不同激励频率的脉冲微射流对圆射流流场扩散掺混的数值模拟和影响分析（英文）
发布时间：2018-10-10 18:57
【摘要】：采用Fluent商用计算软件,结合实验所得数据,在保持微射流与主射流的占空比A为10%和质量流率比C_m为0.05%不变的条件下,将侧向垂直分布的脉冲微射流的激励频率与主射流的大涡频率比值F_V/F_O在0~2范围内变化,对圆射流外部流场的扩散掺混进行了研究。结果表明:流场的流动状态对脉冲激励频率的变化十分敏感,在微射流激励频率F_V与主射流大涡频率F_O相同时,流场的掺混增强效果最明显,流向涡结构较为规则,且在向外扩散发展的过程中能够卷吸更多的流体进行掺混。
[Abstract]:The commercial calculation software Fluent is used, and the experimental data are combined. Under the condition that duty cycle A is 10% and mass flow ratio is 0.05%, the ratio of microjet to main jet is 0. 05%. The diffusion mixing of the external flow field of the circular jet was studied by changing the excitation frequency of the lateral vertical pulse micro-jet to the large eddy frequency ratio of the main jet F_V/F_O in the range of 0 ~ 2. The results show that the flow state of the flow field is very sensitive to the change of the pulse excitation frequency. When the micro-jet excitation frequency FV is the same as the main jet large eddy frequency, the mixing enhancement effect of the flow field is the most obvious, and the flow direction vortex structure is more regular. Moreover, more fluids can be absorbed and mixed in the process of outward diffusion and development.
【作者单位】： 重庆理工大学机械工程学院;汽车零部件先进制造技术教育部重点实验室;重庆机电职业技术学院;
【基金】：partly Sponsored by National Natural Science Foundation of China (No.51275550)
【分类号】：O358
本文编号：2262881
[Abstract]:The commercial calculation software Fluent is used, and the experimental data are combined. Under the condition that duty cycle A is 10% and mass flow ratio is 0.05%, the ratio of microjet to main jet is 0. 05%. The diffusion mixing of the external flow field of the circular jet was studied by changing the excitation frequency of the lateral vertical pulse micro-jet to the large eddy frequency ratio of the main jet F_V/F_O in the range of 0 ~ 2. The results show that the flow state of the flow field is very sensitive to the change of the pulse excitation frequency. When the micro-jet excitation frequency FV is the same as the main jet large eddy frequency, the mixing enhancement effect of the flow field is the most obvious, and the flow direction vortex structure is more regular. Moreover, more fluids can be absorbed and mixed in the process of outward diffusion and development.
【作者单位】： 重庆理工大学机械工程学院;汽车零部件先进制造技术教育部重点实验室;重庆机电职业技术学院;
【基金】：partly Sponsored by National Natural Science Foundation of China (No.51275550)
【分类号】：O358
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