负压车厢内均匀定向流场的三维仿真

为了有效防止车厢内有害气体在隔离、运送途中外泄污染周围环境并改善车厢内环境,利用CFD数值模拟方法对某负压车厢内的气流的运动状态、压力分布和温度分布进行三维仿真,比较分析三种不同送风参数的方案下车厢内的流场,选出在满足负压、温度及风量要求的条件下形成均匀定向气流流场最优方案,获得最佳动态送风控制规律,为提高负压车厢的安全性和舒适性提供理论依据,同时可为负压车厢内气流组织的试验研究和进一步优化设计提供了可行的方案.

Simulation of Directional Uniform Airflow in a Negative-Pressure Compartment

In order to avoid harmful gases exhausting to atmosphere and optimize the inner environment during gas transport and isolation efficiently,the distribution of airflow,pressure and temperature in a negative-pressure compartment were numerically simulated by the 3D CFD methods.These distributions based on three different projects of inlet parameters were analyzed and compared,the optimal project which formed the directional uniform airflow in it on the conditions of suitable negative-pressure,temperature and air flux was found.It is a reference for improving the security and the comfort of a negativepressure compartment,and it is also helpful for the experiment investigation and the optimization design of the air distribution in the negative-pressure compartment.