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Experimental device for simulating influence mechanism to flame structure flow field characteristics of bottom cross wind

A technology of flame structure and flow field characteristics, which is applied in the field of experimental test equipment for disaster combustion, and can solve problems such as inability to measure

Inactive Publication Date: 2014-11-26
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of device cannot measure the combustion of the fire source and the change of the smoke plume in the upper part of the wind field when the wind is at the bottom of the fire source

Method used

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  • Experimental device for simulating influence mechanism to flame structure flow field characteristics of bottom cross wind
  • Experimental device for simulating influence mechanism to flame structure flow field characteristics of bottom cross wind

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 and 2 As shown, the experimental device for simulating the influence mechanism of the bottom transverse wind on the flame structure and flow field characteristics of the present invention includes a combustion box 4, a wind tunnel system 11 and a measurement and control system 12; the size of the combustion box 4 is 5m × 0.5 m×0.5m, the bottom is an open structure, and a hollow stainless steel tube 3 with a length of 5m, a diameter of 2cm, and a thickness of 1mm is set every 10cm. In order to facilitate the observation of the flame structure and the flow field characteristics of the smoke plume in the experiment, One side is an observation window 15, which is made of fire-resistant glass with a thickness of 5mm. The middle part of the wall corresponding to the observation window 15 is the operation port 7, and the size of the operation port 7 is 0.5m×1m. The size of the end is 2m, and it is made of quartz heat insulation board with a thickness of 8mm, ...

Embodiment 2

[0020] In this embodiment, the fire source 9 and the electronic balance 10 are placed on the end of the combustion box 4 away from the fan, and the wind speed test device 8 is correspondingly arranged at every 0.1m on the top of the fire source 9 oil pool 6, and other settings are the same as those in Embodiment 1. The same; this embodiment can simulate the law of the influence of the bottom wind on the upper flame structure and plume flow field characteristics when the fire source is located on the side and wall away from the fan.

Embodiment 3

[0022] In the present embodiment, a quartz heat shield with a thickness of 2 mm and a width of 0.1 m is placed in the middle of the hollow stainless steel pipe 3 at the bottom of the combustion box 4, and the electronic balance 10 is placed on the quartz heat shield, and other settings are the same as in Embodiment 1; In this embodiment, when there is an obstacle between the wind tunnel system 11 and the combustion box 4, the influence of the bottom wind on the upper flame structure and plume flow field characteristics can be simulated.

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Abstract

The invention discloses an experimental device for simulating an influence mechanism to flame structure flow field characteristics of bottom cross wind. The experimental device comprises a combustion box body, a wind tunnel system and a measurement and control system. The bottom of the combustion box body is provided with an open structure, and hollow stainless steel tubes are arranged every 10 cm on the open structure. One side face of the open structure is an observation window, and an operation opening is formed in the middle of the wall face corresponding to the observation window. The wind tunnel system is placed at the bottom of the air tunnel system and comprises a box body, a fan and a rectifying device. The length, the width and the height of the box body are the same as those of the combustion box body. The upper portion of the wind tunnel system is communicated with the bottom of the combustion box body, and the bottom of the wind tunnel system is close to the ground. The fan is placed at one end of the box body, and the other end of the box body is open. The rest two faces are closed by quartz heat insulation plates with the thickness being 8 mm. The experimental device is used for studying the occurrence regularity of internal fires and plume spreading rules in a limited space when the wind is placed at the bottom of a fire source, and a theoretical support is provided for developing related extinguishing methods and control measures.

Description

technical field [0001] The invention belongs to the technical field of safety engineering testing, and in particular relates to an experimental testing device for disaster combustion. Background technique [0002] During the fire process, the external wind usually plays a decisive role in the occurrence and development of the fire. On the one hand, the wind will provide a large amount of fresh air to the burning area, promote the burning more violently, and may cause the burning area to expand rapidly; casualties and property damage. [0003] At present, the devices used in laboratories to measure the influence of wind on fire combustion are mainly wind tunnels. Such as: (Tao Changfa, Wang Xishi, Zhang Xiaonan. The influence of variable wind direction ventilation on the flame length of pool fire[J]. Combustion Science and Technology, 2013,19(3):261-267.) Introduced a test variable The wind tunnel experimental device for the influence of wind direction and ventilation on t...

Claims

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Application Information

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IPC IPC(8): G01M9/00
Inventor 黄冬梅王信群
Owner CHINA JILIANG UNIV
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