查询词典 turbulent

The maximum values of vertical turbulent diffusion coefficient of momentum, temperature and turbulent kinetic energy appear at noon.

在中午前后，动量、温度和湍流动能的垂直扩散系数达到了最大值。

In the first part, turbulent motion in convection zone as source to generate Alfven waves is studied following Lighthill-Stein theory, in which the turbulent source was described by nonlinear terms in MHD equations.

第一个方面主要地研究了加热日冕的Alfven波源。我们采用Lighthill-Stein理论分析了对流层中的湍流运动对扭转Alfven波的激发作用。

A nonlinear eddy-viscosity turbulent flow model, which adopted third-order correlation of stress tensor and strain tensor, was modified and applied to flow computing of turbulent flow of internal combustion engine.

把采用了应力张量和应变张量的三阶相关关系的一个非线性涡粘度湍流模型进行修正后应用于内燃机缸内湍流流动计算，用此模型对几种ω形凹坑燃烧室内燃机汽缸内的流动进行计算，特别考查不同结构燃烧室内各处的湍能的变化，给出了燃烧室结构对缸内湍能影响结果，结果表明，凹坑结构时内燃机缸内湍能的分布和平均湍能的大小影响很大，可适当调整燃烧室结构来改变缸内湍流结构。

We have revisited the problem of the solar p-modes generation by turbulent stress in outer part of the Sun, and demonstrate that the generation of acoustic waves by the turbulent convection is dominated by quadruple emission because of destructive interference between monopoly and dipole emissions.

在传统的对流混合程理论的基础上，借助于湍流的现象中雷诺数与不稳定性、湍流与涡旋等物理量的类比考虑，我们提出了一种描述湍流能谱的改进形式，认为对流区湍流能谱能够分离成时间和空间两部分。

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。

The effect of Reynolds number on rudder hydrodynamic performance is also analyzed. Up to the stall angle the computed lift and drag agree well with measurements and other author's calculations, whereas stall angle, lift and drag beyond the stall angle are slightly under-predicted. The solver is used to investigate laminar and turbulent separated flows around a 6: 1 prolate spheroid at high incidence angles and their effects on hydrodynamic forces. The second separation flows are successfully identified in both laminar and turbulent flow simulations.

应用所开发的求解器，以6：1长椭球体为算例计算了回转体在大攻角下定常斜航运动时的三维粘性流场及水动力，对层流流动和湍流流动分别进行了计算，分析了层流与湍流分离流动和涡旋产生的特点及其对水动力的影响；计算结果与他人的试验和计算数据比较，吻合程度良好，表明应用本求解器能够正确模拟这种以层流／湍流分离流为主的复杂粘性流动，得到相当精确的水动力，检验和验证了该求解器精确模拟回转体在大攻角下的粘性分离流动和计算水动力的能力。

The solver is used to investigate laminar and turbulent separated flows around a 6:1 prolate spheroid at high incidence angles and their effects on hydrodynamic forces. The second separation flows are successfully identified in both laminar and turbulent flow simulations. The computations are shown to agree well with available experimental and numerical data and the physics of 3D large-scale flow separations and vortex shedding are confirmed.

应用所开发的求解器，以6：1长椭球体为算例计算了回转体在大攻角下定常斜航运动时的三维粘性流场及水动力，对层流流动和湍流流动分别进行了计算，分析了层流与湍流分离流动和涡旋产生的特点及其对水动力的影响；计算结果与他人的试验和计算数据比较，吻合程度良好，表明应用本求解器能够正确模拟这种以层流/湍流分离流为主的复杂粘性流动，得到相当精确的水动力，检验和验证了该求解器精确模拟回转体在大攻角下的粘性分离流动和计算水动力的能力。

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