...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aerospace science and technology >Gas kinetic scheme for turbulence simulation
【24h】

Gas kinetic scheme for turbulence simulation

机译：湍流模拟的气体动力学方案

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The extended gas-kinetic scheme (GKS) for turbulence simulations is developed based on the generalized BGK equation with the effective relaxation time. This relaxation time can be computed from the turbulent viscosity, through which turbulence models can be directly combined. For engineering low-cost simulations of high Reynolds number flows, common-used RANS models are applied, while the LES and hybrid RANS/LES (DES and IDDES) models as well as the minimized dispersion and controllable dissipation (MDCD) reconstruction are adopted in high fidelity turbulence simulations. In addition, the turbulent transport equations are solved in a strongly coupled way by using GKS with scalar transport. The extended GKS is applied in typical turbulent flow predictions including the RANS simulation of hypersonic compression ramp flow and the detailed simulation of multiscale turbulent structures in low speed cylinder flow with hybrid models. The predicted results agree well with existing experimental measurements and numerical studies, which shows the good accuracy, resolution and robustness of the extended GKS and reveals the wide prospects in turbulence simulations on different model scales, including the multiscale models such as hybrid RANS/LES methods. Furthermore, the multiscale turbulence simulation methods are worthy of further studies based on the generalized BGK model. (C) 2018 Elsevier Masson SAS. All rights reserved.
机译：基于具有有效弛豫时间的广义BGK方程，开发了用于湍流模拟的扩展气体动力学方案（GKS）。弛豫时间可以从湍流粘度计算得出，通过湍流模型可以直接组合湍流模型。对于高雷诺数流的工程低成本仿真，使用了常用的RANS模型，而LES和混合RANS / LES（DES和IDDES）模型以及最小化的色散和可控耗散（MDCD）重建被采用。高保真湍流模拟。另外，通过使用带有标量输运的GKS以强耦合方式求解湍流输运方程。扩展的GKS应用于典型的湍流预测中，包括高超声速压缩坡道流的RANS模拟以及使用混合模型的低速气缸流中多尺度湍流结构的详细模拟。预测结果与现有的实验测量和数值研究非常吻合，显示了扩展GKS的良好准确性，分辨率和鲁棒性，并揭示了在不同模型尺度上进行湍流模拟的广阔前景，包括诸如RANS / LES混合方法等多尺度模型。此外，基于广义BGK模型的多尺度湍流模拟方法值得进一步研究。 （C）2018 Elsevier Masson SAS。版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号