自耦合射流对平行主射流的矢量偏转PIV实验  

Experimental investigation of primary flow vectoring using parallel self-coupling jets

作　　者：李念[1] 张堃元[1] 徐惊雷[1] 沙江[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《航空动力学报》2006年第4期675-680,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(10072027)

摘　　要：为研究不同激励信号下自耦合射流对主射流的矢量偏转的影响,采用二者平行布局的方式,利用压电陶瓷单缝激励器出口两侧形成的低压区的卷吸作用,使主射流发生了明显地矢量偏转。PIV实验表明,当激励信号f=400 Hz时,自耦合射流的动量通量达到最大,主射流的对环境气体的卷吸能力最强,其边界也达到了最宽;而当激励信号f=500 Hz时,激励器出口缝处表现出最强的卷吸作用,并使流速2.6 m/s的主射流发生了最大48°的矢量偏转。In order to investigate the influence of self-coupling jet on the vectoring of the primary jet, parallel jets arrangement were adopted. The self-coupling jet exciter is parallel to the primary jet and the formation of a low-pressure region between the jets results in a deflection of the primary jet towards the exciting jet. The PIV experimental study shows that for f=400 Hz, the momentum flux of the self-coupling jet achieves its maximum value, while the boundary of the primary jet reaches its maximum width due to the strongest suction ability to the environmental gas. However, the experiment indicates that for f= 500 Hz, due to the self-coupling jet exciting, the maximum 48° vectoring of the primary jet with a flow speed of 2.6 m/s achieves.

关 键 词：航空 航天推进系统 PIV粒子图像测速仪 自耦合射流 射流矢量偏转 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]