查询词典 vortex flow

By means of the present model certain phenomena related to the nonlinear acoustic properties of an orifice, such as the roll-up of the shed vortex sheet and the forming of the Vena-Contracta are simulated. For a sinusoidal sound pressure, the time- history of the average velocity through the orifice is computed, and the nonlinear distortion of the velocity is examined by means of the Fourier decomposition.

依据此模型，对圆孔声学非线性效应的若干特征现象进行了数值模拟，如脱落涡层的卷曲，Vena收缩段的动态形成；在孔板前声压按余弦规律变化的情况下，计算了孔中平均速度的时间历程，并借助于Fourier分解分析了孔中平均速度的畸变情况。

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。

Vortex ring generators have been invented that project stable doughnut-shaped clouds of smoke for long distances.

涡环发电机已发明了这一项目稳定的甜甜圈状云烟雾，为长途跋涉。

According to fibers feature, it can be spinned on different systems such as ring spinning and vortex spinning.

根据纤维特点，采用半精梳加工系统、棉纺系统，环锭纺、涡流纺等进行加工。

The computed results also confirm that the streamwise vorticity pairs together with the vortex ring contribute to the formation of the side jet.

数值模拟结果还证实，流动中出现的侧向射流的形成机理要受到流向涡对和涡环的共同作用。

The results of PIV measurements show that there is vortex inside the ring packing when the height and diameter ratio and inclination is high.

测量结果验证了CFD计算结果。由于PIV可以测定瞬时流场，通过分析PIV测定结果发现填料内部存在着周期性变化的涡流。

In the future, some issues need to be investigated further, which include: establish and study the low-dimensional dynamical system of turbulent jet, with the POD bases, the control of turbulent jet based on the low-dimensional dynamical system of turbulent jet, investigate the physics mechanism of intermittence shed-off of the vortex ring in turbulent jets in crossflow.

有待进一步研究的问题是：建立基于POD模的湍流射流低维动力系统，并对其进行分析；研究基于湍流射流低维动力系统的湍流射流控制；探讨湍流横向射流中涡环间歇脱落的物理机制。

Assuming fluid is and viscid and slightly compressible, bubble collapse near rigid boundary and free surface is simulated, displaying characteristics such as formation, penetration and impact of reentrant jet as well as vortex ring and bubble rebound.

采用粘性、微可压流体模型，数值模拟了空泡在刚性边界和自由面附近溃灭及空泡溃灭后流动的发展，显示了空泡溃灭过程中的凹陷射流形成、空泡贯穿、射流冲击、涡环的形成和空泡回弹等流动特征，提出空泡回弹的另一种机制是凹陷射流冲击形成的旋涡。

Production of various automotive motorcycle shaft parts, automobile ball, clubs, gear, bearing sets, screws, non-standard nuts, pipe joints, turbine vortex rod, ring, universal joints, fittings and other stampings.

企业生产各种汽车摩托车轴类零件、汽车球头、球杆、齿轮、轴承套、螺丝、非标螺帽、弯管接头、涡轮涡杆、挡圈、万向节、冲压件等配件。

Vortex Ring ; Temperature Inversion Layer ; Laser Induced Fluorescence ; Particle Image Velocimetry ; Comsol Multiphysics

指导教授朱锦洲；共同指导教授郭志禹；中文关键字涡环；逆温层；雷射萤光显影技术；质点显像测速仪；数值分析

Effective local search tactics reaches local searchers when they are ready to buy - with every way that it is possible for them to buy from you.

有效的地方搜索策略达到当地的搜索，当他们准备购买-以各种方式，这是他们有可能从您那里进行购买。

The first two are periodic sentences for their beginnings; and the fifth and the last are also periodic sentences each for the embedding of a parenthetic structure.

1960年代中后期，当战后女权主义和当时的许多其他抗议运动在西欧和北美发展成某种势力时，性别的概念演绎成补充和延伸生物性别差异的概念。