涡环 meaning in English
collar vortex
vortex loop
vortex ring
vortex-ring
Examples
- Vortex - ring cascade
涡环级联 - The salinity distribution characteristics are the high - salinity in the bohai bay and the low - salinity in the boahi strait . the density distribution shows that there is a large cyclonic density circulation in bohai sea and it is likely to exist some density current gyre in the middle part of the bohai sea . in winter the saddle - like pattern of the bohai sea temperature and salinity shows that the circulation structure is much complexer than the previous research results
密度分布表明：夏季渤海湾口已经由以前的低密度中心变为现在的高密度中心，相应的环流结构也必会发生大的变化；夏季渤海中部会存在一个反气旋式的密度环流，并在局部可能存在多个密度流涡环；冬季渤海“马鞍状”温盐结构反映其密度环流结构要比以往研究结果复杂得多。 - The shearing layer is carried by the jet and the eddy is formed because of the instability and selective amplification of shearing layer which will propagate to the downstream . as the eddy impacts the impinging wall , a wave of pressure disturbance with certain frequency is induced . this wave then propagates to the upstream with high speed , and results in the overlap and amplification of the waves when the frequencies of them are close with each other
当前喷嘴流束中的不稳定扰动波在穿过腔内的剪切层时，剪切层对其有选择放大作用，形成涡环结构，剪切流动中涡环与碰撞壁撞击，在碰撞区域产生压力扰动波并向上游反射，在上游剪切层分离处诱发新的扰动的产生，当新扰动与原扰动匹配时，射流上游就被不断地受到周期性激励，腔内就产生流体自激振荡并在后喷嘴出口形成脉冲射流。