悬停直升机旋翼作用下气固流动特性模拟研究  

Modeling of Air and Particles Flow with Revolving Rotor Hovering Over the Particles Layer

作　　者：姜晓雪 陆慧林[1] JIANG Xiaoxue;LU Huilin(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150000

出　　处：《工程热物理学报》2023年第1期112-117,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.91752115)。

摘　　要：直升机悬停时旋转桨叶将影响气体与颗粒两相流体动力特性。本文运用基于颗粒动理学理论的三维瞬态欧拉–欧拉气固多相流模型,数值模拟旋翼旋转对颗粒层的颗粒携带影响。结果表明,旋转气体携带颗粒两相流场可以划分为低压桨叶旋转区域Ⅰ、高压浆叶尖端区域Ⅱ和外部流动区域Ⅲ。旋转高速气体与颗粒层表面颗粒形成相互作用形成局部自由剪切层诱发颗粒的夹带。随着悬停高度降低,旋转气体饱和颗粒夹带量增大。The rotation effect by a revolving two-bladed rotor of the hovering helicopter on hydrodynamics of gas and particles over the particles layer has been numerically studied using a three-dimensional transient Euler-Euler two-fluid model(TFM) with kinetic theory of granular flow(KTGF). The results highlight that the major flow regions are divided into several regions. The region one is known as low-pressure blade rotation region. The region two is blade tip area with high pressure. The region three is the external flow domain. The rotating high-speed gas interacts with the particles on the surface of the particle layer to form a local free shear layer to induce particle entrainment. The amount of saturated particles entrained by the rotating gas increases with the decreases of hovering heights.

关 键 词：双叶片旋转 颗粒携带 CFD 颗粒动理学 

分 类 号：O359[理学—流体力学]