Optical experiment platform based on spray combustion visualization of rapid compressor

Abstract

The invention discloses an optical experiment platform based on spray combustion visualization of a rapid compressor. The optical experiment platform is used for simulating the compression stroke of an engine and the spray development and combustion process. The platform comprises a rapid compressor system, a visual combustion chamber, a fuel supply system, a data acquisition system, a schlieren method optical system and the like. The rapid compressor and the visual combustion chamber can provide in-cylinder thermal conditions similar to those of an actual engine. The fuel injector and the fuel supply system can realize injection conditions of different pressures and pulse widths; in-cylinder pressure signals can be collected through the data acquisition system, and experiment images of the spraying development and combustion process are obtained through a schlieren method. The invention provides an experimental platform and method for researching spray development and combustion underthe in-cylinder thermal condition similar to that of an actual engine, provides a technical scheme for in-cylinder spray visualization research, and is beneficial to development of spray combustion mechanism research under high-temperature and high-pressure conditions.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to an optical experiment platform based on fast compressor spray combustion visualization. Background technique [0002] As an important power device, the engine is widely used in the transportation and industrial production of human society, but the increasingly severe energy situation and stricter emission regulations put forward higher requirements for the development of the engine. The fuel injection, evaporation and combustion process in the engine cylinder directly affect the perfection of engine combustion, and then affect the power, economy and emission characteristics of the engine. Therefore, it is necessary to conduct more in-depth research on the in-cylinder spray development process and spray combustion process. However, due to the complex and compact structure of the engine, it is difficult to use non-contact measurement optical methods...

AI Technical Summary

Problems solved by technology

However, due to the complex and compact structure of the engine, it is difficult to observe the actual spray development and combustion conditions in the cylinder by using the optical method of non-contact measurement, and the effect is not good.

It is also difficult to carry out relevant research in spray constant volume combustion bombs to achieve the actual engine injection time and the high temperature and high pressure working conditions when the piston reaches the top dead center.

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