论文部分内容阅读
得到了一组包括S_2流面方程、简化S_1流面方程(用于求解叶栅尾部三角区)、流动损失关系方程及落后角关系方程的联合方程组,此方程组用于计算透平机械的正问题。 考虑了亚临界、临界及超临界流动的本质差别,在阻塞计算中考虑了损失的影响。用一种联合求解的方法来求解此方程组。损失、落后角及其它流动参数是在同一迭代过程中得到的,所以不会发生假堵塞,收敛也快。完成了计算机程序并用于跨音透平非设计性能的计算。 用此程序计算透平级出口性能得到了满意的结果。折合流量、效率及膨胀比与实验结果相当符合,计算结果与实验数据之差在1％之内。
A set of joint equations including S_2 flow surface equation, Simplification S_1 flow surface equation (used to solve the triangular area of the tail of the cascade), flow loss equation and backward angle relationship equation are obtained. The problem. Considering the essential difference between subcritical, critical and supercritical flows, the effect of loss is considered in the calculation of the obstruction. Solve this system of equations in a joint solution. Losses, fall-off angles, and other flow parameters are obtained during the same iteration, so false clogging does not occur and convergence is fast. Completed computer program and used for transonic transonic non-design calculations. Using this program to calculate the turbine outlet performance has been satisfactory results. The equivalent flow rate, efficiency and expansion ratio are in good agreement with the experimental results, and the difference between the calculated and experimental data is within 1%.