基于嵌套网格的颤振激励系统数值计算研究  

Numerical investigation of a flutter exciting system based on overset grids

作　　者：许和勇[1] 叶正寅[1] 霍幸莉[2] 

机构地区：[1]西北工业大学翼型叶栅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：《空气动力学学报》2010年第5期536-539,546,共5页Acta Aerodynamica Sinica

摘　　要：基于非结构动态嵌套网格方法,通过求解可压缩非定常Navier-Stokes方程,对一种新型颤振激励系统的工作特性进行了数值计算研究。旋转圆筒的开缝圆心角过大或过小、位置距离小翼后缘过远或过近都会使得激励效果下降,而适当增大旋转圆筒直径可以增加激励的效果,另外,开缝装置的截面形状也会对激振力大小产生一定的影响,在本文的计算状态下,采用月牙形截面时激励效果会较好一些。当开缝50%时,选择靠近翼根处的激励效果会较好一些。Numerical simulation of compressible unsteady Navier-Stokes equations has been used to investigate the working property of a new kind of flutter exciting system based on the method of unstructured dynamic overset grids.The exciting performance of the system will get worse if that the slotted central angle of rotating cylinder is too large or too small,or that the distance from the rear edge of the wing is too near or too far.But increasing the diameter of rotating cylinder can enhance the exciting performance.The shape of the slotted cylinder section also has some influence to the exciting force,and the crescent shape is better than the present shape.When the slotted length is halved,the choice of slotting at the root is better,and it can give a better exciting performance.

关 键 词：非结构网格 嵌套网格 颤振激励系统 开缝圆筒 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]