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.
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。
We also consider the effect of vortex decay over time caused by the viscidity of atmosphere in our vortex model in estimating the vortex effect experienced during the close proximity formation flight.
在估算紧密编队飞行中长机翼尖涡对僚机的影响时，本文在所用到涡模型中也考虑了由空气粘性引起的涡流随时间的衰减效应。
The formation of fluid dynamic force and the occurrence of self-excited vibration and oil film vortex of rotor system are analyzed.
分析了转子轴承系统中流体动态力的形成和自激振动的产生与油膜涡动、油膜振荡的故障。
In this paper, two-layer models are adopted in considering the dynamic action of the disposition relation between upper layer and lower layer fluid fields on the formation of the south-west vortex.
本文采用定常二层模式讨论较小地形及高、低层流场配置对西南低涡形成的动力作用。
For the different kinds of vortex generators, some factors such as the sizes, arrangement mode, interval of disturbing flow unit has different influence rules to the fouling formation.
对于不同种类的涡流发生器，扰流元的尺寸、排列方式、间隔距离等因素对污垢的形成具有不同的影响规律。
The latent heat of condensation and the water vapor don't play decisive roles in formation of the vortex, but play key roles in vortex maintenance and structure characteristics evolvement.
凝结潜热、水汽对低涡的形成不具有决定性影响，但对低涡的维持以及结构特征演变起关键作用；
By ever-changing the opening degree of the valve, the formation course of the vortex and the effects of the velocity to the formation and expansion of the vortex are gained.
由对阀门开度白勺不断变化，得到了涡流白勺形成过程，及速度对涡流形成及扩展白勺影响。
The process for the formation of the streamwise vortex in a transitional boundary layer is described.
给出了转捩边界层中流向涡产生的物理过程。
The formation mechanism and properties of forced vortex in a hydrocyclone and its influence on the performance of the cyclone are studied systematically and thoroughly in this paper.
本文对水力旋流器中强制涡的形成，性质及作用等方面进行了较全面的深入探讨。
The formation mechanism and properties of forced vortex in a hydrocyclone and its influence on the performance of the cyclone are studied systematically and thoroughly in this paper.
本文对水力旋流器中强制涡的形成，性质及作用等方面进行了较全面的深入探讨。
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