Isobaric combustion device for quenching test

Abstract

The invention discloses an isobaric combustion device for a quenching test. The isobaric combustion device comprises a shell, a pressure stabilizing cavity, a main combustion cavity, an auxiliary combustion cavity and the like. A plurality of auxiliary combustion cavities are evenly distributed in the end of the shell in the circumferential direction, and a main combustion cavity and a pressure stabilizing cavity are formed in the shell. Air inlet holes are formed in the side wall of the main combustion cavity, the main combustion cavity is communicated with the auxiliary combustion cavities, and quenching channels are formed between the main combustion cavity and the auxiliary combustion cavities; the main combustion cavity and the pressure stabilizing cavity are separated by a diaphragm; the main combustion cavity and the auxiliary combustion cavity are filled with evenly-mixed combustible gas in advance, nitrogen is contained in the pressure stabilizing cavity, and the initial pressure in the main combustion cavity, the initial pressure in the auxiliary combustion cavity and the initial pressure in the pressure stabilizing cavity are the same. The side wall of each auxiliary combustion chamber is provided with a thermocouple, and the tail end of each auxiliary combustion chamber is provided with an optical glass window. The device provided by the invention is used for carrying out a quenching test in a constant combustion pressure environment, and can realize 0-10MPa isobaric combustion.

Description

technical field [0001] The invention relates to an isobaric combustion device. Background technique [0002] In a thin layer next to a solid wall, the combustion reaction is suppressed, ie quenched at the wall. For the flow channel, when the characteristic scale of the channel section is smaller than the critical value, the entire flow channel is in the quenching thin layer, and the flame cannot propagate in the channel and is extinguished. When the flame happens to be quenched, the characteristic scale of the channel section is called the quenching critical scale. Grasping the critical dimension of quenching is the basis of using quenching effect (such as the design of injector and flame arrester of combustion device). [0003] The critical scale of quenching is related to combustion parameters such as combustion pressure, reactant components, mixing ratio, initial temperature and initial temperature of quenching wall. Due to the inherent danger of high-pressure combusti...

AI Technical Summary

Problems solved by technology

Due to the inherent danger of high-pressure combustion, the traditional quenching test method is to place the quenching structure in a constant-volume combustion chamber (that is, an incendiary bomb), and the pressure of constant-volume combustion fluctuates violently with time, so it cannot accurately reflect the relationship between combustion pressure and quenching. Functional relationship of the critical scale

Images