查询词典 laminar flow

Firstly, the two parts are solved separately, and the results are then coupled together. Because the thickness of the combustion reaction zone at high Re and Da numbers is less than the turbulent diffusion scale in diesel engines, the flame is extremely thin, its micro-structure keeps the laminar structure, so the turbulent flame can be regard as the ensemble of locally one dimensional, thin laminar flamelet embedded within the turbulent flow field.

由于柴油机中在高雷诺数和高Damkoeler数的情况下，燃烧反应区厚度小于湍流耗散尺度，火焰极薄，其微元保持层流结构，因此，湍流火焰可视为嵌入湍流流场内局部具有一维结构的薄的层流小火焰的系综，这便构成了层流小火焰模型主导思想，同时也使层流小火焰模型模拟柴油机湍流燃烧过程成为可能。

The effects of variable properties on flow and heat transfer were also studied. 1. SIMPLEC algorithm was used to simulate the laminar natural convection flow in horizontal concentric annuli with the assumption of constant properties. Numerical studies range are as follows: Ra〓 number 100～10〓, radius ratio 1. 2～10.Velocity and temperature distribution profile and the heat transfer result were derived. The comparison of heat transfer results under the boundary condition of constant heat flux and constant wall temperature was also made.

对水平同心套管内层流自然对流采用SIMPLEC算法进行了数值模拟，在〓，半径比1.2～10范围内使用定物性假设进行了计算，得到有关温度和速度的分布以及相应的换热结果，并比较了内壁面分别处于定热流和定壁温条件下换热结果的差异，根据换热计算的结果整理并拟合有关的换热关联式。

The flow fields around a prolate spheroid were investigated by numerical simulation and experiments when the flow is both in laminar state and in turbulent state.

本文利用数值模拟和实验方法研究了层流和湍流状态下绕椭球的流场，主要目的是探索复杂流动情况下的湍流计算方法。

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。

This scheme can be applied to flow field computation of nonviscous or viscous flow, laminar or turbulent flow and compressible or incompressible flow.

本文首次提出了基于分布参数最优控制理论、雷诺平均N—S方程的平面叶栅反问题的普遍形式——最优化设计的理论和方法。

It was found that the quenching diameter of porous media is a multi-parametric complicated function, related to the mixture flow speed, the premixed gaseous laminar flame velocity, the pipe flow Reynolds numbers, the coefficient of temperature conductivity, the equivalence ratio and the soUd temperature.

为缓解能源结构不合理造成的环境污染问题，我国加快了天然气的使用力度，发展高效、低污染排放的天然气燃烧技术具有非常重要的现实意义。

Flow through cannulae is not laminar at the upper range of clinically used flows, therefore Poiseuille's law is not useful in predicting flow and the effect of changing radius is less than commonly believed.

通过套管的血流在较高范围的临床使用流量内不是层流，因此泊素叶法则在预测流量上不适用，改变套管半径的效果比通常相信的要小。

Results showed that the overland flow pattern has close relationship with the grass cover and water inflow rate, it changed from the laminar and tranquil flow to the transition flow and tranquil flow for the grass-covered sloping segment with increasing water inflow rate, but it was almost transition flow and tranquil or rapid flow for the sloping segment without grass cover.

结果表明，坡面流流态与放水流量和草被覆盖关系密切，随流量的增大草被覆盖断面坡面流流态由层流－缓流转变为过渡流－缓流，而无草覆盖断面的流态几乎都处于过渡流－缓流或急流状态；沟坡径流大都属于过渡流－急流状态，试验过程中，草被覆盖断面的径流雷诺数和弗汝德数变化很小，无草被覆盖断面径流的雷诺数呈逐渐增加趋势，而弗汝德数呈逐渐减小的变化趋势。

The equipment is controlled by the electric builtup with racks, boxes, cleaning slot, manipulator, servo system, laminar flow purification, pipeline components.

设备是由电气控制，机架，箱体，清洗槽，机械手，伺服系统，层流净化，管路部分组成。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。