摘要
本文利用动网格技术对两维自耦合射流冲击冷却恒热流壁面进行了数值模拟,腔体底面具有一定的运动规律,每个时间步网格会重新划分。通过对流场和温度场的分析,得出以下结论:自耦合射流是零质量射流,射流的截面速度分布具有自相似性。涡对的平移和破碎影响了温度场的分布,从而冲击靶面温度最低点不是出现在射流驻点区,而是对应于涡对破碎、紊流度最大的位置。
Two-dimensional numerical simulation of impingement cooling on constant-heat-flux wall by synthetic jet was performed by using moving-grid technique. The bottom of the cavity has its moving law and the meshes are regenerated step by step. Through analyzing the flow and temperature fields, we can know that the synthetic jet is zero-mass-flow jet and its velocity in cross section is self-similar. The shifting and breaking of the vortex pairs affects the distribution of the temperature so that the lowest temperature appears at the place where vortex pairs break and turbulent density is the biggest but not at the region corresponding to the stagnation point.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第4期646-648,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50276028)
关键词
自耦合射流
冲击冷却
数值模拟
synthetic jet
impinging cooling
numerical simulation
