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roe格式
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  roe scheme
     Two step Roe scheme developed by Rogers was used to solve the artificial compressible INS equations,in order to simulate the laminar separation of the E387 airfoil near the tailing-edge at low Reynolds number(Re=6.0×10~4,1.0×10~5,2.0×10~6) and different angle-of-attack(α=0°,4°,7°),corresponding to the long laminar separation bubble.
     本文采用Rogers发展的双时间步Roe格式,求解拟压缩性修正不可压N-S方程。 数值模拟了低雷诺数条件下(Re=6.0×104,1.0×105,2.0×106),E387翼型在不同攻角条件下(α=0°、4°、7°)翼上表面后缘部分的层流分离现象,对应于长分离泡。
短句来源
     3. Three spatially discrete schemes about the convection terms of the N-S equations: the centered difference with artificial viscosity by Jameson, the van Leer scheme of flux vector splitting, and the Roe scheme of flux difference splitting are studied respectively.
     3.研究了N-S方程组中对流项的三种空间离散格式:改进的Jameson中心+人工粘性格式、通量矢量分裂类van Leer格式和通量微分分裂类Roe格式
短句来源
     Numerical flux is scattered through 3rd order Roe scheme and the 2nd order Harten-Yee TVD scheme separately.
     数值通量分别采用三阶精度Roe格式和二阶精度Harten-Yee的TVD格式离散.
短句来源
     The internal and external flow fields of SCFN 2 D nozzle was numerical simulated In order to capture the shockwaves effectively and simulate the separated flow fields better, Roe scheme and MUSCL approach,Venkatakrishnan limiter,Spalart Allmaras one equation turbulence model were used Some numerical results for four states of two SCFN models were presented It shows that very good computational results have been gotten with this arithmetic except the flow fields including serious separated domain
     研究了球面收敛矩形扩张的二元喷管 (SCFN)流场的数值模拟 ,为了有效地捕获激波与滑流面及较好地模拟分离 ,采用了 Roe格式、 MUSCL方法及 Venkatakrishnan限制器、 Spalart- Allmaras方程紊流模型。 研究中给出了两个喷管模型四个流动状态的数值模拟结果。
短句来源
     Dual time-step approach in conjunction with lower-upper symmetric-gauss-seidel(LU-SGS) implicit method were utilized to solve the unsteady navier-stokes(NS) equations in noninertial system,and Roe scheme was brought in for space discretization,incombined with stiff moving mesh generation technology.
     数值模拟时采用双时间法和LU-SGS隐式解法相结合的模式求解了非惯性坐标系下的非定常纳维-司托克斯(NS)方程组,空间离散采用Roe格式,并结合刚性动网格生成技术.
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  roe schemes
     To get higher order accuracy, the MUSCL interpolation functions are applied for van Leer and Roe schemes.
     van Leer和Roe格式摘要(Abstraet)均采用MUSCL插值使格式具有高阶精度,并采用连续可微的van Albada通量限制器,使格式具有良好的稳定性和收敛特性。
短句来源
     The convective terms of N-S equations were discretized with modified Jameson′s central differencing, modified Van Leer and Roe schemes.
     采用改进的Jameson中心、Van Leer和 Roe格式对 N- S方程组的对流项进行空间离散 ;
短句来源
  roe ' s scheme
     Unified Computation of Flow With Compressible and Incompressible Fluid Based on Roe's Scheme
     基于Roe格式的可压与不可压流的统一计算方法
短句来源
     The Application of a Finite Volume Method Based on Roe's Scheme to 2-D Dam-Break Problems
     一种基于Roe格式的有限体积法在二维溃坝问题中的应用
短句来源
     It has also been demonstrated that the discontinuous surface in flow field can be captured for the implementation Roe's scheme.
     由于采用了Roe格式,该方法还可以捕获不连续流场的间断面.
短句来源
  “roe格式”译为未确定词的双语例句
     After simulating two- dimensional transonic flow with two turbulence models, FDS-Roe scheme is verified.
     基于两种湍流模型,通过对二维跨音速翼型绕流进行数值模拟,对高分辨率、稳定的FDS-Roe格式进行了验证。
短句来源
     A numerical method for the simulation of two-dimensional super/hypersonic laminar flows in inlet is presented. The inflow Mach numbers are 4 and 6. The flowfields are simulated numerically by two-dimensional Navier-Stokes equations with two-order Roe’s scheme.
     对超/高超声速三级压缩进气道流场进行了数值模拟,来流马赫数为4、6,进气道内流动为层流状态,根据二维Navier Stokes方程,采用二阶精度Roe格式进行离散。
短句来源
     Roe's method with three-order TVD scheme was used for the evaluation of convective fluxes,and central difference scheme was used for diffusive fluxes.
     采用高阶TVD下的Roe格式计算对流通量,采用中心差分格式计算扩散通量。
短句来源
     The dual-step Roe schema developed by Rogers was used to solve the incompressible Navier-Stokes equations.
     采用Rogers发展的双时间步Roe格式,求解拟压缩性修正不可压N-S方程.
短句来源
     It is known that for some of the traditional shock-capturing schemes, such as the Godunov or Roe type methods, will generate downstream oscillatory wave patterns that cannot be effectively damped by the dissipation of these schemes.
     众所周知传统的一些激波捕捉格式(如Godunov,Roe格式)仪靠格式本身的耗散无法完全抑制激波下游的振荡。
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  roe scheme
A second-order finite volume scheme with MUSCL (Roe scheme) is used to discretize the spatial derivatives, and a second order-central difference scheme for the viscous terms, and a MFGS (Matrix Free Gauss Seidel) is employed for time integration.
      
