摘要
发展了一种基于双向耦合的直接数值模拟方法,研究了两相湍流射流中离散颗粒对气相射流的影响。流场采用高分辨率的算法直接耦合求解,颗粒相采用拉格朗日方法跟踪。结果表明不同Stokes数的颗粒对射流的影响不同。所有的颗粒都降低了射流速度半宽,但对流向平均速度剖面的影响比较复杂.Stokes数为0.01和50的颗粒降低了横向平均速度,使得湍流强度剖面变的更宽更低;而Stokes数为1的颗粒则增加了横向平均速度,降低了湍流强度。
A direct numerical simulation (DNS) technique based on two-way coupling was developed to study the influences on gas-phase jet by dispersed particles in a two-phase turbulent jet. The coupled high-resolution solver was directly performed for the flow-field and the Lagrangian method was used to trace particles. The results show that particles at different Stokes numbers have different influences on the jet. All particles reduce the jet velocity half-width, but the effects on the streamwise mean velocity profiles are complicated. The particles at Stokes number of 0.01 and 50 decrease the lateral mean velocity, and make the turbulence intensity profiles wider and lower, while the particles at Stokes number of 1 enhance the lateral mean velocity, and decrease the turbulence intensities.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第4期617-620,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点资助项目(No.50236030)国家重点基础研究发展计划项目(No.2003CB214500)
