微型轴流风扇叶尖非定常流动控制的参数研究  

Parametric Investigations on Unsteady Flow Control of Micro Axial Fan Blade Tip

作　　者：黄嘉鑫 黄国平[1] 张呈 HUANG Jiaxin;HUANG Guoping;ZHANG Cheng(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2024年第6期196-200,共5页Machine Building & Automation

基　　金：基础加强计划项目(2022-JCJQ-ZD-193-12)。

摘　　要：在微型涡扇发动机中,由于发动机尺寸的减小,风扇中以叶尖泄漏涡系为主的流动损失问题较为突出,影响了风扇的稳定工作范围。采用一种被动式非定常流动控制方式,即机匣开孔并通过自循环引气方式实现非定常激励来改善风扇叶尖流场;通过CFD数值模拟的方法研究激励频率与激励强度等主要激励参数对控制效果的影响规律。研究结果表明:当激励频率为泄漏涡主频时能得到最佳的扩稳效果;在有效的控制方案下,激励流量仅为主流的0.06%时,可使压气机综合稳定裕度提升31%,同时峰值效率只损失0.37个百分点,为高性能微型涡扇发动机的发展探索了道路。Due to the reduction of micro turbofan engine size,the flow loss mainly caused by tip leakage vortex in the fan is quite serious,which affects the stable working range of the fan.A passive unsteady flow control method is adopted,namely,unsteady excitation is realized through casing opening and self-circulation air entraining to improve the fan tip flow field.The influence law of major excitation parameters such as excitation frequency and intensity on the control effect is studied by CFD numerical simulation.The results show that the optimal stability expansion effect can be obtained when the excitation frequency is the main frequency of the leakage vortex.With the effective control scheme,when the excitation flow rate is only 0.06%of the main flow rate,the compressor's comprehensive stability margin can be increased by 31%,and the peak efficiency can only lose 0.37 percent point,which explores the way for the development of high performance micro turbofan engine.

关 键 词：自循环机匣处理 非定常流动控制 激励参数 微型轴流风扇 微型涡扇发动机 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]