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为了能够通过叶栅试验研究总压畸变对压气机静叶流场结构的影响,本文在已有研究成果的基础上,提出通过改变局部进口导叶安装角来实现静叶进口不均匀流场的试验方法,并采用数值模拟研究了不同条件下静叶流场变化情况。研究表明,采用可调导叶实现静叶前气流角周向不均匀的流场是可行的。随着4号导叶安装角的减小,静叶进口气流角、密流等参数趋于周向不均匀,但各参数不均匀的形式略有不同;流动损失主要由导叶尾迹和泄漏流引起,4号导叶安装角的减小使损失增大,从而加重了下游6号和7号静叶吸力面的分离,恶化了下游流场。
In order to be able to study the effect of total pressure distortion on the flow field of compressor vane through the cascade test, based on the existing research results, the paper proposes to change the flow field of stator vane inlet by changing the installation angle of local inlet vane Test methods, and numerical simulation study of the vortex flow field changes under different conditions. The research shows that it is feasible to adopt the adjustable guide vane to realize the circumferentially non-uniform flow field in front of the stator blades. With the decrease of the installation angle of No. 4 guide vane, the inlet angle and density of static vane tend to unevenly distributed in the circumferential direction, but the shapes of the various parameters are slightly different. The flow loss is mainly caused by the wake of guide vane and leakage flow The decrease of the mounting angle of No.4 guide vane increases the loss, which aggravates the separation of the suction side of No.6 and No.7 static vanes downstream and worsens the downstream flow field.