涡

The result was that themean burst period of original and large eddies was the same.

应用三种常用的条件采样方法分别对湍流原始信号和分解后的大涡信号进行了条件采样以检测猝发。

Pei-yuan Chou pointed out that the core of turbulence consists of moving eddies with many different sizes.

周培源指出，湍流就其本质来说，是由许许多多大小尺度不同运动着的湍涡组成。

The Kolmogorov-type cascade was captured and the localized extinction due to the multiple eddies effect was discussed.

讨论了Kolmogorov类型能量级串和多重涡效应导致的局部熄火现象。

Though, more or less vortex creating grooves may be desired.

虽然，更多或更少涡创造槽，可预期的。

These range from Meaden's Vortex Theory, through all circles are hoaxes to circles are caused by some mysterious intelligence.

这些范围从Meaden的涡理论，通过各界人士的恶作剧，以引起的一些神秘的情报。

Two-phase flow ; miking layer ; discrete vortex method ; stokes number

两相流；混合层；离散涡方法； Stokes数

The research results are as follow: 1. Through the air convection experiment in laboratory, we find that the real measurement of natural convection in laboratory under obturated circumstances is almost sameness to theory calculation. The most notable part of air convection is in the middle part of crushed stones. The bigger the size of the crushed stones is, the bigger the measured wind value is.

主要结论如下： 1、通过室内模拟自然对流试验，得出在室内封闭条件下测得的自然对流效应跟理论计算值相差不大，自然对流效应最明显的部分位于块石层的中间部位；实测的对流涡包都是由一开始的无序状态往块石层的中间部位发展；随着块石粒径的增大，测得的最大风速值也随之增大。

The flow features of a self-excited precessing jet,which was generated based on the wall attachment effect,were analyzed in the paper;and the large eddy simulation approach was used to numerically study the flow inside a precessing jet nozzle.

分析了基于流体附壁效应而自激产生的旋进射流的流动特征，采用大涡模拟方法研究了射流喷嘴内部的流场。

Hot wire anenometry is used to measure the instantaneous velocity, and the measured data are filtered and transformed by fast Fourier transform method to get the frequency of precessing vortex core.

对于旋流设备中产生的旋进涡核现象，可以利用恒温式热线风速仪测量气流瞬时速度，对速度信号进行滤波和FFT变换，从而得到PVC的频谱特性。

Recapped the momentum and vorticity equations in the rotating frame.

概述旋转架构下的动量和涡度方程。

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