查询词典 unsteady

According to continuity principle of flow, law of conservation of mass and Darcy's law, the dual medium mathematical model of unsteady flow in fissurekarst artesian aquifer is established, and the finite volume method is adopted to get the solution, taking Longgang district in Shenzhen as an example to verify this model.

根据水流连续性原理、质量守衡和达西定律，建立了裂隙-岩溶承压含水层非稳定流双重介质数学模型，采用有限体积法对其求解，并以深圳龙岗区为例对模型进行验证。

The application of the lattice Boltzmann method in unsteady open channel flows was studied in detail in the paper. An existing lattice BGK model was mended; For the problem of negative local equilibrium and evolutionary distribution, we proposed a lattice Boltzmann model based on cell-population equilibrium, which is a direct non-negative approximation to the continuous Maxwell distribution. The model reduces the transport and collision, two basic evolution steps in the LB model, to transport of the non-equilibrium distribution.

本文系统的研究了格子Boltzmann 方法在明渠非恒定流中的应用问题，改进了一个现有的LB 模型，数值实验表明此改进是有效的；在平衡态分布函数及分布函数的非负性问题上，作者提出了一个基于单元均衡的格子Boltzmann 模型，通过直接对Maxwell 分布函数的离散化实现对速度分布函数的非负离散，这种方法将传统模型演化过程中的碰撞和输运两个步骤直接表现为粒子的输运。

Its control parameters are easy to change, and are very unsteady.

它的控制参数易变，非常不稳定。

This paper describes a numerical simulation method used to resolve coupled unsteady convective and conductive problem in pipeline.

文章主要描述了一种用于求解管路中非稳态对流换热和非稳态导热耦合问题的数值方法。

Lastly, the results of unsteady flow point out, counterflow thrust vectoring nozzle is a efficiency fluidic vectoring nozzle.

最后，非定常流的结果进一步表明，逆流喷管是一种较高效率的射流式矢量喷管。

Internal performance of unsteady flow of counterflow thrust vectoring nozzle has researched base on numerical simulation.

基于数值模拟方法，研究了逆流矢量喷管非定常内流性能。

Its contents include:(1) Based on unsteady flow theory model, the program of calculating the critical velocity of fluidelastic instability is developed.

提出以频率为参数的拟线性模型来分析临界流速的多值性，并给出了计算固有临界流速和受激临界流速的方法；(4)。

The result of experimental research indicates that net in deaerator improve the mass transfer and deaeration efficiency, and the steady/unsteady operation of this type deaerator is fine.

研究结果表明，除氧器丝网圈大大改善了热力除氧所需的传质条件，起到了深度除氧的作用，该种新型除氧器具有优良的稳态性能和变工况性能。

Then the FLUENT software was used to simulate the amphibious vehicle' ambient flow field through defining the unsteady boundary condition. The lift, resistance, velocity, pressure, and wave of the amphibious vehicle moving in the regular waves were obtained, which can avoid the errors resulted from neglecting the free surface and provides theoretic basis for the research on optimization design of high performance amphibious vehicle.

在计算出某改进型两栖车在微幅规则波中高速迎浪运动时升沉和纵摇特性的基础上，运用FLUENT软件，通过自定义非定常入口边界实现了两栖车在微幅规则波中运动的三维流场数值模拟，得到了升力、阻力、速度、压强和兴波等流场参数，实现了两栖车在波浪中的绕流场数值模拟，解决了以往由于忽略兴波特性导致数值计算结果随航速提高误差不断增大的问题，为高性能两栖车的外形设计研究提供了理论依据。

First, two fuzzy logic models of unsteady aerodynamics of oscillating delta wing were developed.

结果表明，所建立模糊逻辑模型的计算结果与实验数据结果符合较好。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了