叶顶间隙对轴流风机性能影响的大涡模拟研究

Large-Eddy Simulation Study on Effect of Blade Tip Clearance on Performance of the Axial Flow Fan

为了研究分析叶顶间隙对轴流式通风机性能的影响,分别对1mm、2mm和4mm的三种叶顶间隙建立了三维全流道作为计算域,采用大涡模拟方法对其三维全流场进行数值模拟,得到了轴流式通风机的效率和压升随流量的变化曲线,对比分析了不同的叶顶间隙对风机性能的影响,另外,得到了叶顶泄漏涡的强度和影响区域随着叶顶间隙的增大而增大。

For analyzing the influence of tip clearance on the performance of axial flow fan,it is as the computational domain that three kinds of tip clearance physical model including 1mm,2mm,4mm are set up respectively and numerically simulated by large eddy simulation method.The research result show that the pressure and efficiency performance curve of axial fan are obtained.The influence of different tip clearance on fan performance were compared and analyzed.In addition,the intensity and influence area of tip leakage vortex increase with the tip leakage clearance increasing.