脉冲进气条件下可调向心涡轮内部流场数值研究

推进技术 ›› 2015, Vol. 36 ›› Issue (7): 1013-1019.

脉冲进气条件下可调向心涡轮内部流场数值研究

刘尹红,杨　策,刘贻雄,刘　恒

北京理工大学机械与车辆学院，北京 100081,北京理工大学机械与车辆学院，北京 100081,北京理工大学机械与车辆学院，北京 100081,北京理工大学机械与车辆学院，北京 100081

发布日期:2021-08-15
作者简介:刘尹红(1983—)，女，博士生，研究领域为叶轮机械气动热力学。
基金资助:
2011博士点专项基金(20111101130002)；国家自然科学基金(51276017)。

Numerical Investigation on Pulsating Flow Field

School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China,School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China,School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China and School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China

Published:2021-08-15

摘要/Abstract

摘要： 为评估可调向心涡轮在脉冲进气条件下的性能，通过对脉冲进气条件下的涡轮内部流场进行数值模拟分析，得到了脉冲进口压力对导流叶片段泄漏流量和总压损失、导流叶片尾缘激波强度及转子叶片前缘载荷的影响规律。导流叶片段泄漏流量和总压损失及激波随脉冲进口压力提高而线性增大，进口压力每提高10kPa，泄漏流量增加约2.9%，导流叶片段的总压损失增加约2.7%，激波增强约14%；转子叶片前缘载荷也随脉冲进口压力增加而线性上升，当脉冲进口压力提高50kPa时，转子叶片叶根前缘的载荷峰值增加约12.7%，中间叶高前缘位置的载荷峰值增加约24.9%。

关键词: 涡轮；脉冲进气；激波；载荷

Abstract: To evaluate the aerodynamic performance of the variable nozzle turbine(VNT)radial turbine in pulsating inlet condition，the effects of pulsation pressure on the leakage flow and total pressure loss of the nozzle，the shock strength of nozzle trailing edge，the blade loading of the leading edge of the rotor blade are obtained by numerical method. The results show that the leakage flow of nozzle，total pressure loss and the shock strength increase linearly with the increase of turbine inlet pressure. The inlet pressure increases for each 10kPa，the leakage flow rate increases by about 2.9%，the total pressure loss of the nozzle increases about 2.7%，and the shock enhances about 14%. Meanwhile，the blade loading of the leading edge of the rotor blade also increases linearly with the increase of pulsation inlet pressure，when the pulsation pressure increases 50kPa，the blade loading peak of leading edge at the root of rotor blade increases by about 12.7%，and the value at the middle span of the blade increases about 24.9%.

Key words: Turbine；Pulsation flow；Shock；Loading

刘尹红,杨　策,刘贻雄,刘　恒. 脉冲进气条件下可调向心涡轮内部流场数值研究[J]. 推进技术, 2015, 36(7): 1013-1019.

LIU Yin-hong,YANG Ce,LIU YI-xiong,LIU Heng. Numerical Investigation on Pulsating Flow Field[J]. Journal of Propulsion Technology, 2015, 36(7): 1013-1019.

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