纵向通风方式下狭长空间内车辆启动气流组织特性研究  

Study on the Characteristics of Vehicle Starting Air Flow Organization in Narrow Space underLongitudinal Ventilation

作　　者：李奇 崔永龙 魏帅举 李坤[1] LI Qi;CUI Yong-long;WEI Shuai-ju;LI Kun(China Shipbuilding and Marine Engineering Design and Research Institute,Shanghai 200011,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011

出　　处：《价值工程》2023年第27期143-147,共5页Value Engineering

摘　　要：狭长空间内车辆启动易产生污染气体环境的有害烟气,通过合理有效的通风方式抑制其扩散并及时排出至关重要。模拟仿真了三种不同纵向通风方式下狭长空间内车辆备车时气体环境变化,分析此类通风方式下狭长空间内气流组织和污染物浓度分布规律。分析仿真结果发现:在纵向通风送风气流的影响下,狭长空间内车辆启动时产生的烟气向首部区域方向流动,导致首部区域污染物浓度较高,且送风气流在尾部区域流向首部区域的过程中变得较为均匀,对于烟气射流的直接排除起到了导流作用,减少了烟气的扩散。通风口设置差异和自然补风差异,会影响部分烟气向左侧人员活动区或者车辆驾驶区扩散,三种通风方案相比之下方案2可以形成更加良好的气流组织形式。这些结果对了解纵向通风方式气流组织规律,优化狭长空间内通风设计方案具有重要意义。Vehicle startup in a long and narrow space is prone to produce harmful smoke that pollutes the gas environment.It is very important to restrain its diffusion and discharge it in time through reasonable and effective ventilation.The change of gas environment in the narrow and long space under three different longitudinal ventilation modes during vehicle standby was simulated,and the air distribution and pollutant concentration distribution in the narrow and long space under such ventilation modes were analyzed.Analysis and simulation results show that under the influence of longitudinal ventilation airflow,the smoke generated during vehicle startup in a narrow space flows towards the direction of the head area,resulting in a higher concentration of pollutants in the head area.Additionally,the airflow becomes more uniform during the flow from the tail area to the head area,which plays a guiding role in the direct elimination of smoke jets and reduces the diffusion of smoke.The differences in vent settings and natural air supply can affect the diffusion of some smoke towards the left personnel activity area or vehicle driving area.Compared to the three ventilation schemes,Scheme 2 can form a better airflow organization form.These results are of great significance for understanding the airflow organization rules of longitudinal ventilation methods and optimizing ventilation design schemes in narrow spaces.

关 键 词：狭长空间 纵向通风 气流组织 车辆 

分 类 号：TU834[建筑科学—供热、供燃气、通风及空调工程]