首页> 外文会议>Third Asia-Pacific International Symposium on Aerospace Technology >Numerical Prediction of Massive separation Unsteady Flows around Bluff-bodies
【24h】

Numerical Prediction of Massive separation Unsteady Flows around Bluff-bodies

机译:钝体周围非定常流动的数值预测

获取原文
获取原文并翻译 | 示例

摘要

The massive separated flows around bluff-bodies, such as Rudimentary landing gear (RLG), NACA-0021 at 60 degrees incidence and tandem cylinders (TC), are predicted using unsteady Reynolds averaged Navier-Stokes (URANS) and delayed-detached-eddy simulation (DDES) based on k-- SST model. Firstly, decay of isotropic turbulence (DIT) is used to validate our codes and redefine constant CDES in DDES method. Different schemes and dissipation are also investigated through DIT case. Effects of different spatial schemes on the averaged and instantaneous flow-fields are shown by comparing with the available measurements. From the comparisons on scheme, high-order and low-dissipation scheme is necessary to predict the small scale of structures. Furthermore, DDES is more reasonable turbulence modeling methods than URANS.
机译:使用不稳定的雷诺平均Navier-Stokes(URANS)和延迟分离涡流来预测钝体周围的大量分离流,例如起落架(RLG),入射角为60度的NACA-0021和串联汽缸(TC)。 k-SST模型的计算机模拟(DDES)。首先,利用各向同性湍流(DIT)的衰减来验证我们的代码并以DDES方法重新定义常数CDES。还通过DIT案例研究了不同的方案和功耗。通过与可用测量值进行比较,显示了不同空间方案对平均流场和瞬时流场的影响。从方案的比较来看,高阶和低耗散方案对于预测结构的小规模是必要的。此外,与URANS相比,DDES是更合理的湍流建模方法。

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