Construction of Fireproof Design Simulation Tool with Water Discharge Equipment

本研究探讨火灾下构件之热特性，并以中、小型试验探讨喷水对构件内部降温之影响，以及（3）开发了模拟程序，对有、无喷水灭火系统进行了模拟设计，并对辐射板进行了喷水灭火的小尺度实验，测量了总热流密度，定量地测量构件内的温度升高。结果表明，水喷淋系统对结构构件起到了有效的防火保护作用，但在构件上形成足够厚的水膜是重要的因素，并通过中尺度辐射板试验研究了构件有效防火所需的最小水膜厚度。将水温引起的膜消失与构件表面温度、加热条件以及水温引起的粘性变化联系起来，分别建立了喷水和不喷水两种情况下构件上的入射热流和构件内的温度历程的模拟程序。该程序对一般微机来说是非常简单和及时有效的，并计算了由于对流和辐射传热减少而引起的水喷淋的热流阻塞。结合目前广泛使用的传热学计算程序和中小尺度试验数据，计算了结构构件内的温度场。

This research (1)investigates the thermal characteristic of structural member when exposing to the fire, (2)affects water spray on reducing temperature within the structural member by small and middle scale experiments, and (3)develops the simulation code to design the fire protection system with and without water spray.Small scale experiment with a radiation panel was conducted under spraying water to measure the total heat flux and temperature rise within the member quantitatively. The result showed that water spray system was effective to protect the structural member, but it could be important factor that the water spray keeps enough thick of water film on the member.Middle scale experiment with a radiation panel was examine to see the minimum thickness of water film for effective fire protection on the structural member. Film disappearance by water temperature, surface temperature of the member, heating condition, and viscosity change due to the water temperature were correlated.A simple simulation code of incident heat flux on the member and temperature history within the member was developed for the case with and without spraying the water. This code is very simple and timely effective for general use PC, and calculates heat flux blockage by water spray due to reduction of convective and radiative heat transfer. Temperature within the structural member with water spray was calculated by combining widely used heat transfer code and data obtained by small and middle scale experiments.