喉部曲率半径对最大推力喷管性能的影响

针对不同喉部结构进行了最大推力喷管型面设计计算，分析了不同曲率半径对喷管流量系数、几何效率、推力系数、扩张损失和分离点位置的影响。结果表明：流量系数随上游曲率半径的增大而增大，推力系数和几何效率随下游曲率半径的增大而减小；下游曲率半径的增大导致扩张损失在小范围内不断减小，分离点位置后移。

Influence of throat curvature radius on characteristic of maximum thrust nozzle

The contours of a maximum thrust nozzle are designed and calculated for different throat structures. The influence of throat curvature radius on flow coefficient, geometry efficiency, thrust coefficient, divergence loss and location of flow separation point is analyzed. The results show that the flow coefficient increases with the increase of the upstream curvature radius, the thrust coefficient and geometry efficiency decrease with the increase of the downstream curvature radius, the divergence loss decreases with the increase of downstream curvature radius in a small range, and the location of flow separation point moves backward.