Combustible gas flowing and burning explosion process characteristic parameter testing device and method

Abstract

The invention discloses a combustible gas flowing and burning explosion process characteristic parameter testing device and method, and the device comprises a flowing combustion tube, the hollow structure of the flowing combustion tube providing a space for the flowing and burning of combustible gas, and the flowing combustion tube being filled with normal-pressure air before testing; an ignition electrode being inserted into the gas inlet side of a pipe body of the flowing combustion pipe, and an opening being formed in one end away from the gas inlet side of the pipe body; a particle image velocity measurement unit, used for measuring flow field characteristic parameters after the flowing combustible gas is combusted; and a laser-induced fluorescence imaging unit, used for synchronously measuring flame characteristic parameters after the flowing combustible gas is combusted. The device and the method provided by the invention can be used for testing the characteristic parameters of the combustible gas in the continuous flowing and explosion process under different pressures and temperatures, and accurately capturing the flame and flow field structure in the combustible gas explosion process in the flowing state.

Description

technical field [0001] The invention relates to the field of combustible gas explosion protection, in particular to a device and method for testing the flow of combustible gas under certain temperature and pressure conditions and the characteristic parameters, flame form, flow field structure, etc. of the combustion and explosion process. Background technique [0002] The safety of combustible gases such as hydrogen and methane runs through all aspects of their production, storage, transportation and use. Combustible gases generally have the characteristics of low molecular weight, low ignition energy, and wide explosion limit range, which are easy to leak and cause fire and explosion accidents. Especially under the conditions of high temperature and high pressure in process equipment, combustible gas is prone to combustion and explosion, which poses a serious threat to operators and equipment. The mechanism of gas explosion and the development of safety protection technolog...

AI Technical Summary

Problems solved by technology

However, the current test devices and methods for combustible gas combustion and explosion characteristics have the following problems: (1) The experimental devices can only test the combustion and explosion parameters of stationary combustible gases under different initial conditions, while the flame structure, jet flow field, etc. The fine structure of the explosion process cannot be captured effectively, and it cannot accurately reflect the interaction mechanism between gas flow and combustion; The combustion and explosion laws of combustible gases under different temperatures and pressures; (3) The current experimental tests are mainly aimed at intermittent gas jets or static gases, which are very different from the actual continuous flow conditions

[0004] The current testing devices and methods for combustible gas explosion parameters are only for static gas, and the test temperature and pressure range are limited (generally 0-200°C, 0-5Mpa). Therefore, there is an urgent need for a combustible gas continuous flow and The experimental testing device and method for the characteristic parameters of the combustion and explosion process can accurately capture the flame and flow field structure in the combustion and explosion process of the combustible gas in the flow state, so as to reveal the interaction relationship between the gas flow and the flame propagation, and study different pressures and temperatures. , flow field distribution, concentration distribution, flame propagation velocity, explosion limit and explosion pressure of combustible gas in the flowing state, etc.

Images