摘要
采用RNG-κε湍流模型,应用流体有限元方法,对错流紊动射流的流动速度场进行了数值模拟研究。结果表明,错流射流内部有分叉现象,射流喷口背风侧的流动出现了分离并形成尾迹区。分析了分叉及尾迹区产生的机理。给出了射流与主流速度比等于3和5的速度场。研究结果表明:射流与主气流速度比直接影响流场特性,其值越大射流对主气流的影响越大。
By using RNG k-ε turbulent model numerical simulation for the cross-flow turbulent and fluid finite element methods, this paper performed the jet. There is a bifurcation in the jet, and the separation events and the wake in the lee of the jet exit are found, and the forming mechanism is also analyzed. The paper has given the velocity field which the jet flow and main flow＇s velocity ratios is 3 and 5. The larger jet cross-flow velocity ratio can change the flow characteristics more obviously.
出处
《排灌机械》
2005年第6期38-41,共4页
Drainage and Irrigation Machinery
关键词
错流射流
湍流模型
数值模拟
尾迹
cross-flow jet
turbulent model
numerical simulation, wake
