逆流式喷雾场中气液两相流温度测量装置

针对逆流式气液喷雾场的特点,设计了可以同时测量气液喷雾场两相温度的热电偶测温装置。通过光脉动颗粒测试仪,对有无真空泵抽气作用的2种气液分离效果进行了对比验证。在对光强信号波形图信号分析后,实验结果表明:装置增加滤网后能够有效地阻止液滴进入,选择合适的滤网配合真空泵等速抽气测量,可以达到很好的气液分离效果,内部保持无粒子波动信号,从而测出气相温度,而防护罩上方的热电偶可以直接测量液相温度。

Device for temperature measurement in counter-current gas-liquid spraying field

A new thermocouple temperature measurement instrument for counter-current gas-liquid spraying field was designed.The gas and liquid phase temperature could be measured simultaneously with this device.With the on-line monitoring particle measurement equipment based on the principle of light fluctuation,the separation effectiveness of gaseous phase from the mixed two-phase flow was evaluated at two different situations of vacuum pump and no vacuum pump.By analyzing the diagrams of received light intensity,the results show that copper mesh at the bottom of the instrument can prevent liquid droplets from getting into the shield effectively.If adopting copper mesh with proper mesh size and vacuum pump,there is no signal of particle light fluctuation inside the shield,which means the separation effectiveness of gas-liquid phases is satisfied.So the gaseous phase temperature can be measured accurately and the liquid phase temperature also can be obtained directly with the thermocouple on the top of the shield.