The Influence of Installation Angle of Different Reaction Supersonic Turbine Guide Vane on Turbine Performance

Based on a axial flow single-stage high reaction supersonic high-pressure turbine (HPT), HPT designs with different reaction levels were constructed, and research was conducted on installation angle caused by turbine guide groups in aviation engine engineering applications. The numerical simulation method was mainly used to analyze influence of installation angle of supersonic HPT guide vanes with different reaction on performance parameters such as throat area, reaction, Mach number, and efficiency. The results indicate that if a large group design is selected for guide vane, that is, when flow capacity of HPT increases by 6%, the installation angle of guide vane required for high reaction supersonic turbine changes relatively large, and the variation pattern of guide vane throat area is consistent with the variation relationship of installation angle. As the installation angle increases, turbine reaction gradually increases, and the change of reaction is approximately linear with installation angle. However, the shock wave enhancement in the channel of supersonic turbine blade with high reaction is particularly significant, leading to reduce turbine efficiency, and efficiency of supersonic turbine with low reaction gradually improves with increasing of installation angle.