摘要
利用流动显示和片光源技术 ,对绕丁坝的流动进行了实验研究 ,以便了解丁坝参数对流态的影响 .实验是在水槽中进行的 .发现在丁坝的上游会形成马蹄涡 ,在丁坝的背风面会形成卡门涡 .按雷诺Re数的大小可以把绕丁坝的流态分成4种类型 :定常单个马蹄涡、非定常单个马蹄涡、非定常双马蹄涡Ⅰ及非定常双马蹄涡Ⅱ .
To understand effect of number and incidence of spur dikes on flow pattern, flow construction over spur dikes was studied by flow visualization and light sheet technique in a water channel. There are horse shoe vortex around spur dikes and Karman vortices behind spur dikes. Depending on Reynolds number, flow patterns over spur dikes can be divided into 4 types: steady single horse shoe vortex; unsteady single horse shoe vortex; unsteady double horse shoe vortices Ⅰ and unsteady double horse shoe vortices Ⅱ. If number and incidence of spur dike decrease, intensity of horseshoe vortex and Karman vortices decrease.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2002年第5期585-588,共4页
Journal of Beijing University of Aeronautics and Astronautics
