General release source device for building ventilation and smoke exhaust experiment

Abstract

The invention relates to a general release source device for building ventilation and smoke exhaust experiment. The device comprises a medium injection pipe and a buffer cavity, wherein the buffer cavity is connected with the lower end of the medium injection pipe; the cavity wall at the joint of the buffer cavity and the medium injection pipe is provided with a medium injection port; the interior of the buffer cavity is provided with interior flow guide pore plates; the bottom of the buffer cavity is provided with an outlet flow guide pore plate; medium enters the interior of the buffer cavity through the medium injection port from the medium injection pipe and then flows through the interior flow guide pore plates, and flows out from the outlet flow guide pore plate; the medium flowing out from the outlet flow guide pore plate is fluid with low speed and high turbulence. Compared with the prior art, through combined action of the medium injection port and guide holes mutually staggered on the three pore plates, the fluid turbulence is increased while the medium flow speed is reduced, the problem that low speed and high turbulence cannot be achieved at the same time since the initial quantity of motion of a medium flow in a ventilation and smoke exhaust medium experiment is not zero is solved, and the error of the experiment is greatly reduced.

Description

technical field [0001] The invention relates to the field of thermal plume ventilation and smoke exhaust, in particular to a general release source device used in building ventilation and smoke exhaust experiments. Background technique [0002] With the rapid development of the economy and society, the level of construction technology and the improvement of people's living standards, more and more tall and large space buildings have become residential spaces for people to work and live, such as shopping malls, cinemas, stadiums, factories, transportation hubs, etc. In modern buildings, in order to meet the growing pursuit of people's quality of life, various types of atriums and other tall spaces continue to emerge in buildings, which put great pressure on the ventilation and smoke prevention of buildings. At present, the following problems exist in the ventilation and smoke exhaust design of tall and large space buildings: [0003] 1. Due to the convective plume ventilatio...

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Problems solved by technology

[0004] 2. In the smoke exhaust design of tall spaces, thermal stratification caused by flue gas thermal convection plumes is also a common phenomenon in indoor fires and smoke movement. The regulations on the amount of mechanical smoke exhaust still only consider the number of air changes according to the volume; they do not take into account the characteristics of the fire source and the characteristics of the tall space itself that may occur

[0007] In order to solve the problem that the momentum released by the medium is not zero, the invention provides a release device for simulating the characteristics of high turbulence and low velocity of heat sources in building ventilation and smoke exhaust experiments

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