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为了指导导叶-静叶结构的扇形叶栅试验,设计周期性好的叶栅试验件,本研究采用数值模拟的方法,研究试验件两侧导流挡板结构尺寸对扇形叶栅周期性的影响。通过对比改型试验件模型与原始试验件模型中径处导叶/静叶出口气流角、马赫数的周向分布规律和S1流面流场结构,分析两侧导流挡板结构对试验件周期性的影响,初步确定改型模型3为试验件模型。在此基础上详细分析了模型3的导叶/静叶流场结构。研究结果表明:本研究提出的挡板截断模型能够较好的改善扇形叶栅试验件的周期性,其中模型3将可测流道从4个增加到7个,可满足扇形叶栅风洞试验对试验件周期性的要求。
In order to guide the fan-shaped cascade test of guide vane-stator blade structure and design a good periodic cascade test piece, the numerical simulation method was used in this study to study the influence of the size of the deflector structure on the fan cascade influences. By comparing the air flow angle, the Mach number distribution and the flow field structure of S1 flow at the outlet of guide vane / vane at the diameter of the original test piece model and the model of the original test piece, Periodic impact, initially identified modified model 3 as the experimental model. On this basis, the flow field structure of guide vane / stator blade of model 3 is analyzed in detail. The results show that the baffle truncation model proposed in this study can improve the periodicity of fan cascades better. In model 3, the number of measurable flow paths increases from 4 to 7, which can meet the fan-shaped cascade wind tunnel test Periodic requirements for test pieces.