脉冲吹气控制气动舵面流动分离机理、特性及相似准则研究

项目名称： 脉冲吹气控制气动舵面流动分离机理、特性及相似准则研究

项目编号： No.11272035

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 王延奎

作者单位： 北京航空航天大学

项目金额： 86万元

中文摘要： 针对无尾布局飞机气动舵面流动分离问题，基于本课题组研制的新型小流量、脉冲式吹／吸协同控制技术和实验装置，开展脉冲吹气控制参数影响特性研究，揭示脉冲吹气控制流动机理；分析脉冲吹气频率对控制效果的影响特性，揭示脉冲吹气频率和吹气动量系数影响特性之间的相关关系，探索脉冲吹气流动控制技术的主控相似参数；并将研究成果推广到不同主翼绕流流型影响下的舵面流动分离控制，从而达到控制舵面流动分离，提高舵面气动效率，为改善无尾布局飞机操稳特性提供先进和工程实用的小流量脉冲吹气流动控制方案。 该项目研究工作的开展，无论对于我国的空气动力学基础科学研究，还是未来武器装备发展的军事需求，都具有十分重要的现实意义。

中文关键词： 流动分离；流动控制；脉冲吹气；相似参数；

英文摘要： Because the flight performance of aircraft is so dependent on aerodynamic efficiency of elevator, it is very important to improve the flow separation over the control surfaces at high deflection angle in order to keep the aircraft having good flight capability, especially for the modern aircraft with tailless aerodynamic configuration. The main purpose of this application is to develop a novel control technique to improve separated flow over the control flap of aircraft through pulsed blowing downward firstly. And the effect mechanism of pulsed blowing on separated flow will be investigated based on the study to the effect of parameters on the improving efficiency. Thirdly, since the improving efficiency will be affected by the pulse frequency and average blowing momentum of the pulsed blowing simultaneously, the relationship between effect of pulse frequency and that of average blowing momentum will be discovered and the similarity of the micro-pulsed blowing technique will be put forward. Finally, the effect of flow over the main wing, which is located in front of the flap windward, on improving efficiency by pulsed blowing over the flap will be studied under conditions of different attack angle of main wing and free stream speed, etc.

英文关键词： Flow Separation；Flow Control；Pulsed Blowing；Similarity Parameter；