基于高频响Stereo-PIV和快响应压敏漆PSP的翼型振荡射流环量控制实验研究

环量控制翼型无需机械舵面，具有控制简单和重量轻等特点，但也面临气量消耗大等难题。针对该问题，本项目拟研究一种基于振荡射流的新型环量控制技术，提高控制效率，降低气量消耗。振荡射流无需运动部件，通过振荡器内部流动特性，可以产生脉冲式和扫掠式两种非定常射流，具有效率高和工作稳定等优势。申请人在振荡射流工作机理等方面已经开展了一些基础性研究。基于此，本项目将针对振荡射流环量控制方法，开展系统的实验研究。通过集成高频响Stereo-PIV和快响应压敏漆PSP等技术，克服传统测量方法时空分辨率不足的问题。首先，针对振荡射流参数控制难题，改进振荡器结构，得到射流参数对翼型气动力影响规律；其次，揭示振荡射流在分离控制阶段的控制机理；最后，揭示在超环量控制阶段的挟带和失速特性。通过综合对比振荡射流脉冲和扫掠两种方式的控制特性，制定优化方案，提升控制效率。

Circulation control wing (CCW) can control the aerodynamically behaviors of an airplane without using mechanical control surface but using jet flow at the rear of the wing. However, CCW requires a relatively large amount of airflow from the engine, which is the bottleneck of the CCW in application. In regard of this critical problem, current project will use a new unsteady flow control method, named fluidic oscillator or sweeping jet, in CCW. This new technology can decrease the required airflow, with stable working ability and high control authority. This project will use TR-PIV and fast PSP to conduct experiment, and develop advanced data processing method. First,the internal design of the sweeping jet oscillator will be improved to control the jet parameters. The relationship between the jet parameters and aerodynamical force will be studied. Second, the control mechanics in the flow separation control and super circulation control will be revealed. Last, the different control characteriscs of the two sweeping jet control methods will be compared. Based on sweeping jets, a new circulation control method will be developed to improve the control efficience.