Droplet evaporation test device

Abstract

The invention provides a droplet evaporation test device comprising a shooting system, a heating device and a micro sample injector; the heating device comprises a heating coil, the top of the heatingcoil is provided with a through hole, and the micro sample injector passes through the through hole, then extends into the heating coil and does not make contact with the inner wall of the heating coil; the micro sample injector is hung on an iron stand; the interior of the heating device is provided with a temperature regulator for regulating the temperature inside the heating coil; the shootingsystem comprises a high speed video camera and a diffused light source, and the high speed video camera is located at one side of the heating coil and is used for shooting droplets produced by the micro sample injector; the diffused light source is located at the other side of the heating coil. The droplet evaporation test device also comprises a pressure chamber and a pressurization system. An evaporation state of fuel oil in a combustion chamber can be truly simulated through the heating device and the pressure chamber, and the problem that suspension droplets are evaporated under high temperature and high pressure environments of a combustion chamber is solved.

Description

technical field [0001] The invention relates to the field of droplet evaporation, in particular to a droplet evaporation test device. Background technique [0002] The shape change and evaporation rate of fuel droplets in the evaporation process have an important impact on its application. Fuels with different evaporation characteristics are injected into the combustion chamber of the engine, and due to the different evaporation rates, the combustion characteristics are also different. [0003] The existing evaporation device is a sessile droplet evaporation test device, which uses an aluminum flat plate to heat the droplet. This device can only be used to study the evaporation of sessile droplets, and this device has no pressure chamber, so the droplet cannot be measured. Evaporation under high pressure. However, for the fuel in the engine combustion chamber, the main factors affecting its evaporation are temperature and pressure, and the fuel is sprayed into the combusti...

AI Technical Summary

Problems solved by technology

[0003] The existing evaporation device is a sessile droplet evaporation test device, which uses an aluminum flat plate to heat the droplet. This device can only be used to study the evaporation of sessile droplets, and this device has no pressure chamber, so the droplet cannot be measured. Evaporation under high pressure

However, for the fuel in the engine combustion chamber, the main factors affecting its evaporation are temperature and pressure, and the fuel is sprayed into the combustion chamber and atomized immediately to form small droplets, most of which are in a suspended state, which cannot be provided by existing technologies High pressure evaporative environment in engine combustors

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