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turbulence models
相关语句
  湍流模型
     3. Turbulence models.
     3.湍流模型
短句来源
     The Comparison, Improvement and Application of Turbulence Models
     湍流模型的比较、改进和应用
短句来源
     Four turbulence models:algebraic BaldwinLomax model with DeganiSchiff modification, two versions of JohnsonKing model (JK90A and JK92) and twoequation kg model, are described and evaluated for missile supersonic flow, NASA TN D712 standard model and the civil airplane wingbody configuration (twoblock CO mesh) transonic flows.
     采用4种湍流模型:代数Baldwin Lomax(B L)模型、半方程Johnson King(J K)模型的两个版本(J K90A和J K92)以及两方程k g模型,分别数值模拟了导弹超音速流动、NASATND 712标模和民机翼身组合体(两区C O网格)跨音速流动.
短句来源
     The turbulent flow within cascades of VKI low speed axial turbine is being numerically investigated with Navier-Stokes equations by respectively making use of Spalart-Allmaras and k-eps turbulence models.
     通过求解N S方程,分别采用Spalart Allmaras与k eps 湍流模型,对VKI低速轴流透平叶栅内部的湍流进行了数值分析。
短句来源
     Different turbulence models for simulating a liquid liquid hydrocyclone
     不同湍流模型在液-液旋流分离管流场计算中的应用及比较
短句来源
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  湍流模式
     Prediction of Atmospheric Environment in Urban Street Canyon by Applying Various Versions of Turbulence Models
     应用不同湍流模式预测城市街道峡谷的大气环境
短句来源
     Investigation of nonlinear turbulence models for separated supersonic flows
     超声速分离流非线性湍流模式的研究(英文)
短句来源
     Modelling of Turbulent Transonic Flows with Linear and Nonlinear Eddy-Viscosity Turbulence Models
     模拟跨声速湍流的线性和非线性涡粘性湍流模式(英文)
短句来源
     Two turbulence models which include a Spalart-Allmaras model and a RNG k-ε model are utilized to solve this problem separately.
     其中两种湍流模式,即Spalart-A llmaras湍流模型和RNGk-ε湍流模型分别应用于该问题的求解。
短句来源
     Study of separated flow in a diffuser using linear and nonlinear eddy-viscosity turbulence models
     二维喷管分离流线性/非线性湍流模式的研究
短句来源
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  紊流模型
     Applications of Turbulence Models in Engineering Hydraulics
     在水工水力学中应用紊流模型的若干问题
短句来源
     Analysis and Comparison of Turbulence Models for Room Air Motion
     室内气流紊流模型的分析与比较
     It is shown that the results with later two turbulence models become closer to the experimental results.
     应用3种紊流模型对三维压气机叶栅通道紊流流动进行数值分析,并与实验数据比较,结果表明,采用后两种紊流模型计算得到的值与实验数据更接近。
短句来源
     This paper introduces plenty of turbulence models used in numerical simulation of the sedimentation tank,systematically describes the present situation of researches on application of calculating hydrodynamic models to numerical value simulation of sewage sedimentation tank,discusses the effect of different boundary conditions and environmental factors on modeling results,and reviews the advantages and disadvantages of application for CFD modeling wastewater sedimentation tanks.
     本文介绍了沉淀池数值模拟中所运用的大量紊流模型,综述了计算流体力学(CFD)模型应用于污水沉淀池数值模拟的研究现状,讨论了不同边界条件、环境因素对模拟结果的影响,评述了CFD模型应用于污水沉淀池数值模拟的优劣。
短句来源
     Based upon the three-dimension stationary Navier-Strokes coupled equation and k- turbulent model and kechen turbulent model, the essay simulates the air distribution of the non-unidirectional clean room and compares and analyzes the results of two kinds of turbulence models.
     本文采用三维定常Navier-Stokes方程组和k-ε紊流模型及kechen紊流模型,对非单向流洁净室的气流组织进行了数值模拟,并对两种紊流模型的数值计算结果做了分析与比较。
短句来源
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  “turbulence models”译为未确定词的双语例句
     The low mach number turbulent flow past two kinds of airfoils, a airfoil and GAW 1 airfoil, at the attack angle of near stall condition is numerically simulated with SIMPLE algorithm and three turbulence models including the standard K ε two equation turbulence model (SKE), a nonlinear K ε two equation turbulence model (NKE), and a modified K ε two equation turbulence model (MKE).
     采用求解低速流动的SIMPLE算法,用标准K-ε两方程模型、非线性K-ε两方程模型和一种改进的K-ε两方程模型来对绕两种翼型(A翼型和GAW-1翼型)在接近失速攻角情况下的低速湍流流动进行了数值模拟。
短句来源
     The turbulence models employed are the standard k-ε model. (the k-ε-E model) and the recently proposed model: the k-ε-S model. The computations are made for two different step ratios, (Y_o/H)=2, 3, and the results are compared with the k-ε-A and k-ε-R models, as well as the experimental data.
     分别采用k-ε-E模型和新近提出的k-ε-S模型,对放大比(Y_0/H)=2和3的单边放大流动进行了计算,并与前人用k-ε-R和k-ε-A模型的计算结果及试验资料进行对比。
短句来源
     Based on experimental data, a detailed discussion on the accuracy of 4 turbulence models with default model parameters in CFX4 is carried out.
     通过数值计算和实验的对比分析,对CFX4提供的常用的标准k-ε模型、RNGk-ε模型以及低雷诺数k-ε模型在模型参数缺省的情况下计算值的准确性作了较为详细的评价.
短句来源
     This thesis introduces the basic theory of natural wind and wind pressure distribution, and the theory of turbulence models.
     论文阐述了自然风及风压分布的基本理论,紊流模式理论;
短句来源
     The capabilities of different turbulence models are compared through simulating the flow field over airfoils.
     本文主要选取和求解了S-A、κ-ω、SST三种模型,并就三种模型在翼型流场中的模拟能力进行了对比研究。
短句来源
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  turbulence models
In the present work results are given of calculations with two-parameter turbulence models proposed in [12, 13] for describing complex flows.
      
