铰链式畸变元件总压畸变特性数值仿真及建模OA

In order to obtain the total pressure loss characteristics of the hinge element downstream,which is the basic unit of the adjustable hinge pressure distortion generator,this research adopts numerical simulation to look into the influence of the hinge element opening angle,aspect ratio,opening hole and Mach number on the total pressure loss characteristics of the down-stream measurement section,and establishes the total pressure distribution model of the downstream section of a single hinge element by random forest regression and BP neural network algorithm.The results show that when the opening angle of component is small,the measurement section of the downstream component presents two symmetrical low-pressure regions,and the distance between low pressure regions increases with the increase of aspect ratio.Also,the increase of aspect ratio and opening angle will add to the total pressure loss of the same section.The opening of the element mainly changes the total pressure loss of the measured section,and is related to the opening angle of the element.Finally,the extent of influence of the geometrical characteristics of elements on the total pressure distribution is in the order of opening angle,aspect ratio and opening rate.