低雷诺数下高负荷轴流压气机表面粗糙度流动调控机制

程泓智; 王名扬; 周创鑫; 赵胜丰; 卢新根; 朱俊强

doi:10.13224/j.cnki.jasp.20210134

低雷诺数下高负荷轴流压气机表面粗糙度流动调控机制

doi: 10.13224/j.cnki.jasp.20210134

程泓智^1,2,3,
王名扬^1,2,3,
周创鑫^1,2,3,
赵胜丰^1,2,3,
卢新根^1,2,3,
朱俊强^1,2,3

1.
中国科学院工程热物理研究所轻型动力重点实验室，北京 100190
2.
中国科学院大学工程科学学院，北京 100049
3.
中国科学院轻型动力创新研究院，北京 100190

基金项目: 国家自然科学基金（51836008）；航空发动机及燃气轮机重大专项基础研究（2017-Ⅱ-0010-0024）

详细信息

作者简介:
程泓智（1996-），男，硕士生，主要研究领域为叶轮机械气动热力学。

中图分类号: V231.1
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出版历程
- 收稿日期: 2021-04-02
- 刊出日期: 2022-02-28

Surface roughness flow control mechanism of highly-loaded axial compressor under low Reynolds number conditions

CHENG Hongzhi^1,2,3,
WANG Mingyang^1,2,3,
ZHOU Chuangxin^1,2,3,
ZHAO Shengfeng^1,2,3,
LU Xingen^1,2,3,
ZHU Junqiang^1,2,3

1.
Laboratory of Light-Duty Gas-Turbine，Institute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China
2.
School of Engineering Science，University of Chinese Academy of Sciences，Beijing 100049，China
3.
Innovation Academy for Light-duty Gas Turbine，Chinese Academy of Sciences，Beijing 100190，China

摘要

摘要: 以某1.5级高负荷轴流压气机为研究对象，采用经过校核的数值模拟手段详细探究了低雷诺数下表面粗糙度对其气动性能及内部流场的影响。结果表明：相比于光滑叶片，表面粗糙度为137.8时压气机性能提升最为明显，总压比、堵塞流量以及峰值效率分别提升4.01%、2.24%、5.34%。在整个表面粗糙度大小范围内，表面粗糙度布置在吸力面前缘至50%轴向位置时对分离、转捩的调控效果较好，能够较大限度地提升低雷诺数下压气机的气动性能。表面粗糙度通过促进转捩、抑制层流分离以及改变速度和静压分布来改善压气机流场和气动特性，同时一定程度上恶化了后面级的级间匹配关系，造成静子叶根处分离提前，角区分离加剧，限制了压气机整体气动性能的进一步提高。
- 叶片表面粗糙度 /
- 低雷诺数 /
- 高负荷轴流压气机 /
- 峰值效率 /
- 气动性能
Abstract: Numerical investigations were conducted to investigate the effects of the surface roughness on the aerodynamic performance of a 1.5-stage highly-loaded axial compressor under low Reynolds number conditions.Results showed that the highest aerodynamic performance improvement was achieved at surface roughness 137.8.The maximum increase in total pressure ratio，blocking flow，and peak efficiency was 4.01%，2.24%，and 5.34%，respectively.Detailed analysis showed that，within the entire region of surface roughness magnitudes，the surface roughness covering from leading edge to the 50% axial chord length on the suction surface had a relatively evident advantage to control the separation and transition，and the aerodynamic performance of compressor at low Reynolds number conditions was improved more distinctly.In general，at low Reynolds number，surface roughness can promote the transition，suppress the laminar flow separation，and change the overall magnitudes and distributions of the velocity and the static pressure，which improved the flow field and performance.However，it also deteriorated the incoordination between the subsequent stages，which induced a stronger corner separation in the aft stator，and limited the further improvement of the overall aerodynamic performance of the compressor.
- surface roughness of blade /
- low Reynolds number /
- highly-loaded axial compressor /
- peak efficiency /
- aerodynamic performance

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