The principal characteristics of the flow obtained on the basis of the turbulence models selected are compared for a free-stream Reynolds number Re∞ = 107.
      
Comparative analysis of turbulence models for calculating a near-wall boundary layer
      
The integral relations, the algebraic model, and the family of differential turbulence models widely used in theoretical and practical boundary layers studies are considered.
      
The differential turbulence models are analyzed for fully developed incompressible-fluid flow in three regions: the viscous sublayer, the logarithmic layer, and the flow core.
      
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The paper briefly reviews the historical development of shock-boundary layer interactions;their classifications and practical applications,the research topics and obtained results.Then emphasis is put on the numerical solution of Navier-Stokes equations in following aspects.,the complete set of Reynolds averaged Navier-Stokes equations; description of two representative schems of finite difference methods; treatment of shock waves and boundary conditions; mesh systems and turbulence models.

本文概述了激波与附面层干扰问题的历史发展;介绍了它的分类与现实意义、需要研究的内容与已经取得的成果;在指出了解析解法存在的问题后,特别对70年代以来用Navier-Stokes方程数值解本问题作了重点说明,包括数值计算中的几个关键问题,以及未来改进的途径。

By using a two-equation turbulence model (k-kl model), and the mixing-length model as well, a numerical analysis of turbulent mixing in the initial section of coaxial jets is presented. The finite-difference method developed by S.V.Patankar and D.B. Spalding for solving the two-dimensional parabolic equations had been inproved in some aspects and then adopted in this paper. The computations of both turbulence models are compared with F. H. Champagne and I. J. Wygnanski's experimental results.

本文分别应用混合长度模型和两个方程的湍流模型(k-kl模型),对初始截而参数任意分布的不可压缩轴对称同轴射流初始段的湍流混合过程进行了数值分析。数值计算基本上采用S.V.Patankar和D.B.Spalding提出的有限差分方法,但对这个方法作了某些改进。用两种模型得到的计算结果与F.H.Champagne和I.J.Wygnanski的实验结果比较,表明用两种模型算出的平均速度分布均与实验结果符合得较好,但用k-kl模型可得到更合理的浓度分布和与实验结果大体符合的湍能分布。此外,本文的计算表明,应用两个方程的湍流模型并不显著增加计算的复杂性。

This paper presents a numerical technique for calculating the steady turbulent flow of a incompressible fluid around the stern of body of revolution and its wake by using a streamline iteration method. The turbulence model used is a two-equation (K-ε) model devoloped by Harlow and Nakayama. In this numerical calculation, however, there are some features:1) The convection terms of governing equations for total pressure, turbulent kinetic energy and its dissipation rate in turbulent flow are written...

This paper presents a numerical technique for calculating the steady turbulent flow of a incompressible fluid around the stern of body of revolution and its wake by using a streamline iteration method. The turbulence model used is a two-equation (K-ε) model devoloped by Harlow and Nakayama. In this numerical calculation, however, there are some features:1) The convection terms of governing equations for total pressure, turbulent kinetic energy and its dissipation rate in turbulent flow are written in the form of the variations of tlvese variables along streamlines, and for static pressure the radial pressure gradient equation is used. In this form, these equations can be more eonvienicntly be dealt with in numerical calculation. 2) By means of a system of coordinate transformations, the external flow field extending to infinity in both radial and axial directions is transformed into an internal flow field within a finite region. Therefore, free-stream condition and parabolic flow condition may be used on the outer boundary and downstream boundary repectively. The boundary layer flow and potential flow outside can be resolved by an uniform system. 3) Assumptions for a thin boundary layer and partially parabolic flow, etc. are not needed.A numerical example is gaven to show the fair agreement between the theoretical predition by the present method and experimental results.

本文提出一种利用流线迭代法计算回转体尾部和尾流的定常、不可压缩湍流流动的数值方法。采用Harlow-Nakayama提出的两方程(K-ε)湍流模型。在数值计算上.1)把湍流流动中的总压,湍动能和它的耗散率方程中的对流项写成这些量沿流线变化的形式,静压采用径向压力梯度方程。2)用坐标变换,把径向和轴向都延伸至无穷远的流动区域变换到有限区域内,在外边界可使用自由来流条件,边界层流动和层外的势流流动可用统一的方程组求解。3)没有部分抛物型和薄边界层等种种近似假定。计算实例表明,理论预测和试验结果吻合。

 
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