低雷诺数涡轮性能计算研究

以某单级涡轮和某两级涡轮为研究对象,基于发展的子午面流线曲率法计算程序,采用四种含雷诺数效应的损失模型,对涡轮气动热力性能进行了数值模拟计算分析,对比分析了各种损失模型在基本假设、损失机理、损失预测、涡轮性能计算方面的差异.论文特别针对低雷诺数工作条件下航空燃气涡轮的性能进行了数值计算,分析研究了雷诺数变化情况下,涡轮性能变化的规律,比较了不同涡轮损失模型对低雷诺数涡轮性能计算的结果.分析结果表明,由于在基本原理和基本假设等方面的差异,不同损失模型的适用条件不同,预测结果差异也较大,在涡轮设计中应特别予以注意.

Numerical investigation of the capability for low-reynolds turbine

Take some single-stage turbine and some two levels of turbine nheels as the objects of study basde on development meridian plane streamline curvature law computational procedure.Four different loss models with the low Reynolds number correction were coupled in the calculation and simulation of the turbine aero-thermodynamic performance.The paper compares the differences of these models about assumption,mechanism,prediction,performance calculation and so on.The performance for aero-gas turbine working with low Reynolds number was especially simulated.Meanwhile,the effects of Reynolds number on the turbine performance were analyzed in this paper.The results presented that each loss model is suitable for stated turbine design,and for the same turbine,the prediction results using different loss model are different because of the difference in basic theory and assumption.