收敛-扩散喷管几何参数对内特性的影响
EFFECT OF GEOMETRIC PARAMETERS ON INTERNAL PERFORMANCE OF CONVERGENT-DIVERGENT NOZZLE
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摘要: 航空发动机广泛采用机械可调式收敛-扩散喷管,正确地选择几何参数是喷管设计的主要任务之一。本文通过模型试验研究具有不同几何参数的收敛-扩散喷管在不同工况下的推力特性和壁面压力分布。试验设备及测量系统见文献。模型喷管有轴对称收敛-扩散型和两侧壁为有机玻璃的二元收敛-扩散型两种,其几何参数为:面积比CA为1.0~2.4扩张半角α为0~24°,收敛半角β为8~24°,喉部圆角半径R0与喉道半径R1之比为0.31~2.0。Abstract: The efect of geometric parameters on internal performance of convergent-divergent nozzle has been investigated experimentally. The relationships of thrust coefficient and wall static pressure distribution to area ratio, divergent angle, convergent angle and throat radius of curvature are presented in this paper.
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