涡

Based on the Reynolds stress model CFD numerical simulation method, the experimental study of the inflow field and separation feature of nine forms of entrance structures of the oil-water separation hydrocyclone including vortex curved entrance and Archimedes spiral entrance is carried out and four kinds of ideal optimized entrance structures are obtained.

采用雷诺应力模型CFD数值模拟方法，对涡线形曲面入口、阿基米德螺旋线形入口等9种油水旋流分离器入口结构形式的内流场和分离特性进行了试验研究，得出比较理想的4种优化入口结构形式。

The dormer window that looks like Napoleon's helmets in a gabled extension brings you the elegance of Marshall mansion; the circular columns at the porch and the not protruding terrace make you feel the charm of Sheng Xuan Huai's house; the roof tiles over the proto-Doric columns, the black iron gate and the white walls let you enjoy the elegant charm of Zhang Xue Liang residence; with the reliefs on the wriggles, the pillars on the bottom base and baroque-console on the architrave you feels like on Duo Lun Road and enjoy the purity and dignity.

在屋顶前坡设置的拿破仑头盔式老虎天窗，领略马歇尔公馆的儒雅风韵；从宽大门廊左右的圆形巨柱，内藏式阳台感觉盛宣怀住宅的不凡气度；从陶立克柱之上重叠的屋瓦，黑白分明的铁门粉墙，品味张学良公馆的幽雅内敛；你也可以从窗楣的平拱浮雕、底层基座的绞型柱石和额枋上的巴洛克卷涡，看到多伦路古典主义建筑的纯净与沉稳。

This paper calculates the symmetric and asymmetric vortical flow around body of revolution at high angles of atta...

本文用多重线涡模型计算旋转体在低速大迎角下的对称和非对称涡流。

Result proof, because can be calculated accurately to large scale backset, big eddy imitate compares S-A model to have taller precision on computation of function of pneumatic of wind energy conversion system.

结果证实，由于能够对大尺度涡流精确计算，大涡模拟比S-A模型在风力机气动性能计算上具有更高的精度。

The study shows that the longitudinal component of the pressure force is mainly balanced by the vertical eddy frictional term and the lateral component of the pressure force is mainly balanced by the Coriolis force.

研究表明：在磨刀门河口动力平衡中，纵向的主要平衡项为压力项和垂向涡动摩擦项，侧向的主要平衡项为侧向正压力项和科氏力项。

Boundary layer on the shroud is pumped after bleeding, which restrained the disturbance induced by the interaction of low energy airflow and mainstream, delaying the adverse effect of Clearance flow backwards and improving the mainstream of compressor, weakening the characteristic of leakage vortex, bating the blockage of blade passage at a certain extent.

采用引气后，抽吸机匣壁面上的附面层，抑制了低能量气流与压气机主流的干扰，减缓间隙倒流的负面影响，在一定程度上削弱了泄漏涡的特性，减弱了叶片通道的堵塞状况，改善压气机主流流动。

The results show that as the wind is along one leg of the model, the vibrations which are mainly caused by turbulence of oncoming flow are weak, and as the wind is along the angular bisector of two legs, the vibrations induced by vortex are strong.

实验结果表明：当风向顺Y型柱体某一肢时主要是来流脉动引起柱体较弱横向振动；当风向顺Y型柱体两肢分角线时则由涡脱落而引起柱体强烈的横向振动。

His head creates a bow wave, which his breath ?.

他用头使水形成一个低涡，从中便于呼吸。

His head creates a bow wave, which his breath behind.

他用头使水形成一个低涡，从中便于呼吸。

The length of central region of the cell decreases with the increasing oscillation amplitude and Strouhal number. The movement of Brownian particles can be either periodic or chaotic from whichever region the particles originate.

模拟结果表明，涡胞中心区质点的运动有强周期性，轨迹呈螺旋形状，而边缘区质点的运动是一种混沌行为，两区的质点被分界线隔开；中心区宽度随振幅、Strouhal数的增大而减小；布朗粒子的分子扩散效应可以克服两区分界线的限制。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