基于螺旋襟翼的喷流偏转实验研究

基于阿基米德螺旋线理论，通过逐渐增大曲率半径的方法，设计了一种新型的流动控制襟翼——螺旋襟翼。研究了螺旋襟翼的起始半径、对齐半径等关键控制参数对上表面喷流偏转的影响规律，并与传统基本襟翼的控制效果进行了对比，对二者的控制机理进行了分析。结果表明:所设计的螺旋襟翼最大平均推力偏转角约为19.6°；与基本襟翼相比，螺旋襟翼在大落压比下的平均推力偏转角更大，推力效率更高，这说明改变曲率型面可以促进喷流的流动附着，提高上表面吹气系统性能。

Experimental study on jet turning based on spiral flap

A new flow control flap, spiral flap, was designed by gradually increasing the curvature radius based on Archimedes helix theory. The influence of the key control parameters such as the initial radius and alignment radius of the spiral flap on the upper surface jet deflection is studied. The control effect of the spiral flap is compared with that of the traditional basic flap, and the control mechanism of the two is analyzed. The results show that the maximum average thrust deflection angle of the spiral flap is about 20°. Compared with the basic flap, the spiral flap has larger average thrust deflection angle and higher thrust efficiency at large drop pressure ratio, which indicates that changing the curvature profile can promote the flow adhesion of the jet and improve the performance of the upper surface blowing system.