两种轴对称边界层方程的新解法

本文给出了与Mangler变换相类似的变换,它们将两种过流通道中进口段轴对称层流边界层流动转换成平面层流边界层流动,使问题得到简化.简化后的方程可以用已有的平面层流边界层理论加以解决,从而为人们开辟一条解决轴对称通道进口段流动问题的新途径.     

THE NEW SOLUTIONS FOR TWO KINDS OF AXIALLY SYMMETRICAL LAMINAR BOUNDABY LAYER EQUATIONS

The transformations, which are similar to Mangler's transformation, are given in this paper, and make the two kinds of entrance region flow of axially symmetrical laminar boundary layer in internal way into the flow of two-dimensional boundary layer, and simplify the proboems. The simplified equations can be solved by the 2-D boundary layer theory. Therefore, a new way is opened up to solve the axially symmetrical flow in the entrance region of internal way.     

The new solutions for two kinds of axially symmetrical laminar boundary layer equations

The transformations, which are similar to Mangier's transformation, are given in this paper, and make the two kinds of entrance region flow of axially symmetrical laminar boundary layer in internal way into the flow of two-dimensional boundary layer, and simplify the proboems. The simplified equations can be solved by the 2-D boundary layer theory. Therefore, a new way is opened up to solve the axially symmetrical flow in the entrance region of internal way.Project Supported by the Scientific Fund of Chinese Academy of Science.     

有周向倾斜叶片的压气机叶栅的实验研究

本文对具有常规直叶片和周向倾斜25°叶片的压气机平面叶栅进行了吹风实验,叶片叶型是NACA 65系列的大转角叶型。还应用墨迹法进行流场显示,从出口测量结果和流场显示照片可见:叶片正倾斜可以消除压气机叶栅的壁角失速,叶片负倾斜却使壁角失速加大。同时本文还从涡动力学角度分析了消除壁角失速及减少损失的机理。