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以高亚声速叶栅风洞为实验平台,建立了附面层抽吸系统,针对吸力面开槽的吸附式叶栅进行了系统的平面叶栅吹风试验。定量地分析了附面层抽吸对于叶栅气动特性的影响。试验结果表明,抽吸槽的存在恶化了叶型攻角特性,总压损失系数平均升高了70%。通过附面层抽吸可以明显地减小栅后气流尾迹,改善叶型攻角特性。与原始叶型相比,当各工况抽吸流量处于实验最佳值时,吸附式叶型总压损失系数平均降低了20.5%,叶型扩散因子在来流为设计进口马赫数0.6时平均提高了70.7%。
A high-subsonic cascade wind tunnel was used as the experimental platform to build an interface layer suction system, and a systematic flat-blade cascade air blowing test was carried out for the suction cascade slotted with suction surface. The influence of the suction on the aerodynamic characteristics of the cascade is quantitatively analyzed. The experimental results show that the existence of suction sump deteriorates the attack angle characteristics of the blade, and the total pressure loss coefficient increases by 70% on average. Through the suction layer can significantly reduce the flow after the grid after the wake, to improve the leaf angle of attack characteristics. Compared with the original leaf type, the total pressure loss coefficient of the adsorbed leaf type decreased by 20.5% on average while the suction flow rate of each condition was at the optimum value. The average of the leaf type diffusion factor was 0.5 when the incoming flow was the designed import Mach 0.6 Increased by 70.7%.