Stairwell fire simulation experimental apparatus of super high-rise buildings

Abstract

The invention provides a stairwell fire simulation experimental apparatus of super high-rise buildings. The experimental apparatus comprises an experimental apparatus body, a pressurized air supply system, and a supporting measurement and control system. The experimental apparatus body comprises a stairwell, a front chamber and a room construction structure which are corresponding with actual multi-story buildings or super high-rise buildings and are undersize; and the experimental apparatus body is built by steel tubes and formed by welding and sealing steel plates, and refractory glass is adopted for the front face and the right side face. The air output of the pressurized air supply system can be adjusted, thus being capable of fully carrying out studies on a series of fundamental theoretical problems and practical engineering problems in fume flow and control of the super high-rise buildings; a large number of high-temperature glass viewing windows and aided viewing systems are adopted in the experimental apparatus, thus being capable of clearly observing the real-time phenomenon of the fume movement; and a methanol plus incense coil missing fume mode is adopted for fire source selection, thus ensuring safety and cleanness during the whole experimental process and being capable of actually simulating real fire. The stairwell fire simulation experimental apparatus of super high-rise buildings has wide application prospect in design and test evaluation of the fire pressurized air supply system of the super high-rise buildings.

Description

technical field [0001] The invention belongs to the technical field of fire safety, and in particular relates to an experimental simulation device for testing the fire smoke flow and control system in a stairwell of a super high-rise building. Background technique [0002] In recent years, more and more super high-rise buildings and their fire safety issues have attracted widespread attention. Super high-rise buildings, also known as skyscrapers, usually refer to high-rise buildings with more than 40 or 50 floors. It is a special type of high-rise Buildings; in my country, buildings with a building height of more than 250 meters are called super high-rise buildings. In the fire problem of super high-rise buildings, the stairwell of the evacuation channel is called the focus of concern, because these channels may invade the smoke during a fire and become a channel for the smoke to spread, threatening the safety of personnel. According to the measurement, the diffusion speed o...

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Problems solved by technology

Marshall built a 1 / 5 scale five-story stairwell experimental device, studied the smoke movement process in the open stairwell, measured the temperature of the flue gas in the stairwell experimental device, and the mass flow rate through the door of each floor, etc., but The smaller the scale of the small-scale experimental model, the more prominent the contradiction between maintaining the consistency of the dimensionless Fr number and the consistency of the experimental phenomenon, that is, on the basis of keeping the Fr number consistent, the smaller the experimental model, the Re number and The greater the actual difference, the greater the difference between the experimental phenomenon and the actual; the National Research Institute of Canada (NRCC) built a 10-story fire research experiment tower in Ottawa to carry out full-scale experimental research on smoke control systems, but for stairwell smoke There are few studies on air movement and pressurized air supply in stairwells, and there is no comprehensive and systematic study. Due to the complexity and randomness of actual fires, the cost of full-scale experiments is high, which is greatly affected by various factors and has poor repeatability. Therefore, a full-scale experimental device is not a good choice for carrying out a large number of experimental studies and finding out some of the laws that exist therein.

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