Experimental system for measuring propagation speed of laminar premixed flame under high pressure

A technology of flame propagation velocity and experimental system, which is applied in the field of experimental system for measuring laminar premixed flame propagation velocity under high pressure, and can solve the problems of inability to measure the flame propagation velocity and error of liquid fuel or gaseous fuel and oxidant
CN103759775AInactive Publication Date: 2014-04-30NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2014-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an experimental system for measuring propagation speed of a laminar premixed flame under high pressure. The experimental system is fixed to a rack, a laser and an ICCD camera are arranged at the positions, opposite to two observation windows, on a high pressure cavity, and the ICCD camera is connected with a computer. A constant pressure valve is arranged at the top of the high pressure cavity, a high-pressure nitrogen connector and a nozzle are arranged at the bottom of the high pressure cavity, and the high pressure cavity is inflated with high-pressure nitrogen through the nitrogen connector. Preheated oxidants and preheated fuel are sprayed into the high pressure cavity through the nozzle after passing through a premixer, premixed gas is ignited by a sparking plug, and the numerical value of a volume flowmeter is read. The propagation speed of the laminar premixed flame is calculated according to the numerical value of the volume flowmeter and the area of an outlet of the nozzle. The laminar premixed flame propagation speed under different equivalence ratios is acquired by adjusting the flow of the oxidants and the fuel. The laminar premixed flame propagation speed under different environmental pressures is acquired by changing the pressure of the high pressure cavity. Flame component distribution diagrams and temperature profiles under all work conditions are acquired through a PLIF system.
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Description

technical field

[0001] The invention relates to an experimental system for measuring laminar premixed flame propagation velocity under high pressure, in particular to an experimental system for measuring the unstretched laminar premixed flame propagation velocity of preheated fuel and oxidant under high pressure environment. Background technique

[0002] Laminar premixed combustion is an important content in the study of combustion mechanism and an important means to develop and verify the kinetic mechanism of chemical reaction of fuel combustion. At present, the establishment of a theoretical model based on the kinetic mechanism of chemical reactions to simulate and calculate the characteristics of laminar flames is limited to some small molecular gases. Experiments are still an effective method to study the characteristics of laminar flames. The experimental methods for measuring laminar premixed flame propagation velocity can basically be divided into two categories: one ...

Claims

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