原子能科学技术2012，Vol.46Issue(6)：689-694,6.
入口速度比对同轴喷射流三维温度振荡影响的实验研究
Experimental Investigation on Effect of Inlet Velocity Ratios for 3-D Temperature Fluctuation Caused by Coaxial-Jet Flow
摘要
Abstract
An experiment was performed to study the effect of inlet velocity ratios for 3-D temperature fluctuation caused by coaxial-jet flows based on the 3-D temperature and 2-D velocity fields. The experiment results show that the mixing behavior is completed at the bottom of test section in R<l condition. The averaged temperatures at the bottom of the flow field are asymmetric in R<l condition, while those are symmetric in R≥ conditions. The transient temperatures are asymmetric in these cases. With the increment of inlet velocity ratios, the gradients of cold fluid temperatures decrease in height direction, while those of hot fluid temperatures increase. In r>1 condition, the intensities of temperature fluctuations are less than those in R ≤1 conditions. The strong temperature fluctuations occur in the regions between the hot and cold flow, as well as between the hot flow and environmental flow in this case. The frequencies of temperature fluctuations are less than 7 Hz.关键词
同轴喷射流/冷热流体搅混/温度振荡/速度比/实验研究Key words
coaxial-jet flow/mixing of hot and cold fluids/ temperature fluctuation/velocity ratios/ experimental investigation分类
能源科技引用本文复制引用
曹琼,陆道纲,张盼,施文博,田璐..入口速度比对同轴喷射流三维温度振荡影响的实验研究[J].原子能科学技术,2012,46(6):689-694,6.基金项目
中央高校基本科研业务费专项资金资助项目(11QX50) （11QX50）
