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提出了一种计算无叶扩压器两壁面上不可压缩三元紊流附面层的方法。分析中假设径向速度剖面为二阶梯形,且附面层内的速度分布采用能明显表示主流流线偏转角影响的Johns ton的三角形模型。将附面层的动量积分方程与主流的关系式联立起来求解。计算出的无叶扩压器的气动特性与作者的试验结果吻合良好。
A method for calculating the incompressible ternary turbulence on the two walls of a non-leaf diffuser is proposed. It is assumed in the analysis that the radial velocity profile is a two-step trapezoid and that the velocity distribution in the overburden employs a Johnston’s triangular model that clearly shows the influence of the main streamline deflection angle. Solving the momentum integral equation of the overlay and the mainstream relation. The calculated aerodynamic characteristics of the vaneless diffuser agree well with the authors’ experimental results.