Test device of droplet evaporation and ignition based on dielectric barrier discharge

Abstract

The invention discloses a test device of droplet evaporation and ignition based on dielectric barrier discharge. The device comprises a test chamber, a high-voltage power supply, a droplet injector, three L-shaped metal rods, a metal reticular cylinder, two metal bars, a high-voltage metal screen and a low-voltage metal plate, wherein a metal wire is arranged in the rod core of a droplet hanging rod in the droplet injector, and the droplet hanging rod is coated with quartz or ceramic; a first bottom end of the L-shaped metal rods is connected with the metal reticular cylinder; both a second bottom end of the L-shaped metal rods and a third bottom end of the L-shaped metal rods can both be detachably connected with the metal bars or the high-voltage metal screen or the low-voltage metal plate. By changing the installation mode of the L-shaped metal rods and the connection mode of the high-voltage power supply, three kinds of electrode arrangement modes can be realized, including coaxial electrode arrangement, parallel stigma electrode arrangement and parallel screen electrode arrangement. The test device of droplet evaporation and ignition based on dielectric barrier discharge has the advantages of improving the current situation of slow ignition, difficult ignition and unstable flame of liquid propellants, especially hydrocarbon liquid fuel, and realizing the active control of working medium evaporation and ignition process of the liquid propellants.

Description

Technical field [0001] The invention relates to the technical field of plasma assisted combustion, in particular to a droplet evaporation and ignition test device based on dielectric barrier discharge. Background technique [0002] Propellant is the source of energy for the power plant of transportation vehicles. Among the common propellants, liquid propellant has a higher density than gas, so that a storage tank with a limited volume can carry more fuel or oxidant, and is comparable to solid propellant. Compared with, the use of liquid propellant has the advantages of repeated ignition and easy control, so that the liquid propellant represented by gasoline and kerosene has been most widely used in automobiles, ships, airplanes, and rockets. However, the combustion of liquid fuel is not like the simple mixing and ignition of gaseous fuel to achieve combustion, but through a series of sub-processes. Specifically, it includes atomization, evaporation, mixing, and combustion. The s...

AI Technical Summary

Problems solved by technology

However, most of the current discharge plasma ignition and combustion-supporting devices are only for gas propellants, and most of them use a relatively mature arc discharge method, that is, a plasma torch. This type of ignition method will generate extremely high-temperature plasma, and the discharge device requires additional Water-cooled, the ionization efficiency of the fuel is also relatively low, and the energy consumption is very high

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