接受孔元件的周向速度系数模型与验证

Modeling and Validation on Circumferential Velocity Ratio of Receiver Hole

分析简化预旋系统的流路和典型工况下接受孔附近流场,建立预测接受孔周向速度系数的数学模型,在一系列工况下对盖板预旋系统进行了CFD分析,并将计算结果和模型预测结果进行对比,证明采用该模型预测周向速度系数的有效性。研究结果表明:接受孔内流动按流动形态可以分为3个区域,影响因素主要有旋流比、长细比和进气攻角,结合几何关系建立了数学模型,在预测周向速度系数时可达到一定精度;与原始模型相比,利用周向速度系数模型修正接受孔元件后,一维流路的预测结果和CFD计算结果吻合较好。

Simplified pre-swirl system and flow field nearby receiver hole under typical conditions were analyzed.Based on the consequences,circumferential velocity ratio model of receiver hole was constructed.CFD analysis was carried out through a series of typical conditions.Result of comparing to CFD data demonstrates the model prediction is effective.Current study results show that：based on flow pattern inside receiver hole,this area was divided into 3 regions,influencing factors including swirl ratio,length-radius ratio and attack angle,the model to predict circumferential velocity ratio was proved to be enough accuracy.In contrast to the original receiver hole component model,that modi-fied by circumferential velocity ratio makes better coincide with CFD data.