一种新型颤振激励系统的数值计算研究  

Numerical Investigation of a New Kind of Flutter Exciting System

作　　者：许和勇[1] 叶正寅[1] 孙勇军[2] 

机构地区：[1]西北工业大学翼型叶栅空气动力学国防科技重点实验室,陕西西安710072 [2]中国飞行试验研究院飞机所,陕西西安710089

出　　处：《飞行力学》2006年第2期93-96,共4页Flight Dynamics

基　　金：航空基础科学基金资助项目(04A53006)

摘　　要：针对一种新型颤振激励系统的特点,采用非结构旋转运动网格技术,通过数值求解非定常欧拉方程,计算了该激励系统工作时的非定常气动力特性,并与准定常计算结果进行了比较。研究结果表明:采用非定常方法所得结果与准定常计算结果有明显的差别;气动力的变化与激励系统中圆柱的旋转方向有关,旋转角速度越大,气动力变化的幅值越小;气动力的幅值与圆柱缝道宽度也有一定关系。The unsteady aerodynamic characteristic of a new kind of flutter exciting system is investigated with the numerical simulation. An effective unstructured rotational dynamic grid was adopted to solve the unsteady two-dimensional Euler equations. The results of the unsteady method were compared with the quasi-steady results. It is shown that the results obtained by the present unsteady method are very different from the quasi-steady results. The aerodynamic lift variation was relevant to the rotational direction of the cylinder. The faster the rotational speed is, the smaller the unsteady lift amplitude will be. The opening width of the cylinder also affects the unsteady lift effectively.

关 键 词：颤振激励系统 非结构旋转运动网格 非定常欧拉方程 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]