利用无粘、不可压涡旋流的稳定性分析的理论结果，计算了破碎涡内部流动的振动频率，与实验值相符合。
By using the theoretical investigations of the stability of a incompressible swirl flow, the oscillating frequency is calculated. The result is in a good agreement with experiments.
充分说明龙卷风由涡旋流和急流这两种流叠加而成，涡旋流是由惯性离心力造成的，急流是由水平辐合辐散而引起的强对流。
The vortex flow is resulted from inertial centrifugal force and the jet flow is from strong convection by the horizontal convergence.
绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。
Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.
计算表明，电磁制动对于抑制涡旋、改善薄板坯连铸结晶器中的流场有明显效果。
It showed that EMBR could control vortex and improve the flow field in the thin slab continuous casting mould effetely.
通用旋流除砂器中心部位出现的涡旋气柱会对泥浆净化效果产生不良影响。
It is analyzed why sand-removing effect of conventional cyclone desander is bad, and it is pointed out that the column of whirling gas in the center has a marked effect on purifying mud.
根据旋流理论提出了一种新型的用于吸收式制冷循环的双室涡旋发生器。
In this paper, according to the vortex flow theory, a new dual chamber vortex generator model is suggested to improve the COP of the absorption refrigeration system.
大暴雨发生在对流层中低层为气旋性涡旋、流场辐合加强、水汽通量增加、水汽通量辐合加强，并伴有高层较强辐散的情况下。
The heavy rain is presented under the condition of the strong positive vorticity, convergence, vapor flux convergence in middle and lower troposphere and stronger divergence at upper troposphere.
数值模拟比较准确地模拟了高压旋流喷雾的涡旋现象。
Numerical simulation also clearly demonstrates the swirling phenomena of the high-pressure swirl injection.
利用非定常流函数涡量方程数值模拟圆柱突然起动尾流涡旋的形成及周期性脱落过程。
The unsteady equations of stream and vorticity functions were used for numerical simulation on the process of the vortex formation and periodic shedding from an impulsively started circular cylinder.
例如375毫巴上单纯非地转风的流场的反气旋涡旋，适应后可建立起对流层暖性、平流层是冷性的高压系统。
For example, a non-geostrophic vortex in wind field on the 375 MB level can result in a high with the warm center in the troposphere and the cold center in the stratosphere.
侧喷嘴倾斜角度在0度、30度、45度和60度情况下，由于井底涡旋器的旋流作用，导致井底产生旋转，对钻头喷嘴射流产生了影响，以致在45度时出现压力损失最小的情况；
When the inclination angle of a side nozzle is 0, 30,45 and 60 degrees, the eddying flow of the bottom hole vortex device will cause rotation at the bottom hole, affecting on the jet from bit nozzles.
研究了在具有剪切本底流的非磁化等离子体中离子声波的激发及其与涡旋的转化。
Temporal evolution of the low frequency electrostatic perturbations in an unmagnetized plasma with strong shear flow is investigated.
以GAMBIT软件为工具，建立符合错流涡旋式高效固液分离装置实际流场机构的几何模型与网格划分策略。
The geometric model of Cross Flow Swirl Solid-Liquid Separate equipment with High Efficiency and mesh generation strategies were built with GAMBIT software.
由数值计算结果可知，循环圆流道内出现壁面脱离现象，弦面内产生不利于产生恒定制动转矩的涡旋。
The simulation results show that there were some problems such as vast vortexes and wall flow separations which added braking torque losses.
火羽流涡旋结构的详细分析对火灾蔓延特性的研究有重要指导意义。
Detailed analysis of vortical structure in fire plume has an important significance in the research of the spread of fire.
火羽流涡旋结构的详细分析对火灾蔓延特性的研究有重要指导意义。
Detailed analysis of vortical structure in fire plume has an important significance in the research of the spread of fire.
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