CAJ | 학술논문

用因次分析法建立了临界风速与相关参数的关系式,导出了临界风速无因次准则的表达式.以狮子洋隧道为载体建立隧道模型,在坡度为0、不同火灾热释放速率、不同通风风速情况下进行数值模拟,获得不同火灾热释放速率时的临界风速.在此基础上,以不同火灾热释放速率对应的临界风速为条件进行数值模拟得到火源上方烟气的温度.将所得的数据代入关系式进行拟合,给出了一种新的临界风速计算公式.
용인차분석법건립료림계풍속여상관삼수적관계식,도출료림계풍속무인차준칙적표체식.이사자양수도위재체건립수도모형,재파도위0、불동화재열석방속솔、불동통풍풍속정황하진행수치모의,획득불동화재열석방속솔시적림계풍속.재차기출상,이불동화재열석방속솔대응적림계풍속위조건진행수치모의득도화원상방연기적온도.장소득적수거대입관계식진행의합,급출료일충신적림계풍속계산공식.
The dimensionless criteria expression of critical ventilation velocity was derived.Basd on Shiziyang tunnel,a new tunnel model was set up and was simulated under different ventilation velocities on the situation of 0 gradient,from which critical ventilation velocity of different fire heat release rates was obtained.On the basis of the obtained speeds,numerical simulation was carried out under different fire heat release rates and corresponding critical ventilation velocity.Smoke temperature above the fire soure was obtained.A new critical ventilation velocity formula was presented by analyzing plots mapping according to the obtained data.