叶栅稠密度及进出口气流角对反推性能的影响

导流叶栅几何及气动参数的选取直接关系到叶栅式反推力装置的性能,本文选取冲击式对称叶栅进行数值模拟,采用混合网格生成技术,研究叶栅稠密度、叶片进口气流角和出口气流角对轴向反推力系数和流量系数的影响。计算结果表明,叶栅稠密度在一定范围内变大时,流量系数减小,轴向反推力系数增加;在反推气流不被进气道吸入的情况下,当气流角增大,流量系数变大,轴向反推力系数降低。双曲非等厚叶片的气动性能要好于单曲等厚叶片。

The Influence of Cascade Solidity and Flow Angle of Inlet and Outlet on Aerodynamic Performance of Cascade Thrust Reverser

The aerodynamic performance of a cascade thrust reverser is affected by configuration and parameter of cascade,so this paper used symmetrically shaped cascade blades,with the technology of hybrid grid system,and studied the influence of solidity and flow angle of inlet and outlet on the axial reverser thrust coefficient and mass flow coefficient.The final computation results show：the axial reverser thrust coefficient increases as solidity increases in a certain extent,but the mass flow coefficient decreases;when reingestion don＇ t occur,the mass flow coefficient increases as flow angle increases,but the axial reverser thrust coefficient decreases.The double-curvature blades are better than the single-curvature blades in aerodynamic performance.