一种适合于旋翼涡流场计算的非结构自适应嵌套网格方法  

An adaptive unstructured embedded mesh methodology suitable for the calculation on the rotor vortex flowfield

作　　者：叶靓[1] 招启军[1] 徐国华[1] 

机构地区：[1]南京航空航天大学直升机旋翼动力学国家级重点实验室,江苏南京210016

出　　处：《空气动力学学报》2010年第3期261-266,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(10602024)

摘　　要：针对旋翼涡流场的特点,提出了一种新的非结构自适应运动嵌套网格方法。在该运动嵌套网格方法中,贴体网格采用非结构网格,背景网格使用可自适应的笛卡尔网格,以便发挥非结构网格的形状描述能力和笛卡尔网格的空间自适应优势,方便网格生成过程并提高计算精度,同时克服在物体表面附近自适应笛卡尔网格生成工作量大和过程烦琐的不足。在此基础上,使用求解N-S主控方程的方法,分别对旋翼的悬停和前飞流场进行了数值模拟,计算结果表明本文的非结构自适应运动嵌套网格方法对提高旋翼涡流场的细节捕捉能力和计算精度是很有效的。Considering the characteristic of the rotor vortex flowfield, a new adaptive unstructured embedded mesh methodology was presented. In this method, the unstructured mesh was used as the bodyfitted thesh and the adaptable Cartesian mesh was adopted as the background mesh for the sake of utilizing the advantages of the unstructured mesh in shaping and the Cartesian mesh in adaptable aspect, simplifying the process of the mesh generation and improving the precision of the calculation, at the same time, reducing the effort of the adaptable Cartesian mesh generation when the region was very close to the surface of the body and simplifying the trivial process. The flowfields of the rotor in hover and forward flight state have been calculated respectively by solving the N S equations and using the present adaptable mesh system, and it was demonstrated that the rotor vortex flowfield and t Key words： unstructure present method was very useful for improving capture capability in detail on the he calculation precision.

关 键 词：非结构网格 自适应网格 嵌套网格 旋翼 CFD 

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]