Flowing liquid surface flame propagation characteristic measuring device and experimental method
A technology of flame propagation and flowing liquid, which is applied in the direction of chemical analysis by means of combustion, etc. It can solve the problems that the mechanism of flame propagation cannot be explained, the characteristics of flame propagation on the surface are not considered, and the flame propagation on the surface of the liquid is complicated, etc., and the structure is simple and the cost is low. Effect
Pending Publication Date: 2021-11-05
SHENZHEN POLYTECHNIC
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Problems solved by technology
Due to the fluidity of the liquid itself, the flame propagation on the liquid surface is more complicated than that on the solid surface
[0003] At present, domestic methods and devices for measuring the flame propagation characteristics of liquid surfaces only consider the liquid’s own conditions such as initial liquid temperature, liquid thickness, and liquid width, as well as the influence of external environments such as ambient temperature and altitude.
These methods only focus on the surface flame propagation characteristics of the liquid in a static state, without considering the surface flame propagation characteristics of the liquid in a flowing state, and cannot explain the flame propagation mechanism of the flame in the liquid flow or against the liquid flow
Method used
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[0028] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for exemplary purposes only, and are not intended to limit the protection scope of the present invention.
[0029] It should be understood that the various steps described in the method implementation manners of the present invention may be executed in different orders, and / or executed in parallel. Additionally, method embodiments may include additional steps and / or omit performing illustrated steps. The scope of the invention is not limited in this respect.
[0030] As used...
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The invention provides a flowing liquid surface flame propagation characteristic measuring device and method. The device comprises a liquid flowing system, a schlieren observation system and an imaging system; the liquid flowing system is provided with a liquid flowing groove and a liquid control module, and the liquid control module is used for controlling the flowing speed and the liquid level height of reelable liquid in the liquid flowing groove; the schlieren observation system comprises a light source, a first concave mirror and a second concave mirror, and the second concave mirror, the first concave mirror and the light source are arranged on the two sides of the liquid flowing groove and define a Z-shaped light path; the imaging system comprises an infrared thermal imager which is used for acquiring a temperature distribution image of the flowing liquid in the height direction; and a camera is used for shooting the light which is refracted by the second concave mirror and represents a liquid phase density gradient to form a flame texture image. Through cooperation of the three systems, the propagation characteristics of the flame on a liquid surface when the liquid flows are measured, data and reference are provided for related theoretical simulation and practical application. The measuring device is simple in structure, easy to operate and low in cost.
Description
technical field [0001] The invention relates to the technical field of liquid flame spread, in particular, the invention relates to a device and an experimental method for measuring the flame spread characteristics of a flowing liquid surface. Background technique [0002] Flame spread on solid or liquid surfaces is a common fire phenomenon. Flame propagation on the liquid surface often occurs in liquid hazardous chemicals or hydrocarbon fuels such as petroleum and vegetable oil, and the characteristics of flame propagation are closely related to the physical and chemical properties of the liquid and the external environment in which the liquid is located. Unlike solid materials, flammable liquids will be in a flowing state within a certain time and space range when they leak from liquid storage tanks, transport vehicles, freighters, etc. Due to the fluidity of the liquid itself, the flame propagation on the liquid surface is more complicated than that on the solid surface....
Claims
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Login to View More IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 魏瑞超黄申石赵晨张景然董铸荣梁松峰
Owner SHENZHEN POLYTECHNIC