救生舱内气流组织改进及温度均匀性的数值模拟

Improvement of airflow organization in refuge chamber and numerical simulation of temperature distribution uniformity

为获得更加合理的舱内气流组织方式,营造更好的舱内生存环境,以某公司生产的救生舱样舱为研究对象,采用CFD数值计算技术,对舱内热湿环境进行了数值模拟,发现样舱在气流组织上存在不足.为克服这些不足,提出5种气流组织改进方案,对各种方案进行模拟分析,并以温度不均匀系数作为评价指标,对各方案的舱内温度分布均匀性进行比较,通过比较得出方案三为最佳的气流组织方案.研究发现,送风口位置与送风方向对舱内热湿环境营造有较大的影响,适当提高送风温度,有利于提高舱内温度均匀性和减少冷量消耗.

To achieve a more suitable airflow organization and to create a more comfortable indoor climate of refuge chamber, the thermal and moisture environment parameters in a refuge chamber developed by one manufacturer was numerically simulated by using a commercial computational fluid dynamics CFD software, Fluent, and some shortcomings on airflow organization were found. To overcome the shortcomings, five improved airflow organization modes were proposed and simulated by CFD software. An index, temperature non - uniformity coefficient, was used as an assessment criterion to compare the uniformity of temperature in refuge chamber. An optimal airflow organization mode was obtained according to the uniformity of air temperature distribution in refuge chamber. It is found that the site of supply - air outlet and the direction of supply air have important effects on the thermal and moisture environment in refuge chamber. It is useful for the improvement of air temperature uniformity in refuge chamber and for the reduction of cooling energy consumption to increase the supply air temperature reasonably.