畸变来流下双级对转升力风扇气动性能和流场数值模拟研究  

Numerical Simulation of Aerodynamic Performance and Flow Field of Dual-stage Contra-rotating Lift Fan under Distorted Flow

作　　者：郭伟 孙艺宁 Wei Guo;Yi-ning Sun(School of Power and Energy,Northwestern Polytechnical University)

机构地区：[1]西北工业大学动力与能源学院

出　　处：《风机技术》2021年第S01期1-8,共8页Chinese Journal of Turbomachinery

摘　　要：近年来,升力风扇技术在军民等各个领域展现出惊人的潜力和实用价值。以某双级对转升力风扇作为研究对象,采用NUMECA数值模拟软件对其在畸变来流条件下,不同流量系数工况下的气动性能及内部流场结构进行研究。结果表明:设计转速比下,双级对转升力风扇径向畸变条件下气流角与均匀来流条件下分布基本相同;畸变来流条件下,近失速工况流动情况明显恶化,静子处的流动分离与转子处的叶尖泄漏现象加剧;混合畸变条件下,出口处全通道总压分布不均匀。In recent years,lift fan technology has shown amazing potential and practical value in various fields such as military and civilian.The numerical simulation software NUMECA was used to study the aerodynamic performance and internal flow field structure of a two-stage counter-rotating lift fan under different flow coefficients under the condition of distorted inflow.The results showed that:under the design speed ratio,the distribution of airflow angle under the condition of radial distortion of two-stage counter-rotating lift fan is basically same as that under the condition of uniform inlet flow.Under the condition of distorted inflow,the flow condition in the near stall condition is obviously deteriorated,and the flow separation at the stator and tip leakage at the rotor are aggravated.Under the condition of mixed distortion,the total pressure distribution of the whole channel at the outlet is not uniform.

关 键 词：升力风扇 畸变来流 数值模拟 对转 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]