摘要
对空间发展的气固两相圆湍射流进行了双向耦合的大涡模拟,系统地给出了不同颗粒尺寸和不同气载比时颗粒相对气相圆湍射流的调制规律。结果表明:在下游区域,所有尺寸的颗粒均使气相湍流削弱,而在上游区域,颗粒对气相的调制存在临界尺寸。该临界尺寸随颗粒材料密度的增加而减少,而气载比的增加会加剧颗粒对气相的调制程度。
Two-way coupled large eddy simulations of a spatially developing gas-particle round jet were used to study the turbulence modulation due to the particles and for a variety of particle sizes and mass loadings ratio. In the downstream region, the gas turbulence is always reduced by the particles. In the upstream region, there is a critical particle size for turbulence modulation, with the gas turbulence enhanced by larger particles and reduce by small particles. The critical size decreases as the particle density increases. The degree of modulation increases as the mass loading ratio increases.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第2期260-263,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(50576046)
关键词
气固两相圆湍射流
大涡模拟
双向耦合
湍流调制
gas-particle turbulent round jets
large eddy simulation two-way coupling
turbulence modulation
