2020级硕士生黄可欣撰写的有关旋转叶轮在T型通道中的混合特性的动态模态分解文章被国际权威期刊Physics of Fluids 录用。这是黄可欣同学发表的第二篇国际期刊英文文章。从投稿到录用供3个月时间。

论文题目"Dynamic mode decomposition of mixing characteristics in the T-junction with a rotation impeller," 

作者：Kexin Huang (黄可欣), Tong Li (李彤), Bo Su (苏博), Mei Lin (林梅),a) and Qiuwang Wang (王秋旺)

摘要：

ABSTRACT

Coherent structures of the turbulent mixing between cold and hot waters in a T-junction with a rotation impeller with varying blade numbers (N_p = 2–4) are studied using the dynamic mode decomposition (DMD) method. Velocity and temperature fields are obtained using large eddy simulation at the deflecting flow pattern (M_R = 0.49). Relevant dynamic features of a flow with low frequency mainly appear near the impeller and that with high frequency appear at the upper and bottom walls. The maximum velocity fluctuation increases with the blade number. Vortex shedding occurs at the blade tips. Spatial structures of the temperature field are mainly distributed at the mixing interface of the two fluids and impeller region. At N_p = 2 and 3, energetic coherent structures appear at the bottom wall, while at N_p = 4, they appear at the upper and bottom walls. The maximum temperature fluctuation first increases and then decreases with increasing blade number. The frequencies of velocity and temperature modes comprise multiple blade passing frequency (BPF) and rotation frequency, and the effect of rotation frequency on the velocity and temperature modes disappears with increasing blade number. Furthermore, the frequency of the temperature mode is higher than that of velocity at N_p ≤ 3 except for the identical BPF; N_p = 4, the two frequencies tend to be more synchronous.

论文连接网址： https://doi.org/10.1063/5.0100687

DOI: 10.1063/5.0100687