Influence Study On Effect Of Longitudinal Ventilation In Confined Space Fire Sprinkler System

With the acceleration of the national economic construction,the construction of the confined space is increasing,such as:tunnel,underground engineering,and so on,so it is very important to carry out fire prevention and fire fighting in confined space.This type of fire in confined space is different from other buildings in the limited space,there are a large number of moving objects,and the two sides no wind,only the wind and the two ends,which have limited space air fire prevention and extinguishment ushered in new challenges,especially for the sprinkler has put forward higher requirements.The influence of longitudinal wind on the fire and the fire suppression effect of the sprinkler system in the confined space are related to people's life safety and property safety.This paper through the system effect on the confined space with longitudinal wind spraying experiments were carried out to study the fire,the main content of the sprinkler system in fire extinguishing effect analysis of different wind speed compared with the spray pressure difference;this study is divided into two,in two different fire power situation,by changing the wind speed observation know the sprinkler;respectively.The influence of longitudinal wind on the sprinkler fire power A condition;the effect of longitudinal wind on the sprinkler fire power B case;for the above,mainly through the measured near the scene of each point temperature(T),carbon monoxide(CO)concentration changes of reaction time and extinguishing fire control time to determine the effect of sprinkler.The numerical simulation is based on the size of the experimental platform is set in the two conditions,the change of wind speed parameters,sprinkler system parameters remain unchanged,set up twelve thermocouples are arranged according to the original position of the original experimental simulation,temperature changes in the limited space through the observation section,smoke spread etc..Through the comparison of experiment and simulation,experiment and simulation can be found to have high similarity,spray extinguishing time is very close,the confined space distribution of temperature error difference,the best wind speed range are basically the same.Through the test and simulation,it can be concluded that the longitudinal wind speed is in a certain range,which is helpful to the fire suppression.Therefore,in the field of fire control,we must pay attention to the longitudinal velocity,which is related to the rescuer and rescued the life safety,the relationship between the severity of the loss of property,it has practical significance for the protection of the safety and reduce economic losses.