选择初值迭代求解自由涡线、涡核的强度和位置。
The strength and position of vortical cores and lines can iteratively be got by satisfying boundary conditions.
旋转射流的切向速度分布相当于射流中存在一个旋转的涡核。
The tangential velocity distribution measured in this study is similar to a vortex core existing along the jet axis.
首先从预定的广义尾流入手，并引入尖涡涡核作用的半经验修正，对旋翼的自由尾流进行计算分析。
Beginning with the prescribed wake model, a Semi Empirical Correction for the vortex core effect on rotor wake is made and free wake calculation is carried out.
结果显示：涡管流函数是时间的周期函数，并被表征为一系列在涡核内均匀分布螺旋涡丝流函数的叠加。
The result showed that the stream function of vortex tube was expressed as the superposition of the stream functions of vortex filament within the vortex core.
建立了一个旋翼桨尖涡初始涡核半径计算模型，用于消除旋翼自由尾迹分析中桨尖涡涡核半径依靠经验设定的现状。
A model is developed for the calculation of the initial rotor tip vortex core radius aiming at eliminating the empirical parameters of the tip vortex in rotor free-vortex wake analysis.
潜艇推进系统据信是核、涡-电布置，包括一台压水反应堆（PWR）组成，采用单驱动轴。
The submarine's propulsion system is believed to be nuclear, turbo-electric arrangement, consisting of one pressurised water reactor (PWR), with one shaft.
潜艇推进系统据信是核、涡-电布置，包括一台压水反应堆（PWR）组成，采用单驱动轴。
The submarine's propulsion system is believed to be nuclear, turbo-electric arrangement, consisting of one pressurised water reactor (PWR), with one shaft.
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