气冷径向稳定器张角对混合扩压器性能影响

针对一种混合扩压器和气冷径向稳定器一体化新型结构,基于N-S方程建立了流场三维数值计算模型,研究了气冷径向稳定器张角变化对混合扩压器流场、流阻特性和混合特性的影响规律.结果表明:随着气冷径向稳定器张角的增大,混合扩压器的静压恢复系数逐渐减小,混合扩压器的流阻系数和压力损失系数均逐渐增大；在混合扩压器出口截面处,随着气冷径向稳定器张角的增大,总压恢复系数逐渐减小,总压恢复系数的最大值与最小值相差0.0032.热混合效率逐渐增大,热混合效率的整体变化范围为0.7268~0.8857. 

Effect of air cooled radial stabilizator opening angle on performance of the mixer and diffuser.

For a new type of mixer and diffuser and air cooled stabilizator integration structure, a three dimensional numerical simulation model based on the N-S equation was created. Through numerical simulation, the flow field, flow resistance characteristics and mixing characteristics of different air cooled radial stabilizator opening angles in the mixer and diffuser were obtained. The results show that, the recovery coefficient declines as the air cooled radial stabilizator opening angle increases; the flow resistance cofficient and pressure loss coefficient of the mixer and diffuser increases with the growing air cooled radial stabilizator opening angle. Around the exit section of the mixer and diffuser, the total pressure recovery coefficient declines as the air cooled radial stabilizator opening angle increases, the difference between the maximum and the minimum values is 0.0032, and the thermal mixing efficiency increases with the whole range of 0.7268~0.8857.