Multi-initial-state fuel transient reaction flow field parameter testing system

Abstract

The invention provides a multi-initial-state fuel transient reaction flow field parameter testing system. The system is composed of a gas premixing system, a main body reaction device, an imaging system and a measurement and control system. the main body reaction device is the core equipment of the system; a liquid steam injection pipeline, a reactor, a heater, a temperature and pressure sensor, a cleaning agent nozzle, a blow-off pipe and other parts are integrated in a movable equipment vehicle; and the main body reaction device is used for completing the processes of standing premixing, radiation heating, spark ignition, transient reaction, cleaning and decontamination and the like of explosive mixtures. The system can realize transient reaction flow field testing of pure gas and liquid steam fuels with an initial temperature range of 300K-700K, an initial pressure of 0 bar-5 bar and any equivalence ratio within an explosion limit, provides original data for deep research of a combustion and explosion flame propagation mechanism, and provides technical support for the fields of energy utilization, turbine engineering, aerospace propulsion and the like.

Description

technical field [0001] The invention belongs to the technical field of transient reaction flow field testing, and in particular relates to a multi-initial state fuel transient reaction flow field parameter testing system. Background technique [0002] The combustion and explosion of explosive mixtures belong to the transient reaction process, and the measurement of flame propagation velocity is the foundation and difficulty of the current transient reaction flow field research. At present, the measurement methods for the flame propagation velocity mainly include the Bunsen burner flame method, the opposite flame method and the closed combustion chamber method. Among them, the Bunsen burner has a simple structure and is easy to operate, but because the flame has a heating effect on the airflow, and the tube wall has a cooling and heat dissipation effect on the airflow close to it, the laminar flow velocity is different in different regions, and it is also affected by the nega...

AI Technical Summary

Problems solved by technology

[0003] There are many limitations and deficiencies in the existing experimental systems and platforms: the quantitative injection of liquid fuel vapor cannot be realized; the transient reaction process in the initial state of high temperature cannot be studied; there is no automatic cleaning device, and the chamber needs to be opened for cleaning after each experiment. It is complex and cannot guarantee the sealing; there is no simultaneous temperature and pressure test, which makes little contribution to the study of the flame propagation mechanism of detonation; the components are scattered, occupying a large space, and the level of integration and automation is low

[0004] Therefore, for the fuel mixture in the initial state of high temperature and high pressure, the precise control of the equivalence ratio in the transient reaction in which the liquid fuel participates, and the simultaneous testing of the flame propagation process, pressure wave, and heat conduction, there is currently no effective testing system.

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