• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Turbulent mixing in non-isothermal jet in crossflow
【24h】

Turbulent mixing in non-isothermal jet in crossflow

机译：非等温射流紊流混合

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

Large eddy simulation (LES) of turbulent mixing in a non-isothermal jet in crossflow (JICF) configuration is conducted with a hybrid Eulerian-Lagrangian mathematical/computational methodology. In this methodology, a high-order finite difference (FD) multi-block method is used to solve the Eulerian filtered Navier-Stokes equations in a generalized coordinate system. The composition field is described by the filtered mass density function (FMDF) and its equivalent stochastic Lagrangian equations, which are solved by a Lagrangian Monte Carlo (MC) method. The consistency of the Eulerian and Lagrangian parts of LES/FMDF is established for isothermal and non-isothermal JICFs. It is demonstrated that the instantaneous and averaged scalar concentration and temperature fields as obtained from LES-FD and FMDF-MC data are very similar. The LES/FMDF results are also in good agreement with the available experimental data, indicating the accuracy and reliability of LES/FMDF model. The numerical results show that the variation in temperature has a significant effect on the flow and mixing in JICF. By decreasing the jet to crossflow temperature ratio for fixed jet and crossflow velocities, the jet penetration, the spreading rate, the entrainment and the mixing are considerably improved.
机译：使用欧拉-拉格朗日混合数学/计算方法对非等温射流横流（JICF）配置中的湍流混合进行大涡模拟（LES）。在这种方法中，使用高阶有限差分（FD）多块方法来求解广义坐标系中的欧拉滤波Navier-Stokes方程。组成域由滤波的质量密度函数（FMDF）及其等效的随机拉格朗日方程式描述，这些方程式可通过拉格朗日蒙特卡洛（MC）方法求解。建立了等温和非等温JICF的LES / FMDF欧拉和拉格朗日部分的一致性。结果表明，从LES-FD和FMDF-MC数据获得的瞬时和平均标量浓度和温度场非常相似。 LES / FMDF模型的结果也与现有的实验数据非常吻合，表明LES / FMDF模型的准确性和可靠性。数值结果表明，温度的变化对JICF的流动和混合有显着影响。对于固定的射流和横流速度，通过降低射流与横流的温度比，可以显着改善射流的穿透力，扩散速度，夹带和混合。

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