内燃机工程2025，Vol.46Issue(1)：91-99,108,10.DOI:10.13949/j.cnki.nrjgc.2025.01.011
涡轮增压器压气机自循环机匣非定常扩稳机理研究
Research on the Unsteady Mechanisms of Stability Expansion of a Turbocharger Compressor with Self-Recirculating Casing Treatment
摘要
Abstract
To investigate the unsteady mechanisms of flow stability enhancement for self-recirculating casing treatment(SRCT),the three-dimensional full-channel unsteady flow fields of a turbocharger compressor under typical operating conditions were obtained using unsteady numerical simulation methods.By comparing the unsteady characteristics of the compressor with solid casing and SRCT under the design condition and near-stall condition,the reasons for the decrease in flow stability of the solid casing compressor under the near-stall condition were explored,and the unsteady mechanisms of stability enhancement of the SRCT compressor were clarified.The results indicate that the unsteady disturbances in the upstream and downstream of the solid casing compressor are caused by tip leakage vortex of the main and split blades,which interact with each other and have similar frequency distribution with identical dominant frequencies under the same operating condition.The breakdown of tip leakage vortex of the main blade and the formation of channel vortex are the main reasons for the enhancement of unsteady pulsation,the intensification of blockage,and the stability deterioration in compressor upstream.The SRCT,through its suction effect,can effectively maintain the stability of the leakage vortex at the leading edge of the main blade,prevent it from breaking down,and mitigate flow blockage in regions of high blade height.Additionally,it can effectively prevent interference between the upstream and downstream leakage vortices,thereby enhancing the flow stability of the compressor.关键词
离心压气机/全通道数值模拟/自循环机匣处理/非定常流动特性/扩稳机理Key words
centrifugal compressor/full-channel numerical simulation/self-recirculating casing treatment(SRCT)/unsteady flow characteristic/stability enhancement mechanism分类
机械制造引用本文复制引用
田津津,刘玉焱,李孝检,付璐阳,张哲,赵祎佳..涡轮增压器压气机自循环机匣非定常扩稳机理研究[J].内燃机工程,2025,46(1):91-99,108,10.基金项目
天津市教委科研计划项目(2023KJ205) （2023KJ205）
国家自然科学基金项目(12102298)Tianjin Municipal Education Commission Research Project(2023KJ205) （12102298）
National Natural Science Foundation of China(12102298) （12102298）
