), 欧阳华a,b a.机械与动力工程学院, 上海交通大学, 上海 200240
b.燃气轮机与民用航空发动机教育部工程研究中心, 上海交通大学, 上海 200240
收稿日期:2020-08-14出版日期:2021-11-28发布日期:2021-12-03通讯作者:吴亚东E-mail:yadongwu@sjtu.edu.cn作者简介:高 原(1996-),男,湖北省荆州市人,硕士生,从事压气机失速工况相关研究.基金资助:上海市自然科学基金资助项目(18ZR1418600)Numerical Simulation of Compressor Stall Recovery Control
GAO Yuana, WU Yadonga,b(), OUYANG Huaa,b a. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
b. Engineering Research Center of Gas Turbine and Civil Aero Engine of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
Received:2020-08-14Online:2021-11-28Published:2021-12-03Contact:WU Yadong E-mail:yadongwu@sjtu.edu.cn摘要/Abstract
摘要： 为了探究退喘阀快速开启时退失速有效性和稳定性的影响因素及其流场机理,对退失速的动态过程进行了数值仿真,并比较了不同放气速度的退失速过程.使用了两种数值模拟方法:分布式变转速MG(Moore & Greitzer)模型和RANS(雷诺平均Navier-Stokes)方程.两者对性能曲线的预测在趋势上吻合较好.RANS结果显示,以不同速度开阀,退失速过程流场变化本质上相同,扰动受由入口产生的高速气流影响向下游迁移,并最终位于转子前缘平面,其尺度会随着轴向高速气流的冲击进一步减小直到完全消散.对比不同开阀速度可知,开阀越快,入口产生的高速气流越强,使得退失速时间越短;扰动削弱程度越大,扰动的周向传播速度越快,越接近转子转速.开阀过程中,气流波动会更剧烈,能量损失更多.
关键词: 失速, 退喘阀门控制, 分布式变转速MG模型, 数值模拟, 流场机理分析
Abstract: In order to explore the influencing factors of the effectiveness and stability for stall recovery and its flow mechanism when the antisurge valve is opened quickly, the dynamic stall recovery processes are simulated and the recovery processes at different discharging speeds are emphatically compared. Two numerical simulation methods, i.e., the distributed speed-changeable MG (Moore-Greitzer) model and the RANS (Reynolds Averaged Navier-Stokes) equation are used. The performance curves predicated by the two models agree well. The results of RANS show that the flow field changes are essentially the same when the valve is opened at different speeds. The disturbance, affected by the high-speed air flow generated at the inlet, moves downstream and finally reaches the leading edge of the rotor, whose scale will be further reduced with the impact of axial high-speed flow until completely dissipated. A comparison of different valve opening speeds indicates that the faster the valve is opened, the stronger the high-speed air flow generated at the inlet, shortening the stall recovery time. The greater the disturbance weakening degree, the faster the circumferential propagation speed of the disturbance, and the closer to the rotor speed. In the process of valve opening, the air flow fluctuation is more intense, and more energy is lost.
Key words: stall, antisurge valve control, distributed speed-changeable Moore-Greitzer model, numerical simulation, flow mechanism analysis
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