Large-eddy simulation of turbulent flow over the DrivAer fastback vehicle model

Rüttgers, Mario; Park, Junshin; You, Donghyun

doi:10.1016/j.jweia.2019.01.003

Cited by 29 publications

(21 citation statements)

References 20 publications

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“…In this section the results of the ILES for the following geometries are presented: (i) a simplified DrivAer fastback model to asses the influence of the Reynolds number and the absence of the wheels on the aerodynamic performance; (ii) the DrivAer fastback model to assess the capability of the proposed solver to deliver an accurate solution with a moderate number of DoFs. The accuracy of the results are assessed comparing the pressure and aerodynamic coefficients and the flow fields with experimental data [11] and reference CFD solutions [6,11,13,41]. The pressure coefficient is defined as…”

Section: Resultsmentioning

confidence: 99%

“…WM-LES proved to be able to predict unsteady flow features, but a detailed analyses on the vortical structures around the car is not provided. Recently, Rüttgers et al [13] adopted a LES (Large Eddy Simulation) approach to predict the turbulent flow around the fastback geometry, providing a detailed and systematic analysis of the unsteady flow features.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of a Discontinuous Galerkin Method for the Simulation of the Turbulent Flow around the DrivAer Car Model

et al. 2021

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The turbulent flow over the DrivAer fastback model is here investigated with an order-adaptive discontinuous Galerkin (DG) method. The growing need of high-fidelity flow simulations for the accurate determination of problems, e.g., vehicle aerodynamics, promoted research on models and methods to improve the computational efficiency and to bring the practice of Scale Resolving Simulations (SRS), like the large-eddy simulation (LES), to an industrial level. An appealing choice for SRS is the Implicit LES (ILES) via a high-order DG method, where the favourable numerical dissipation of the space discretization scheme plays directly the role of a subgrid-scale model. Implicit time integration and the p-adaptive algorithm reduce the computational cost allowing a high-fidelity description of the physical phenomenon with very coarse mesh and moderate number of degrees of freedom. Two different models have been considered: (i) a simplified DrivAer fastback model, without the rear-view mirrors and the wheels, and a smooth underbody; (ii) the DrivAer fastback model, without rear-view mirrors and a smooth underbody. The predicted results have been compared with experimental data and CFD reference results, showing a good agreement.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of a Discontinuous Galerkin Method for the Simulation of the Turbulent Flow around the DrivAer Car Model

et al. 2021

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“…x , y and z coordinate, p denotes the pressure after filtering processing, ij  denotes the sub-grid scale stress, which is calculated by [25]…”

Section: The Momentum Conservation Equation Of Large Eddy Simulation mentioning

confidence: 99%

Heat Transfer Analysis in Cavity of Scroll Compressor Under Clearance Leakage Flow Based on Symlet Wavelet Finite Element Method

Zhao

Song

Gao

et al. 2020

Preprint

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In order to improve the computational precision and efficiency of heat transfer of cavity medium of scroll compressor, the Symlet wavelet 10 finite element model is constructed by using the Symlet wavelet 10 function as interpolation function. The heat transfer model of cavity medium of scroll compressor under leakage flow is constructed based on large eddy simulation technology. Heat transfer analysis of cavity medium of scroll compressor is analyzed based on theoretical and experimental analysis. Results show that the Symlet wavelet 10 finite element model has higher precision and higher efficiency than the other two simulations. In addition, the influences of axis meshing clearance and radial meshing clearance on temperature of cavity medium of scroll compressor are discussed, the temperature of cavity medium of scroll compressor increases with axis meshing clearance and radial meshing clearance. The theoretical results can provide the favorable guidance for optimal design and operation of scroll compressor.

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“…Borkowski et al [15] used CFD software Fluent to simulate the mechanical power losses in the hydro-set gap for the hydro-set that consists of the guide vanes and propeller turbine integrated with the permanent magnet synchronous generator. Rüttgers et al [16] used CFD technology to analyze the flow field over the DrivAer fastback vehicle model for capturing flow separation, vortical structures, and unsteady quantities. Dang et al [17] investigated the turbulent flow and heat transfer characteristics of the rotor-stator system of a hydro-generator scale model by CFD technology with the conjugate heat transfer model.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on Flow Field and Design Optimization of a Generator Unit Based on Computational Fluid Dynamics Analysis

Tan

Yuan

et al. 2021

Mathematical Problems in Engineering

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Achieving an optimal cooling of the generator unit is indispensable for high working performance. In this work, computational fluid dynamics analysis on the flow field of the conventional type and silent type of the S688CCS series generator unit is conducted, and design optimization of the generator unit with poor cooling is studied based on flow field analysis results. Flow field simulation results indicate that the total cooling air quantity of the silent type generator unit is lower than that of the conventional type generator unit, and the cooling air quantity of the radiator is also lower than that of the conventional type generator unit, which is not conductive for the cooling of the silent type generator unit. The flow field optimization is achieved by adopting the single variable control method to improve the structure of the fan cover, silent components for silence, adjacent structure, and air inlet grille. The corresponding structure optimization scheme is put forward. After optimization, the air quantity for the cooling radiator of the silent type generator unit is 44.33% higher than that of its original structure, and the total cooling air quantity is higher than that of the conventional type generator unit. The research results in this work can provide a theoretical basis for the design of the cooling air flow path of generator units for achieving an optimal cooling performance.

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Large-eddy simulation of turbulent flow over the DrivAer fastback vehicle model

Cited by 29 publications

References 20 publications

Assessment of a Discontinuous Galerkin Method for the Simulation of the Turbulent Flow around the DrivAer Car Model

Assessment of a Discontinuous Galerkin Method for the Simulation of the Turbulent Flow around the DrivAer Car Model

Heat Transfer Analysis in Cavity of Scroll Compressor Under Clearance Leakage Flow Based on Symlet Wavelet Finite Element Method

Numerical Simulation on Flow Field and Design Optimization of a Generator Unit Based on Computational Fluid Dynamics Analysis

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