摘要
悬臂静子在小型涡轮喷气和涡轴发动机的轴流压气机上广泛应用,为了探讨不同条件下悬臂静子间隙的影响,在特定的环境下,分别针对常规负荷和高负荷、小轮毂比和中等轮毂比,组合成几种不同方案,计算分析了静子根部径向间隙分别为弦长的0%、0.25%、0.5%、1%、1.5%和2%情况。计算结果表明:与叶栅中情况类似,在压气机中,悬臂静子同样存在一个特性上表现最优的最佳间隙;在根部未发生角区失速的大流量状态和设计状态,间隙的引入会使得特性恶化,在根部发生角区失速后的小流量状态,间隙的引入则能使得特性变优;间隙形成的泄漏流对角区分离的影响与间隙大小和角区分离程度相关;压气机设计状态负荷水平减小后,间隙的影响规律基本不变;轮毂比增大后,最佳间隙值有减小的趋势。
Cantilevered stator is widely used in axial flow compressor of small turbojet and axial flow engines, in order to study the effect of cantilevered stator’s gap under different conditions, several different cases including normal and high load, small and medium wheel hub ratio, under certain circumstance are simulated. The results show that similar to cascade, cantilevered stator in compressor has a specific gap which has the best characteristic performance, the existence of gap will deteriorate characteristic performance when there is no root corner stall under high flow condition and design condition, the existence of gap will improve characteristic performance when there is a root corner stall under small flow condition. The leakage flow’s effect on root corner separation brought by the gap is related to the gap’s size and root corner separation’s degree. The gap’s effect trend is unchanged when the compressor’s load is reduced. The best gap’s size seems to be reduced when the wheel hub ratio increases.
作者
张明华
ZHANG Minghua(Commercial Aircraft Corporation of China Ltd,Shanghai 200126,China)
出处
《民用飞机设计与研究》
2019年第3期47-54,共8页
Civil Aircraft Design & Research
关键词
轴流压气机
悬臂静子
泄漏流
角区分离
axial flow engines
cantilevered stator
leakage flow
corner separation
