System for researching spray diffusion combustion characteristics of liquid fuel

Abstract

The invention discloses a system for researching spray diffusion combustion characteristics of liquid fuel. The system comprises a constant-volume combustion projectile body, an air inlet system, an exhaust system, an ignition module, a heating module, a high-pressure common rail system, a data acquisition module, a schlieren imaging system, a laser diagnosis system and an electric control unit. The spray diffusion combustion characteristics of different liquid fuel can be researched at different initial pressure and temperatures. In an experiment, a premixed combustible gas which is injected into the constant-volume combustion projectile body in advance can be ignited by using the ignition module; high-temperature and high-pressure environments are generated in the constant-volume combustion projectile body to simulate high-temperature and high-pressure environments, close to a top compression center, in a cylinder of a diesel engine; when the pressure of the constant-volume combustion projectile body is reduced to a set value, a control unit controls an oil atomizer to spray high-pressure fuel into the constant-volume combustion projectile body and the fuel is quickly atomized in the constant-volume combustion projectile body and ignited by compression; and the combustion flame propagation process of fuel compression ignition is synchronously recorded by using the schlieren imaging system and the spray diffusion combustion characteristics of different liquid fuel are researched by combining a laser diagnosis technology.

Description

technical field [0001] The invention relates to the field of test devices for engine combustion processes, in particular to a research system for liquid fuel spray diffusion combustion characteristics. Background technique [0002] The constant volume combustion comb is an important test device for studying the combustion process of an engine. It is a good research carrier between theoretical analysis and practical application. Its principle is to burn fuel in a confined space of constant volume Test to simulate the combustion of the engine piston in the combustion chamber near the top dead center. At present, the research topics of constant volume incendiary bombs focus on laminar premixed combustion and turbulent flow combustion, and there are few studies on liquid fuel spray diffusion combustion in constant volume incendiary bombs. To solve this problem, the present invention proposes a liquid fuel spray diffusion combustion Characteristic research system. Contents of ...

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Problems solved by technology

At present, the research topics of constant volume incendiary bombs focus on laminar premixed combustion and turbulent flow combustion, and there are few studies on liquid fuel spray diffusion combustion in constant volume incendiary bombs. To solve this problem, the present invention proposes a liquid fuel spray diffusion combustion Characteristic Research System

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