查询词典 Reynold number

The results show that:(1) The mean drag and lift coefficients of box shape bridge deck section have considerable Reynolds number effect;(2) the ratio of width to height affects on Reynold.

在较大的雷诺数范围内测量了不同宽高比箱形桥梁断面的三分力系数，研究了三分力系数雷诺数效应以及宽高比对断面三分力系数雷诺数效应的影响。

By experiments, the flow regime of lubricant oil is correlated closely with the Reynold′s number of compressed air.

通过实验和数值模拟的方法研究了油气润滑系统输送润滑油的过程中，管道中流体的流动状态及气体在润滑油中的扩散规律。

The accurate prediction of drag is key to the design of the low Reynold′s number flight vehicle,and the accurate prediction of friction drag which is induced by separation and transition of the boundary layer is key to the accurate prediction of drag.

而与附面层分离和转捩相关的摩擦阻力的精确计算则是此类飞行器阻力精确计算的关键。

The flow parameters such as the adhesion-wall effect of jet, penetration proportionlity of jet, momentum ratio, Reynold's number and incorporation time, which affect the mixing quality were analysed.

探讨了射流的流动状态如射流的附壁效应、穿透率、动量比及雷诺数等对混合的影响，并对混合时间进行了分析。

The reasonable value ranges of turbulent Prandtl number for different Reynold numbers were suggested. The conclusions are valuable for the study of various complicated flows using mathematical models.

得出了紊动普朗特数在大小不同雷诺数下的合理取值变化范围，其结论对采用数学模型研究各种复杂流动具有指导意义。

A: To flat model blade tip, the film cooling effectiveness was controlled mainly by blow ration , and the heat transfer coefficient was governed by main flow Reynold number.

第三：对于H型叶端气膜换热系数，由于后壁对流体的阻挡和扰动，换热系数将主要取决于主流雷偌数和吹风比。

First, based on the analysis of the grid Reynold number, the necessity for adopting high order scheme is emphasized when there is the complex flows with strong separation and high parameters gradient regions. Then, according to the entropy increased condition, the third order ENN scheme is constructed. Meanwhile, a fast, effective, and simple implicit numerical method called hybrid flux splitting method is developed. After that, the one dimensional model problem with many extrema and Burgers equation are simulated. Through the comparisons with exact solutions, the accuracy and effectiveness of the ENN scheme are confirmed.

首先通过对网格雷诺数的分析，论证了在求解含分离及较大参数梯度的流动时，采用高阶格式的必要性，然后从熵增原理出发，提出了建立三阶ENN格式的准则，同时发展并建立了一种快速、有效的简单隐式算法"混合通量分裂法"，通过对一维模型问题及Burgers方程的数值试验，检验了三阶格式的计算精度。

An the orthogonal test of mist eliminator is conducted, and it is found that the angle of corrugated baffle and Reynold number of gas have a great influence on both the separation efficiency and the pressure drop of mist eliminator.

首先对除雾器除雾性能进行正交试验，并采用直观分析法和方差分析法对正交试验结果进行了分析，发现波形板曲折角α对除雾效率η影响显著，对压降影响特别显著，α为45°时，除雾器除雾效率高且压降适中；斜边长与板间距比值L/b对除雾效率η有一定影响，但对气流压降影响不大；气流雷诺数Re对除雾效率η和气流压降影响显著。

Sand threshold;cusp catastrophe;critical friction velocity;Shields parameter;particle Reynold number

风沙起动；尖点突变；临界起动摩阻风速；希尔兹参数；颗粒雷诺数

Firstly, based on the force acting on a single-particle, establish a discriminant formula of the sand threshold, and prove that the sand threshold belongs to the cusp catastrophe. Then establish the basic equation of the cusp catastrophe using coordinate transformation and catastrophe theory. Finally, while particle Reynold number and equivalend diameter are the state variables and Shields parameter is the control variables, we can obtain the model of cusp catastrophe of sand threshold, putting those variables into the basic equations of the cusp catastrophe. The model is derived from the mathematics, which has a certain mathematical theory foundation.

首先从单颗沙粒受力分析出发，建立沙床沙粒起动条件判别公式，进而证明了风沙起动属于尖点型突变；然后通过坐标变换和突变理论建立了尖点突变的基本方程；最后本文选择颗粒雷诺数和等效粒径作为控制变量，希尔兹参数作为状态变量，并把它们代入尖点突变的基本方程，经过拓扑变换得到风沙起动的尖点突变模型，并与前人的公式及实验数据进行比较。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。