南京航空航天大学学报（英文版）2024，Vol.41Issue(3)：311-324,14.DOI:10.16356/j.1005-1120.2024.03.005
气固两相湍流非定常压力脉动特性数值模拟研究
Numerical Investigation on Unsteady Pressure Oscillation of Gas-Solid Two-Phase Turbulent Flow
摘要
Abstract
Relevant to thermoacoustic combustion instability in engines,the pressure oscillations in gas-solid two-phase turbulent flow have long been a topic of great concerns.To understand the pressure oscillation characteristics in gas-solid two-phase flow,three-dimensional unsteady numerical calculations are conducted for typical two-phase gas-solid backstep flow using the combined self-adaptive turbulence eddy simulation(SATES)and discrete phase model(DPM)method.The accuracy and reliability of the numerical method is firstly validated by comparisons with the experimental data.Then,the unsteady pressure signal of the two-phase gas-solid flow is compared with that of the pure gas phase flow,and it is found that with the addition of solid particles,the dominant frequency of pressure oscillation is slightly changed,and the oscillation amplitude significantly decreases.Finally,the effects of diameter and mass fraction of solid particles on the pressure oscillation are investigated.It is found that with increasing the solid particle diameter,the amplitude of pressure oscillation firstly decreases and then increases,and the amplitude exhibits the smallest with the diameter of 10 μm;with increasing the mass fraction of solid particle,the pressure oscillation amplitude shows a decreasing trend.The results demonstrate that the properties of solid particles in two-phase flow have a small impact on the dominant frequency of pressure oscillation,while a significant impact on the oscillation amplitude.关键词
压力脉动/后台阶气固两相流/自适应湍流模拟/离散相模型/频谱特性Key words
pressure oscillation/gas-solid two-phase backstep turbulent flow/self-adaptive turbulence eddy simulation(SATES)/discrete phase model(DPM)/frequency-spectra characteristics分类
航空航天引用本文复制引用
阳勇,臧雯雯,韩省思,毛军逵..气固两相湍流非定常压力脉动特性数值模拟研究[J].南京航空航天大学学报（英文版）,2024,41(3):311-324,14.基金项目
This work was supported in part by the National Natural Science Foundation of China(Nos.52376114,92041001),the Natural Science Founda-tion of Jiangsu Province(No.BK20200069),and the National Science and Technology Major Projects(Nos.J2019-Ⅲ-0015-0059,2017-Ⅲ-0005-0029). （Nos.52376114,92041001）
