Premixed combustible gas turbulence and burning explosion process characteristic parameter testing device and method

Abstract

The invention discloses a premixed combustible gas turbulence and burning explosion process characteristic parameter testing device and method. The device comprises a flowing combustion tube, a hollow structure of the flowing combustion tube providing a space for flowing and burning of premixed combustible gas, a barrier generating turbulence being arranged in the hollow structure, an ignition electrode being inserted into the gas inlet side of a tube body of the flowing combustion tube, an opening being formed in one end far away from the tube body air inlet side; a particle image velocity measurement unit, used for measuring flow field characteristic parameters in the combustion process of the premixed combustible gas in the turbulent flow state; and a laser-induced fluorescence imaging unit, used for synchronously measuring flame characteristic parameters in the flowing process of the premixed combustible gas in the turbulent flow state. The device and the method can accurately capture flames and flow field structures in the burning and explosion process of combustible gas in a turbulent flow 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 turbulent flow state of premixed combustible gas under certain temperature and pressure conditions and the characteristic parameters of the combustion and explosion process, flame form, flow field structure, etc. 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 saf...

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 laws of combustion and explosion of combustible gases at different temperatures and pressures; (3) At present, experimental tests are mainly aimed at intermittent gas jets or static gases, which are very different from the actual continuous flow and turbulent state

[0004] The current testing devices and methods for combustible gas explosion parameters are only for static gas, and the test temperature and pressure ranges are limited (generally 0-200°C, 0-5Mpa). The process characteristic parameter experimental testing device and method can accurately capture the flame and flow field structure in the process of combustible gas explosion under turbulent flow, so as to reveal the interaction relationship between gas flow and flame propagation, and study different pressure, temperature, turbulent flow The flow field distribution, concentration distribution, flame propagation velocity, explosion limit and explosion pressure of combustible gas in the state

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