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三维非定常     
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  3 d unsteady
     An implicit numerical method is developed based on the simplified marker and cell(SMAC)method to solve the 3D unsteady incompressible turbulence Reynolds-averaging equa- tions in general curvilinear coordinates.
     基于简化标记和单元(Simplified marker and cell,SMAC)方法,发展一种在任意曲线坐标系中求解三维非定常不可压湍流Reynolds时均方程的隐式数值方法。
短句来源
     A second order Godunov method is used to solve 3 D unsteady and steady Euler equations. The main points of the method are as following.
     本文根据VanLeer提出的方法给出了求解三维非定常Euler方程和三维定常Euler方程的二阶Godunov方法。
短句来源
     Analysis of the 3D Unsteady Vortex Flow Inside Axial Flow Compressor Rotor
     轴流压气机转子三维非定常流场旋涡流动分析
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     Numerical methods for 3 D unsteady viscous flow and their applications
     三维非定常粘性流动的数值方法及其应用
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     For this method, dynamic unstructured grid technique was used, and a MUSCL type finite volume scheme was constructed to discretize the 3D unsteady Euler equations described in ALE frame.
     该方法采用非结构动网格技术并构造了一种MUSCL类型有限体积格式,求解考虑了动网格效应的三维非定常Euler方程。
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  3-d unsteady
     A high accuracy scheme for 3-D unsteady incompressible N-S equations
     三维非定常不可压N-S方程一个高精度求解格式
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     Numerical Simulation of 3-D Unsteady Wind Field Around High-rise Building on Parallel Computation
     高层建筑三维非定常风场并行计算的数值模拟
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     Numerical Simulation of the 3-D Unsteady Flow in the Steam Turbine Last Stage
     汽轮机末级三维非定常流动数值模拟
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     Numerical simulation of the 3-D unsteady flow in the last stage of the steam turbine
     汽轮机末级三维非定常流动数值模拟
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     Computation of 3-D Unsteady Viscous Flow in Transonic Compressor Stage
     单级跨音速压气机三维非定常粘性流动计算
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  three-dimensional unsteady
     Wave-Body Interaction Computation by a Three-Dimensional Unsteady Eulerian Finite Element Method
     用三维非定常欧拉有限元方法进行波体干扰计算(英文)
短句来源
     Three-dimensional unsteady incompressible N-S equation is solved by numerical method and the corresponding three-dimensional dynamic mesh is generated.
     采用数值方法求解三维非定常不可压缩的N-S方程,生成了相应的扑翼微飞行器的三维动网格;
短句来源
     2) Analyze the three-dimensional turbulence mathematical model of the elbow draft tube in the paper (k-s two equations model for three-dimensional stationary flow and Reynolds stress seven equations model for three-dimensional unsteady periodic flow), Besides, it also introduces the method to solve the general differential equations;
     2) 重点分析了本文所使用的弯肘形尾水管三维湍流模型的建立及求解(三维定常流动选择k-ε两方程模型,三维非定常周期性流动选择雷诺应力方程模型),此外,还阐述了文中所采用的湍流模型通用微分方程的求解方法;
短句来源
     Then the steady and unsteady transonic viscous flows are numerically simulated. The three-dimensional unsteady Navier-Stokes equations are solved by using the implicit LU-NND algorithm, with Baldwin-Lomax turbulent model.
     从三维非定常Navier-Stokes方程组出发,采用LU-NND有限差分格式和Baldwin-Lomax湍流模型建立了一种数值模拟三维机翼、组合体和T型尾翼的跨音速定常及非定常粘性绕流的计算方法和程序。
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     This paper applied direct numerical simulation(DNS) with considerably fine grids to calculate a three-dimensional unsteady indoor ventilation flow case.
     应用直接数值模拟(DNS)技术,采用高分辨率的网格,计算了一个三维非定常的室内通风流场.
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  three dimensional unsteady
     Taking three dimensional unsteady flow field and osilating blade as one system,through iterational caculation of three dimensional Eular unsteady flow field and blade dynamic response,the stability of blade and flow field is studied.
     将三维非定常流场与固体弹性叶片作为一个系统,通过三维欧拉非定常流场与叶片动态响应的迭代计算,来研究叶片-流场系统的稳定性。
短句来源
     Studies show that the computational results are in agreement with the experimental data, which will provide the basis for the further study on three dimensional unsteady turbulent flows.
     研究表明,计算结果与实验结果基本一致,这为三维非定常湍流流动进一步研究提供了基础
短句来源
     In recent years, as the great progresses of researches on the material science, electronics and miniature device and the advance of studies in the physical turbulent phenomena and principle of three dimensional unsteady flow, MEMS-based advanced active flow control (AFC) technology was brought forward, which integrated aerodynamics, material and control disciplines.
     近年来,随着材料、电子、微型器件等方面的研究进展和三维非定常流动机理研究的深入,产生了将空气动力学、材料和控制等多个学科综合起来的先进主动流动控制技术。
短句来源
     Computational simulation of three dimensional unsteady flow field induced by a body overtaking a shock wave
     弹体穿越平面激波三维非定常流场的数值模拟
短句来源
     The chemical reaction model of 58 equations and three dimensional unsteady conversation equations are used to simulate the pressure wave induced by flame during the methane explosion.
     从三维非定常守恒方程出发,采用58步化学反应模型,对瓦斯爆炸过程中火焰与压力波的伴生关系进行了数值模拟。
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      3 d unsteady
    The computational software used is SEAWAT, which is a 3D unsteady variable-density flow simulation model.
          
