自耦合射流对平行主射流的矢量偏转PIV实验

• 作 者: 李念 张堃元 徐惊雷 沙江
• 机 构: 南京航空航天大学能源与动力学院,南京航空航天大学能源与动力学院,南京航空航天大学能源与动力学院,南京航空航天大学能源与动力学院 江苏南京210016,江苏南京210016,江苏南京210016,江苏南
• 出 处: 航空动力学报
• 发表日期: 2006年04期
• 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

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 study the effect of self-coupling jet under different excitation signals on the vectorial deflection of the main jet, a parallel arrangement is adopted to take advantage of the entrainment effect of the low pressure zone formed on both sides of the exit of the piezoelectric single slit actuator to make the main jet flow occur Obviously vector deflection. The PIV experiment shows that when the excitation signal f = 400 Hz, the momentum flux of the self-coupled jet reaches the maximum, the entrainment capacity of the main jet on the ambient air is the strongest, and the boundary reaches the maximum. When the excitation signal f = At 500 Hz, the striker at the exit of the exciter showed the strongest entrainment effect, and the main jet with a velocity of 2.6 m / s was deflected by a maximum of 48 °.