An anti-distortion stator design method suitable for counter-rotating lift propulsion devices

Abstract

The invention discloses an anti-distortion stator design method suitable for a counter-rotating lift propulsion device, which is mainly aimed at the blade shape in the area above 55% of the blade height in the original stator design. Coupling analysis and reconstruction of multiple structural parameter distributions such as local stator leading / trailing edge radius distribution, installation angle distribution, chord length axial projection distribution, mid-arc length distribution, and maximum thickness distribution, and reasonable layout of anti-corrosion airfoils according to the distortion range The distortion stator area is used to change the local distortion propagation characteristics of the stator. The invention has the functions of suppressing the circumferential unevenness of the flow field at the inlet of the second-stage rotor of the lift propulsion device, the unsteady effect of various flow field parameters at the inlet of the second-stage rotor, and the wake effect of the first-stage stator. At the same time, the stator structure is adopted No detrimental effect on the aerodynamic steady performance curve of the lift fan. In addition, the present invention has certain simplicity in design and processing, and has the potential of popularization and application in practical engineering.

Description

Technical field[0001]The present invention relates to the field of aerospace vehicle design, and more particularly to an anti-distortion static sub-design method suitable for the transfer force propulsion, which is suitable for the shutter shielding or flight of the hybrid aircraft lift propulsion device.Background technique[0002]The important power unit of the transfer fan as a futuristic mixed aircraft, and its stability directly determines the aircraft motor performance and the safety of the landing process. Since most of the mixed aircraft is used in a place where the weighing mountains, marine island reef and the aircraft carriers are more disordered, their lift fan stability is often threatened. In addition, in the startup of the lift fan, its masking cover opens the local distortion flow field exacerbated this threat. Therefore, how to ensure a variety of environmental distortion effects to a key technique for ensuring the stability of the lift fan in a variety of environment...

AI Technical Summary

Problems solved by technology

[0005] However, most of the above studies are based on single-stage turbomachinery. Since there is a significant reaction of the second stage to the first stage in more stage turbomachinery (especially for counter-rotating lift fans with reversed rotors in the second stage), it is aimed at the single-stage turbomachinery. The results of the study may be at risk of invalidation

In addition, most of the corresponding asymmetric layouts in the above studies only start from the basic parameters such as the number of local blades and the installation angle of local blades, and rarely couple multiple geometric parameters to redesign the blade configuration.

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