分流器对进气粒子分离器性能的影响

为了揭示分流器位置及形状对进气粒子分离器(IPS)性能的影响,采用Realizable k-ε湍流模型对IPS进行了数值模拟,得到了分流器沿轴向移动及径向移动对IPS流场、分离效率、总压损失的影响,在此基础之上,研究了分流器唇口处与内壁面最高点轴向距离及径向距离的比值及分流器形状对IPS的影响,结果表明:比值较大时,随着轴向距离的增加,总压损失呈下降趋势,且下降梯度较大.当比值较小时,总压损失呈先减小后增加的趋势;与未改变分流器形状相比,分流器形状改变后总压损失有所降低,分离效率提高,并且分流器唇口处最高马赫数有所降低.

Effect of splitter on performance of inlet particle separator

In order to investigate how the position and the size of splitter affect the performance of integral particle separator(IPS),a numerical simulation was conducted by using the Realizable k-ε turbulence model.The simulation came out with the effects of splitter movements in axial direction and radial direction on flowfield,separation efficiency and total pressure loss in IPS.On this basis,the ratio of axial distance to radial distance at splitter lip,the highest point of inner wall surface,and the shape of the splitter’s effect on IPS were studied.The results show that:When the ratio is large,with the increase of the axial distance,total pressure loss declines with a large gradient descent.When the ratio is small,total pressure loss tends to decrease at first and then increase;after the shape of the splitter changes,the total pressure loss becomes much lower while the separation efficiency getting much higher,and the highest Mach number at the splitter lip also decreases.