摘要
当热射流垂直入射至主流中时 ,在宽广的射流与主流流速比 ( 0 0 1～ 1 50 )下 ,测量了 3个不同区域内近壁区流体的温度随流速比变化的情况 .通过实验发现 ,横向射流的流动形式复杂 ,不同区域近壁区流体的温度随流速比变化的情况不尽相同 .在射流下游区 ,当流速比大于 0 4 0以后 ,射流核心区已基本离开近壁处 .在射流管出口处 ,低流速比时射流出口温度分布极不均匀 .在射流管内 ,低流速比时存在有紊动区 ,当流速比大于 0 0 5以后 。
The near wall temperature distribution in three different areas were measured for a hot jet injected vertically down to the main flow. It is a function of the velocity ratio between the hot jet and the main flow. Flows with velocity ratio between 0.01 and 1.50 were measured. It was found that in the downstream of the hot jet when velocity ratio is larger than 0.40, the core of the hot jet is away from the wall. The temperature distribution at the inlet of the hot jet is quite uneven when velocity ratio is small and there is turbulent region inside the hot jet tube. But this effect of the main flow on the flow inside the hot jet tube disappears after the velocity ratio becomes larger than 0.05.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2001年第5期459-462,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目! (5 9995 46 0 - 3)
中国核动力研究设计院资助项目
关键词
横向射流
流速比
近壁区
温度变化
Temperature distribution
Temperature measurement
