中文摘要：

运用相似理论对火灾探测标准燃烧室建立1/10的相似模型试验箱,确定火灾试验所涉及的主要相似准则关系,并通过FDS数值模拟对其相似有效性进行分析。通过模拟试验,讨论火灾探测中关心的3 m环及羽流中心线上烟气参数的变化及其相似性。模拟试验数据表明,在火灾研究误差范围内,该模型试验箱在烟气温升及运动特性上可以对原型标准燃烧室进行较好的模拟。

英文摘要：

The purpose of this paper is to introduce an improved scale modeling method for studying the full scale standard combustion room fire detection by using a small scale experiment, as well as investigate the validity of this kind of method aiming at experimenting the room fire scenario. For our research purpose, we would like first of all to introduce the Froude scaling model to set up a piece of 1/10 bench-scale equipment as a prototype of a GB 4715—2005 standard combustion room. In addition, we have also provided the relationships of geometrical scale, velocity dimension, time dimension, temperature, fire source strength, the wall effect between the prototype （the full scale combustion room with 10 m long, 7 m wide and 4 m high） and the model （the 1/10 bench-scale equipment） based on the theory and hypothesis proposed by Froude scaling model. Since the main scaling relations were presented, we have worked out a fire dynamics-simulator numerical simulation software in reference to the National Institute of Standards and Technology of America （FDS Version 5.1） to evaluate the validity of the given scaling model and the corresponding relationships. In the above said FDS software, an eddy simulation method was included to solve the Navier-Stokes equations for the fluid field, the method was widely used in Fire research, and may help us to produce a relatively reasonable digital reconstruction model for the real fire scenario. According to the simulation results, we have done careful study of the smoke characters in fire plume central line and the 3m ring, which are of essential importance in the standard combustion room, along with the discussion of the comparability of smoke parameters such as temperature and velocity in both bench-scale and full-scale experiments. The results of our study show that, the 1/10 scaling model can forecast the smoke characters of the prototype within a reasonable error range for fire safety engineering research. Moreover, we have also introduced a classic enclosure fire pl