CAJ | 학술논문

为获得多射流的流体动力学特性和了解多射流降噪优势，采用总压测量、流动显示、声学测量等手段，通过对多射流进行了不同压比下、沿射流中心线不同位置处的总压测量研究，指出多射流相对单射流而言具有降噪的优势，其原因是多射流的汇聚耦合消弱了与激波结构相关的宽频噪声，平缓了湍流的混合噪声，多射流的内环低压区的形成可以抑制射流的扩散。
위획득다사류적류체동역학특성화료해다사류강조우세，채용총압측량、류동현시、성학측량등수단，통과대다사류진행료불동압비하、연사류중심선불동위치처적총압측량연구，지출다사류상대단사류이언구유강조적우세，기원인시다사류적회취우합소약료여격파결구상관적관빈조성，평완료단류적혼합조성，다사류적내배저압구적형성가이억제사류적확산。
Very few studies have described the performance of high-speedmultiple jets. This investigation is conducted to understand the characteristics and advantages of noise reduction for multiple jets. Measurements are presented of the total pressure field at various positions along the centerline of the multiple jets. The investigation shows that the main advantages of multiple jets is the noise reduction caused by the interaction of the multiple jets which attenuates the noise associated with the shock. The low total pressure of the inner region is measured which leads to the low jet spread.