1) vortex ring
涡环
1.
In present paper a three-dimensional discrete vortex filament method is put forward to simulate the motion and bubble entrainment of an inviscid,incompressible vortex ring.
本文发展了三维离散涡模型用于模拟无粘不可压缩涡环的发展及其与气泡的相互作用,涡环被离散为平均分布在其中心线上的球形涡元,由Biot-Sarvart定律叠加每个涡元的诱导速度得到涡环的运动速度。
2.
The interactions between the shock wave and vortex ring are discussed.
在此基础上,考察了不同出口形状对爆轰波溢出后的外流场的动力学演变规律的影响,分析讨论了涡环与激波的相互作用过程。
3.
The PIV measurement results show the properties and structures of the unsteady flow field in which a train of vortex rings are formed at the sharp edge of the orifice, thus the energy and mass flux are .
通过对射流出口涡环的产生、发展及运动特性的分析,认识到涡环之间相互作用是形成"零质量"射流的流动机理。
2) enveloping worm wheel
环面涡轮
1.
Based on the modeling of enveloping worm helix analytical equation and constructing of TI-worm,the article analyzes geometry characteristics of the involute helicoids double-enveloping worm wheel,demonstrates the whole process by means of finite time Boolean calculation approach method with characteristic model of TI-worm,and establishes the involute helicoids double-enveloping worm gear pairs.
在环面涡杆螺旋线解析方程建模和渐开面包络环面涡杆三维实体构建的基础上,分析讨论了渐开面二次包络环面涡轮的几何特征。
3) eddy current ring
涡流环
1.
The eddy current ring of pressure pipeline that is detected by spot probe is studied firstly in theory.
首先从理论上分析了放置式探头探测压力管道时的涡流环模型,然后应用此模型推导出了检测时的特征频率计算公式。
4) vortex-ring state
涡环状态
1.
In this paper, on the base of rotor vortex-ring test data, the network back propagation method is used to research the effect of blade negative-twist on vortex-ring state, and the effect of change of negative-twist on rotor torque, thrust average value and fluctuating scope are analyzed.
采用神经网络误差反向传播算法,以旋翼涡环状态试验数据为基础,研究了桨叶负扭度对直升机涡环状态特性的影响,分析了负扭度变化对旋翼扭矩、拉力平均值及脉动幅度的影响。
2.
The helicopter behavior in vertical or steeply oblique descent has been of great concern in rotorcraft engineering because there is an unsteady and unsafe region known as the "vortex-ring state" condition can apply to both main and tail rotors.
直升机作带功率下降时，若操纵不慎，容易陷入涡环状态，如果没有足够的高度，就会造成坠地事故。
3.
Helicopter vortex-ring state influence flight safety badly,whose flow characteristic is very complex and hard to calculate accurately.
直升机涡环状态严重影响飞行安全,其气流特性非常复杂,难以准确计算。
6) secondary close vortex
二次涡环
补充资料：白鼋涡（杂言走笔）
【诗文】：
南山之瀑水兮，激石滈瀑似雷惊，人相对兮不闻语声。
翻涡跳沫兮苍苔湿，藓老且厚，春草为之不生。
兽不敢惊动，鸟不敢飞鸣。白鼋涡涛戏濑兮，
委身以纵横。王人之仁兮，不网不钓，得遂性以生成。
【注释】：
【出处】：
全唐诗：卷125_118
南山之瀑水兮，激石滈瀑似雷惊，人相对兮不闻语声。
翻涡跳沫兮苍苔湿，藓老且厚，春草为之不生。
兽不敢惊动，鸟不敢飞鸣。白鼋涡涛戏濑兮，
委身以纵横。王人之仁兮，不网不钓，得遂性以生成。
【注释】：
【出处】：
全唐诗：卷125_118
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条