侧向喷流的一种直接实验模拟

A direct experimental simulation of side-jet steering

研究了侧向喷流的一种直接实验模拟技术,旨在探讨喷流力直接作用在天平上时,侧向喷流对气动载荷的影响及其增益情况。本文的直接模拟是通过一种通气式应变天平实现的。研究中分析了有关模拟原则,妥善处理了诸如高压气体密封、天平变形引发的漂移、干扰等相关技术问题,并在一尖拱柱构型上实现了多种条件下的直接模拟,给出了来流条件和喷口参数条件对法向力、俯仰力矩增益因子的影响。最后,就实验结果进行了适当讨论和评述。

A direct experimental simulation of sidejet steering is studied in this paper, aimed at exploring sidejet steering effects on gasdynamic loads and relevant gasdynamic gains of the jets under the situation that the jet thrust directly acts on the gainbalance. The present direct simulation is realized using a piping gainbalance. The simulation principles are analyzed, and certain technical issues such as sealing of highpressure jetting gas, property drifts of the balance due to the highpressureinduced deformation, and other interferences. Based on this, a number of direct simulations over an ogivecylinder configuration at various conditions are conducted, and effects of incoming and jetting conditions on gasdynamic gains for normalforce and pitchingmoment are presented. Finally, certain discussions and comments are made on the results.