative jet of wake-induced forces the separation point to move forward and then the roll-up vortex emerges. The strong interactions of sweeping negative jet and roll-up vortex result in large aerodynamic losses. Then roll-up vortex quickly breakdowns and boundary layer transitions to turbulence.
- low-pressure turbine /
- large-eddy simulation /
- wake-boundary layer interaction /
- wake-induced transition /
- roll-up vortex

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参考文献(23)

[1]	Hodson H P, Howell R J.The role of transition in high-lift low-pressure turbines for aeroengines[J].Progress in Aerospace Sciences, 2005, 41(6):419-454.
[2]	Gier J, Franke M, HÜbner N, et al.Designing low pressure turbines for optimized airfoil lift[J].Journal of Turbomachinery, 2010, 132(3):031008.1-031008.12.
[3]	Mayle R E.The role of laminar-turbulent transition in gas turbine engines[R].ASME Paper 91-GT-261, 1991.
[4]	Hodson H P, Howell R J.Bladerow interactions, transition, and high-lift aerofoils in low-pressure turbines[J].Annual Review of Fluid Mechanics, 2005, 37:71-98.
[5]	Volino R J.Separated flow measurements on a highly loaded low-pressure turbine airfoil[J].Journal of Turbomachinery, 2010, 132(1):011007.1-011007.10.
[6]	Dhnert J, Lyko C, Peitsch D.Transition mechanisms in laminar separated flow under simulated low pressure turbine aerofoil conditions[J].Journal of Turbomachinery, 2013, 135(1):011007.1-011007.10.
[7]	乔渭阳, 赵磊, 罗华玲, 等.低雷诺数涡轮叶片边界层转捩及分离特性测量[J].推进技术, 2012, 33(6):859-865. QIAO Weiyang, ZHAO Lei, LUO Hualing, et al.Measurement of the transition and separation for turbine blade boundary layer with low-Reynolds number[J].Journal of Propulsion Technology, 2012, 33(6):859-865.(in Chinese)
[8]	李伟, 朱俊强, 李钢, 等.基于表面热膜的超高负荷低压涡轮叶栅附面层特性[J].航空动力学报, 2011, 26(1):115-121. LI Wei, ZHU Junqiang, LI Gang, et al.Experimental research on boundary layer behaviors of ultra-high-lift low-pressure turbine profile based on surface-mounted hot-film[J].Journal of Aerospace Power, 2011, 26(1):115-121.(in Chinese)
[9]	Raverdy B, Mary I, Sagaut P, et al.High-resolution large-eddy simulation of flow around low-pressure turbine blade[J].AIAA Journal, 2003, 41(3):390-397.
[10]	Jagannathan S, Schwnen M, Duggleby A.Low pressure turbine relaminarization bubble characterization using massively-parallel large eddy simulations[J].Journal of Fluids Engineering, 2012, 134(2):021102.1-021102.13.
[11]	叶建, 邹正平.逆压梯度下层流分离泡转捩的大涡模拟[J].工程热物理学报, 2006, 27(3):402-404. YE Jian, ZOU Zhengping.Large-eddy simulation of laminar separation bubble transition under adverse pressure gradient[J].Journal of Engineering Thermophysics, 2006, 27(3):402-404.(in Chinese)
[12]	叶建.非定常环境中叶片边界层时空演化机制的大涡模拟[D].北京:北京航空航天大学, 2008. YE Jian.Large-eddy simulation of blade boundary layer spatio-temporal evolution under unsteady disturbances[D].Beijing:Beijing University of Aeronautics and Astronautics, 2008.(in Chinese)
[13]	Ducros F, Laporte F, Soulères T, et al.High-order fluxes for conservative skew-symmetric-like schemes in structured meshes:application to compressible flows[J].Journal of Computational Physics, 2000, 116(1):114-139.
[14]	Berland J, Bogey C, Marsden O, et al.High-order, low dispersive and low dissipative explicit schemes for multiple-scale and boundary problems[J].Journal of Computational Physics, 2007, 224(2):637-662.
[15]	叶建.复杂可压缩流动大涡模拟程序的若干改进[D].北京:北京航空航天大学, 2011. YE Jian.Some improvements on the large-eddy simulation solver for complex compressible flows[D].Beijing:Beijing University of Aeronautics and Astronautics, 2011.(in Chinese)
[16]	StadtmÜller P.Investigation of wake-induced transition on the LP turbine cascade T106D-EIZ, test case documentation version 11[D].Munich, Germany:University of the Federal Armed Forces, 2001.
[17]	StadtmÜller P, Fottner L.A test case for the numerical investigation of wake passing effects on a highly loaded LP turbine cascade blade.ASME Paper 2001-GT-0311, 2001.
[18]	陆宏志.叶轮机叶片前缘流动和前缘形状优化[D].北京:北京航空航天大学, 2003. LU Hongzhi.Flow around the leading edge of turbomachinery blading and improved design for leading edge shapes[D].Beijing:Beijing University of Aeronautics and Astronautics, 2003.(in Chinese)
[19]	Hodson H P, Dawes W N.On the interpretation of measured profile losses in unsteady wake-turbine blade interaction studies[J].Journal of Turbomachinery, 1998, 120(2):276-284.
[20]	Smith L H.Wake dispersion in turbomachines[J].Journal of Basic Engineering, 1966, 88:688-690.
[21]	Stieger R D, Hodson H P.The unsteady development of a turbulent wake through a downstream low-pressure turbine blade passage[R].ASME Paper GT-2004-53061, 2004.
[22]	Stieger R D, Hodson H P.The transition mechanism of highly-loaded LP turbine blades[R].ASME Paper GT-2003-38304, 2003.
[23]	Denton J D.Loss mechanisms in turbomachines[R].ASME Paper 93-GT-435, 1993.