地效机翼气动特性及端板效应数值研究  

Numerical study on aerodynamic characteristics of wing-in-ground and effect of end plates

作　　者：喻海川 李盾[1] 何跃龙[1] 刘帅[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《空气动力学学报》2017年第5期655-658,共4页Acta Aerodynamica Sinica

基　　金：国家重点基础研究发展计划(2014CB744100)

摘　　要：采用基于三维非结构直角网格的N-S求解器对机翼模型地效区的流场进行数值模拟。模型剖面为NACA4415,展弦比为2.33,并带有20%平均弦长的副翼及不同尺寸可移除的端板和中心板。通过对副翼偏转角、迎角、相对高度、端板尺寸及是否使用中心板和端板等因素对气动特性影响的研究,表明地面效应在相对高度小于一倍平均弦长时,影响较强;超过这个区域,影响逐渐较弱。其他条件相同时,增加端板尺寸,可有效提高升阻比;端板尺寸相同时,相对高度越小,端板效应越强。Three-dimensional unstructured Cartesian grid was used to solve the Naiver-Stokes equation and numerically investigate the wing-in-ground effect of a wing model. This wing model of a NACA 4415 profile with an aspect ratio of 2.33. It contains a 20% chord, fu l l-span, adjustable flap and removable centre and end plates. The ground effects were investigated in terms of angles of at tac k,relative height between th ew in g and gro un d,the existence centre and end plates. Numerical results show that the ground effects are limited w ith relativeheight between the wing and ground higher than one mean chord. The usageeffectively improve the lift -to-drag ratio of wing-in-ground.

关 键 词：地面效应 端板效应 副翼偏转角 数值模拟 压力分布 

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]