Fly dropping type single liquid droplet combustion system

Abstract

The invention relates to a fly dropping type single liquid droplet combustion system. The fly dropping type single liquid droplet combustion system comprises a liquid droplet conveying unit, a combustor unit, an air supply unit and a recording unit, wherein the liquid droplet conveying unit comprises a trace syringe, a syringe tube and a needle; the combustor unit comprises a base, an outer casing and a porous combustion disc; an outer retaining ring is arranged at the upper part of the porous combustion disc, and the outer retaining ring and the porous combustion disc form a high temperature area for combusting the single liquid droplet; the air supply unit comprises air blowing equipment and a fuel air cylinder; the recording unit adopts high-speed camera equipment which is connected with a computer, and is used for shooting the combustion state of the single liquid droplet in the high-temperature area. Compared with the prior art, the fly dropping type single liquid droplet combustion system has the advantages that by controlling the flow rate of fuel gas, the 700K-1500K wide high temperature range can be produced, and the single liquid droplet can be quickly evaporated and combusted; the single liquid droplet is produced by pressing a piston cylinder of the syringe, and is positioned at the tail end of the needle of the syringe, and the liquid droplet freely drops down under the gravity action, and enters the high-temperature area to evaporate and combust; the fly dropping type single liquid droplet combustion system is suitable for various types of viscous liquid.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engine combustion, and in particular relates to a flying drop single droplet combustion system. Background technique [0002] In-cylinder direct injection and supercharging have become the mainstream direction of gasoline engine technology today. However, with the miniaturization of engines and the improvement of power performance, a new abnormal combustion phenomenon has appeared in supercharged gasoline direct injection engines—premature combustion, early Combustion seriously affects engine performance and service life. The low-velocity pre-ignition induced by lubricating oil droplets entering the engine combustion chamber is considered to be an important factor. Therefore, it is particularly necessary to study the combustion process of lubricating oil single droplets. However, at present, there is a lack of experimental equipment for the single-droplet combustion process, and most ...

AI Technical Summary

Problems solved by technology

However, at present, there is a lack of experimental equipment for the single-droplet combustion process, and most of the droplet generators of related technologies are aimed at low-viscosity liquid fuels, which are difficult to meet the use of high-viscosity liquids such as lubricating oil.

[0003] The Chinese patent application number 201310226776.0 discloses a high-temperature, high-pressure single-droplet evaporation and combustion device, including a gas supply device, a combustion and evaporation projectile connected to the gas supply device, and a single-liquid vaporization projectile located on the upper part of the combustion and evaporation projectile. Droplet generator and single droplet generator cooling device, and a control unit connected with the combustion evaporation projectile through wires; the single droplet generator includes a piezoelectric plate injector located inside it; The single-droplet generator cooling device includes a water pump connected to the single-droplet generator and a thermocouple wire temperature sensor located inside the single-droplet generator. This patent can realize the evaporation and combustion characteristics of tiny droplets research, but the device uses a piezoelectric plate injector, which mainly relies on small changes in the volume of the liquid chamber to produce a single droplet, which is not suitable for viscous liquids such as lubricating oil; the high temperature method generated by the device is Use a thermocouple to heat the air and then heat the droplets through the air to make them evaporate and burn. This method can produce a limited range of temperature changes, and the droplets cannot be completely evaporated and burned directly during the droplet falling process, and unburned droplets will remain. In the incendiary body, it has a certain negative effect on the evaporation and combustion of droplets and the stability of the temperature field

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