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。模拟仿真三种不同通风方式下狭长空间内车辆备车时气体环境变化,综合分析复杂通风方式所产生的独特气流组织,以及对基础通风方式排烟效果的影响。分析仿真结果发现:仅采取纵向通风时,污染物浓度的峰值较低,且首部区域的污染物浓度相对于横向通风和排风型半横向通风更低;在纵向通风的基础上实现的半横向通风和横向通风会产生复杂且不稳定的气流组织,带动车辆启动所产生的烟气向周围扩散,而单纯纵向通风时则可以抑制烟气的扩散。这些结果对了解复杂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.Simulate the change of gas environment in the long and narrow space during vehicle standby under three different ventilation modes,comprehensively analyze the unique air flow organization generated by the complex ventilation mode,and the impact on the smoke exhaust effect of the basic ventilation mode.The analysis and simulation results show that when only longitudinal ventilation is used,the peak concentration of pollutants is lower,and the pollutant concentration in the head area is lower compared to horizontal ventilation and exhaust type semi horizontal ventilation;On the basis of longitudinal ventilation,semi transverse ventilation and transverse ventilation can generate complex and unstable airflow organization,driving the smoke generated by vehicle startup to diffuse towards the surrounding area.However,simple longitudinal ventilation can suppress the diffusion of smoke.These results are of great significance for understanding the airflow organization patterns of complex ventilation methods and optimizing ventilation design schemes in narrow and long spaces.
作者
魏帅举
孙轶凡
崔永龙
李奇
缪越
WEI Shuai-ju;SUN Yi-fan;CUI Yong-long;LI Qi;MIAO Yue(China Shipbuilding and Marine Engineering Design and Research Institute,Shanghai 200011,China)
出处
《价值工程》
2023年第29期144-148,共5页
Value Engineering
关键词
狭长空间
纵向通风
横向通风
车辆
narrow and long space
longitudinal ventilation
horizontal ventilation
vehicle
