A device for the experiment of spraying and wall-impacting combustion in constant-volume projectiles

Abstract

The present invention belongs to the field of the natural gas engine experiment research, and relates to a device for a spray-wall impingement combustion experiment in a constant volume bomb. The device comprises a nozzle pedestal, a combustion chamber model stand and a combustion chamber model. The combustion chamber model stand includes a first guide rail, a second guide rail, a third guide rail, a fourth guide rail and a combustion chamber model base; the upper ends of the first guide rail and the second guide rail are detachably connected with the nozzle pedestal; the lower end of the first guide rail is detachably connected with the third guide rail through a first bolt, and the first bolt is moved in a first through groove and a third through groove; the lower end of the second guide wall is detachably connected with the other end of the third guide rail through a second bolt, and the second bolt is moved in the second through groove; and the combustion chamber model base is installed on the combustion chamber model stand, the combustion chamber model stand is movably connected with the fourth guide rail, and the four guide rail is movably connected with the third guide rail. The device for a spray-wall impingement combustion experiment in a constant volume bomb is able to freely regulate the position of the combustion chamber model without the influences on optical paths of optical experiments such as schlieren, PLIF and the like.

Description

technical field [0001] The invention belongs to the field of natural gas engine experiment research, and in particular relates to a device used in a constant-volume bomb internal spray collision wall combustion experiment. Background technique [0002] As fuel contradictions become increasingly prominent and automobile emission regulations become increasingly stringent, natural gas, as a clean alternative fuel, is increasingly valued by researchers. Due to the high-pressure direct-injection technology used in diesel-piloted direct-injection natural gas engines, its working principle is that when the compression stroke is nearing the end, a small amount of diesel is first injected into the cylinder to make it spontaneously ignite and increase the temperature and pressure in the cylinder to form an ignition source. , and then use high pressure to directly inject natural gas into the cylinder, and the natural gas ignited by diesel will burn to do work. This type of engine can ...

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Problems solved by technology

There is currently no experimental equipment that meets the above requirements

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