    In this study, 3D unsteady flow dynamics in an arterial vessel with two asymmetric aneurysms in series have been numerically investigated under pulsatile flow conditions for a full cycle of period T.
          
    This study focuses on the first step of such hybrid methods, which is to predict the unsteady aerodynamic sources by the mean of a 3D unsteady simulation of the flow.
          
    Full 3D unsteady Euler simulation and axisymmetric steady Euler model with stagnation region.
          
    Full 3D unsteady Euler simulation and axisymmetric steady Euler model without stagnation region.
          
    更多          
      3-d unsteady
    Numerical analysis of 3-D unsteady flow in a vaneless counter-rotating turbine
          
    Exact variational principle for 3-D unsteady heat conduction with second sound
          
    Exact variational principle for 3-D unsteady heat conduction with second sound
          
    A finite difference method is developed for the numerical modelling of the 2-D and 3-D unsteady potential flow generated by transient disturbances on the free surface, on which the nonlinear boundary conditions are fully satisfied.
          
    Then the method is implemented for 2-D and 3-D unsteady transonic flow problems.
          
    更多          
      three-dimensional unsteady
    Calculation of three-dimensional unsteady hypersonic gas flow past slender blunt bodies
          
    The theory of a lifting surface is used to construct a model of three-dimensional unsteady flow past a pair of flapping wings in the regime of normal hovering flight.
          
    The solution of the initial-boundary value problem for three-dimensional unsteady Euler equations is found by the Bubnov-Galerkin method using the generalized Rayleigh approach [1-4].
          
    The three-dimensional unsteady viscous flow resulting from the interaction of a dissipating vortex with a plane rigid surface is considered.
          
    This method is based on the reduction of the three-dimensional unsteady problem to the three-dimensional steady problem and a series of two-dimensional unsteady problems.
          
    更多          
      three dimensional unsteady
    An algorithm for a three dimensional unsteady non-linear inverse problem has been developed using the coupled iterative regularization and conjugate gradient methods to estimate heat flux from surface temperature measurements.
          
    Three dimensional unsteady convection and mass transfer flow through porous medium
          
    This means that the turbulence has its real nature because the turbulent movement is computed directly as a three dimensional unsteady phenomenon.
          
    The LES method is an attempt to directly represent the larger three dimensional unsteady turbulent motions.
          


    The unsteady boundary lager over an impulsively started rotating disk was studied, a complete solution describing the smooth transition from vortex diffusion at to Kar-man's steady solution was obtained by series expansion and its numerical continuation. The inclination angly of body streamlines, together with experimental results, were given as function of time i as well as the moment coefficient CM and on-coming velocity w

    本文研究突然以常角速度ω开始旋转的圆盘上的三维非定常边界层.先求级数展开再用隐式差分把它延拓,得出了从ωt=0时的涡线扩散连续过渡到Kármán定常解的完整解答.最后给出了力矩系数c_M,来流速度w(∞),物面流线倾角随时间ωt的变化以及与实验点的比较.

    This paper derives a set of unsteady three-dimensional inviscid equations which take into account the effect of rotor-angular-acceleration on unsteady flow field in turbomach-inery.It is also given for some simplified and transformed forms of the equations.

    本文推导了存在转子角加速度时,描述叶片排三维非定常流场的无粘基本气动方程组。并给出一些简化及变换形式。

    It is important to prevent blade from divergent vibrating for the structure integrity of various turbomachine using in the Energy Sources and the Defenee Industry. The influence of unsteady flow field surrounding the oscillating blade on the mode of vibration is discussed-therefore, this paper starting from the unsteady 3-D potential cquafion, using a series of simplifications and analvzing the influence of usteady 3-D pulse effect on the unsteady flow in the oscillation cascade of blades. The numerical example...

    It is important to prevent blade from divergent vibrating for the structure integrity of various turbomachine using in the Energy Sources and the Defenee Industry. The influence of unsteady flow field surrounding the oscillating blade on the mode of vibration is discussed-therefore, this paper starting from the unsteady 3-D potential cquafion, using a series of simplifications and analvzing the influence of usteady 3-D pulse effect on the unsteady flow in the oscillation cascade of blades. The numerical example shows that it causes significant changes of the aeroelasfic stability in the oscillation caseade.It is possible to give the engienering benefit considerably, by using the recommended approaches to prevent blade f om vibrating.

    有效地防止叶片振动发散,乃是涉及到能源与国防工业中多种叶轮机械结构完整性的重要问题。本文研究振动叶片周围的非定常流场对振动的影响。为此,而由三维非定常位势方程出发,通过一系列进一步简化,分析了非定常三维脉动对振荡平面叶栅非定常流动的影响。文中给出的数值举例表明,这将导致叶栅气动弹性稳定性边界的重大改变。若据文中所作分析采取防振措施,估计有可能获得相当大的工程效益。

     
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