The integration was accomplished using the Roe scheme combined with fractional stepping; nonlinear flux limiting was used to prevent unphysical solution oscillations near discontinuities.
      
The numerical method of 3rd-order Roe scheme developed by Rogers was used to study these questions.
      
As a consequence, they are able to give an accurate resolution of the important mass waves comparable to that of a Roe scheme.
      
At an interface the Roe scheme is replaced with a Riemann solver.
      
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  roe ' s scheme
The computed solutions are compared with the Stoker's solution and the solution from the first-order Roe's scheme.
      
All schemes including the Roe's scheme are found to yield results which agree well with the analytical solution when the ratio of upstream to downstream depths is moderate such as 0.05.
      
Unified computation of flow with compressible and incompressible fluid based on roe's scheme
      
It has also been demonstrated that the discontinuous surface in flow field can be captured for the implementation Roe's scheme.
      
An upwind parabolized Navier-Stokes solver based on Roe's scheme is used to compute an oncoming flow Mach numberM∞=8, temperatureT∞=216 K, and pressureP∞=5.5293×103 N/m2.
      
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Shock/boundary layer interaction is simulated by solving 2 dimensional N S equations using different numerical schemes, including Roe's FDS scheme and van Leer's FVS scheme fitted with different limiters. The computed flow phenomenon is analyzed and a study on the varying scheme effects is made.Some new opinion is presented.

用不同的数值格式,包括Roe的FDS格式和vanLeer的FVS格式并配备不同限制器,求解二维N-S方程,模拟研究了激波/边界层干扰的流动问题,分析了模拟出的流动现象,仔细研究了其中的格式效应,得出同前人不尽一致的结论:vanLeer格式对限制器的依赖性比Roe格式更强;在本文情况下,minmodlimiter的激波、膨胀波的分辨率比albadalimiter还好

In two-or three-dimensional flow fields,it is difficult to determine the direction of wave propagation in cascades due to complexity of transonic flow.Now a grid-independent approximate Riemann solver is applied to numerical simulation of two-dimensional transonic cascade flow by the Euler or Navier-Stokes equations.Fluxes on grid faces are obtained via wave decomposition,assuming that information propagates in the velocity difference directions,rather than in the grid-normal directions as in a standard grid-aligned...

In two-or three-dimensional flow fields,it is difficult to determine the direction of wave propagation in cascades due to complexity of transonic flow.Now a grid-independent approximate Riemann solver is applied to numerical simulation of two-dimensional transonic cascade flow by the Euler or Navier-Stokes equations.Fluxes on grid faces are obtained via wave decomposition,assuming that information propagates in the velocity difference directions,rather than in the grid-normal directions as in a standard grid-aligned solver.Second-order computations with the grid-independent flux function are used to analyze two typical examples of transonic cascades.The results indicate that the grid-independent model suppresses entropy production over the cascade surface due to either computational diffusion or grid viscosity,and resolves shock and shear waves in transonic flow of cascades much better.

采用一种改进的Roe格式对平面叶栅的无粘流动进行了数值模拟,并与Roe格式的计算结果进行了比较。采用四阶Runge-Kuta时间差分格式,空间三阶有限体积法。网格生成采用贴体网格近壁面修正的方法。计算结果表明,该格式在减少格式对网格的依赖性,抑制数值粘性方面具有明显的作用。

A numerical method is developed for simulation of rotor-stator interactions in a compressor or turbine stage.This method solves quasi-three-dimensional Navier-Stokes equations by an implicit high resolution finite volume method.A fully conservative method is designed to compute the inviscid and viscous flux at the interface of rotor and stator grids.Numerical results of rotor-stator interactions in a transonic compressor stage at off-design conditions are presented.The mechanism of rotor-stator interactions...

A numerical method is developed for simulation of rotor-stator interactions in a compressor or turbine stage.This method solves quasi-three-dimensional Navier-Stokes equations by an implicit high resolution finite volume method.A fully conservative method is designed to compute the inviscid and viscous flux at the interface of rotor and stator grids.Numerical results of rotor-stator interactions in a transonic compressor stage at off-design conditions are presented.The mechanism of rotor-stator interactions in this compressor stage is discussed in terms of the computational results.

本文计算了某跨音速压气机的一级在非设计工况下动静叶干扰产生的非定常流动。计算以准三维的Navier-Stokes方程为模型,湍流模式采用Baldwin-Lomax代数模式。主控方程用高分辨率的MUSCL型Roe格式离散,离散方程用高效的LU-SSOR方法求解。本文提出了一种完全守恒的动、静叶交界面处理方法。周期性边界处理采用Rai的方案。根据计算结果,讨论了非设计工况下动静叶干扰的机理。

 
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