查询词典 turbulent flow

A two-scale k-ε turbulence model was adopted to calculate turbulent velocity field, and the probability density function method was combined with the Lagrangian flamelet model to predict the turbulent scalar fields.Detailed chemical reaction mechanism GRI-Mech 3.0 was incorporated to describe methane oxidation and nitrogen oxides formation.

采用一个双尺度的 k-ε湍流模型计算速度场，将概率密度函数方法和Lagrangian火焰面模型相结合求解标量场，燃料甲烷的氧化过程和氮氧化物的生成过程采用详细的GRI-Mech 3.0机理描述。

Base on the turbulent shoot non-premixed combustion of methane/air, make a coordinate transform on flame for reactive scalar equation, build laminar flamelet model for two dimension steady state non-premixed turbulent reacting flows.

以甲烷／空气的湍流射流扩散燃烧为基础，对通用的反应标量方程在火焰面上进行坐标变换，建立二维稳态湍流扩散火焰的小火焰模型。

However the repressive effects of intermittency on turbulent moisture field are worse than that on turbulent velocity field.

但与风速脉动相比，湍流湿度场间歇性的抑制效果较差。

The experiment is carried out to investigate coherent structure s in the near wall region of turbulent boundary layer interacting with the wake of a circular cylinder in the outer region of turbulent boundary layer.

对边界层外区的圆柱尾迹流动结构对边界层近壁区相干结构的影响进行了实验研究。

This paper describes researches on the reaeration process of turbulent water body as well as the effect of neutral salts and organics in turbulent water on the reaeration of experimental scale.

在实验水槽中，通过测量水体中溶解氧浓度的变化，研究不同搅拌速度、搅拌头处于不同水深情况下的复氧过程，以及紊动水体中中性盐和有机物对复氧的影响，并在表面传质系数分析的基础上，摸拟计算复氧系数 k2与水深H的关系。

Knowing the turbulent spectrum, representative time domain turbulent procedure is developed in this paper. According to the procedure, the relative movement equation for different particles is deduced and the method of calculating the rate of inertial collision and coagulation is proposed.

本文在已知湍谱的条件下，建立了代表性时域湍动过程；并据此推导了不同粒子的相对运动方程，提出了计算惯性碰撞凝聚率的方法。

The body-fitted grids were generated using a system of elliptical partial differential equations. The k-ε model was employed to describe the turbulent characteristics. EBU-Arrehenius turbulent combustion model was used to determine the chemical reaction rate, while a six-flux model was applied to predict heat radiation and its influence on the wall and gas temperature.

利用椭圆型微分方程和区域法生成三维贴体网格，k-ε模型预估紊流特性，EBU-Arre-henius紊流燃烧模型估算化学反应速率，六通量模型预估辐射通量以考虑其对壁面和气流温度的影响。

Based on Prandtl's momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub-layer, buffer layer, and main turbulent stream for non-Newtonian fluid flowing turbulently in ducts, which according to Karman's three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non-Newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate.

摘要以普兰德动量传递理论为基础，按照卡门的三层模型，通过室内模拟环道用0号柴油及加入减阻剂在圆管内的流动参数的测定，计算了非牛顿型流体管内湍流边界层的层流内层、过渡层、湍流中心的涡流粘度，涡流粘度与运动粘度比、总应力随相对位置的变化等定量参数，探讨了高分子减阻剂对非牛顿流体流动特性的影响，对湍流减阻现象的机理与增大减阻率的条件进行了定量分析。

Concetrating on turbulent transfer of evaporating liquid film in short-path distillator under high vacuum, applying probability density function model, two dimension mathmatics models had been build and simulated with a computational fluid dynamics software in the wiped turbulent evaporating liquid film fow.

以短程蒸馏在高真空条件下的湍流传递为研究对象，应用概率密度函数模型的基本理论，对蒸发器上液膜的湍流流场进行了二维两相流数学建模，并利用FLUENT流体力学计算软件进行模拟。

Monitored circumjacent environmental noise disturbing of all school in Atushi city,with voice environment evaluation method,the paper compartmentalizes three types campus including quiet type,turbulent type and persistent turbulent type among 10 cantonal schools,and analyzes characteristics and cause of formation for each type,meanwhile,the paper provides prevention and cure measure.

对阿图什市区各学校所受的周边环境噪声干扰情况进行了监测，运用声环境评价方法，将市区10所学校校园划分为清静型、扰闹型和持续吵闹型3种噪声干扰类型。

You can misinform this generation, but his genius lives on!

你也许误会了这个年代，但他的天才永生！

Maybe it can if you are willing to guide it, to nurture it and to believe in it.

也许它可以的，如果你愿意引导它、养育它、相信它。