Studies of flight-velocity effects on near-field and intermittent properties of a subsonic jet

Studies of flight-velocity effects on near-field and intermittent properties of a subsonic jet
复制标题

飞行速度对亚音速喷气机近场和间歇特性的影响研究

DOI:
10.1016/j.compfluid.2019.104351
复制
发表时间:
2020-01
期刊:
影响因子:
2.8
通讯作者:
Fu Song
Fu Song
中科院分区:
工程技术3区
文献类型:
--
作者:
Zhu Wenqing;Xiao Zhixiang;Fu Song

文献摘要

参考文献

相似文献

采用改进的延迟分离涡模拟方法(IDDES),通过对网格尺度的修正,对冷喷流的飞行速度效应进行了数值模拟,主要研究了近场流动和喷流中心线区域的不稳定性。首先,使用三个网格和可用的测量数据对IDDES中的修改进行验证。该方法可以有效地降低模型的涡粘性,提高原IDDES的性能。然后,飞行速度对平均流,湍流,和不稳定性的影响进行了研究。结果表明,势核端部附近的脉动不稳定性是湍流剪切层结构侵入射流核的结果。随着飞行速度的增加,射流中心区域的不稳定性因子减小,峰值向下游移动。偏度和峰度因子以类似的方式执行。
The flight velocity effect on a cold jet flow is numerically predicted by the improved delayed detached eddy simulation (IDDES) with a modification to the grid length scale, mainly focusing on the near-field flows and intermittency properties in the jet centerline region. First, the modification in IDDES is validated using three meshes and available measurements. This method can reduce the modeled eddy viscosity effectively and improve the performance of original IDDES. Then, the flight velocity effects on the mean flow, turbulence, and intermittency are studied. From the results, the fluctuation intermittency near the end of potential core is caused by the intrusion of turbulent shear-layer structures into the jet core. When the flight velocity increases, the intermittency factor in the jet centerline region is reduced, and its peak moves downstream. The skewness and kurtosis factors perform in a similar manner.
DOI: 10.1016/j.ijheatfluidflow.2017.10.008
发表时间: 2017-12
影响因子: 2.6
作者:
R. Camussi;M. Mancinelli;A. Marco
通讯作者: R. Camussi;M. Mancinelli;A. Marco
DOI: 10.1177/1475472x17709926
发表时间: 2017-04
影响因子: 1
作者:
S. Unnikrishnan;D. Gaitonde;L. Agostini
通讯作者: S. Unnikrishnan;D. Gaitonde;L. Agostini
DDES 具有针对经过风力涡轮机翼型的失速流的自适应系数
DOI: 10.1016/j.energy.2018.07.176
发表时间: 2018-10
期刊: Energy
影响因子: 9
作者:
Jian Liu;Wenqing Zhu;Zhixiang Xiao;Haisheng Sun;Yong Huang;Zhitao Liu
通讯作者: Zhitao Liu
DOI: 10.1016/j.ijheatfluidflow.2012.01.006
发表时间: 2012-06
期刊: Proceeding of Seventh International Symposium on Turbulence and Shear Flow Phenomena
影响因子: --
作者:
R. Sandberg;N. Sandham;V. Suponitsky
通讯作者: R. Sandberg;N. Sandham;V. Suponitsky
高雷诺数下 NACA0015 机翼近失速的低频振荡
DOI: 10.2514/1.j058598
发表时间: 2020
期刊: AIAA Journal
影响因子: 2.5
作者:
Liu Jian;Xiao Zhixiang
通讯作者: Xiao Zhixiang