摘要
对充气过程中的温度变化规律进行研究,为得到温升控制方法提供理论依据。通过应用STAR-CCM+软件进行数值仿真,研究高压气瓶在快速充装的过程中的温升效应。建立仿真模型,设置条件,模拟充气时间分别为5、30、50s和充气结束(80s)时仿真模型的温度场分布,并与热电偶测得的试验结果进行比较,最大温差为4℃。考虑真实气体的影响,得到不同时间段气瓶内局部温度分布规律,保障充气安全。结果表明:仿真结果与试验结果基本相吻合;最低温度位于充气进气口,进气口处存在较大的温度梯度;局部温度场分布呈现羽流状。
The law of temperature change in the fast filling process should be studied to provide theoretical basis for getting the control method of temperature rise. The numerical simula- tion was carried out by using STAR--CCM＋ software and the temperature rise of firefighter respirator cylinder in the fast fill-ing process was researched. The simulation model was estab- lished and the simulation condition was set to simulate the tem- perature distribution at 5 s, 30 s, 50 s and the end of filling （80 s）. The simulation results, compared with the experiments re- sults of thermocouple, revealed that the temperature difference was smaller than 4 ℃. Considering the influence of real gas, the local temperature distribution law in cylinder in different time was obtained, to ensure the safety of gas filling. The re- suits of the study showed that the simulation results were con- sistent with the experiment results; the gas inlet had the lowest temperature and there were significant temperature gradient a- round the gas inlet; the local temperature distribution had the shape of plume.
出处
《消防科学与技术》
CAS
北大核心
2015年第3期307-311,共5页
Fire Science and Technology
