High-pressure metal powder supply system based on pressure difference control

Abstract

The invention aims at providing a high-pressure metal powder supply system based on pressure difference control. The system is suitable for a metal engine and can be used for stably supplying metal powder to a combustion chamber of the metal engine. Air passes a porous board to evenly blow metal powder, meanwhile, the air pressure of a metal powder region and the air pressure of an upper air region are monitored, the air pressure of the upper air region is controlled through a regulating valve on an exhausting pipeline, the pressure different of the upper portion and the lower portion is equal to 0.2 of the atmospheric pressure, and at this moment, the metal powder at the lower portion is blown by air to become gas-solid two-phase flow and is in a stable and even state. The metal powder obtained at this moment is supplied to the combustion chamber so that stable combustion in the combustion chamber can be guaranteed. A pressure sensor is arranged in the combustion chamber to monitor the pressure intensity in the combustion chamber, and it is kept that the pressure intensity in the combustion chamber is smaller than that of the metal powder region all the time. By the adoption of the high-pressure metal powder supply system, the better combustion state can be achieved and the work efficiency of the engine is improved.

Description

technical field [0001] The present invention relates to a metal engine, in particular to a system for supplying metal fuel powder to the metal engine. Background technique [0002] At present, underwater high-speed vehicles need to carry oxidizers themselves. The powder fuel supply device is a key part of a ramjet engine that uses high-energy-density metal-based fuel or metal powder as fuel. Considering the requirements for ignition in the combustion chamber, the powder supply device should provide powder that is uniform in steps and has a stable and reliable flow rate. flow. [0003] In the existing engine supply system, the metal fuel powder grain is cut by high-speed jet to supply the engine for combustion, such as patent CN102644932A. The biggest disadvantage of this supply method is that during the fuel supply process, the metal fuel powder will gradually The reduction will lead to a reduction in the concentration of metal powder in the fuel, and the working efficienc...

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Problems solved by technology

[0003] In the existing engine supply system, the metal fuel powder grain is cut by high-speed jet to supply the engine for combustion, such as patent CN102644932A. The biggest disadvantage of this supply method is that during the fuel supply process, the metal fuel powder will gradually The reduction will lead to a decrease in the concentration of metal powder in the fuel, and the working efficiency of the engine will also decrease with the reduction of the metal fuel powder, and it will not be able to continue to work stably

[0004] In the existing engine supply system, how to uniformly and stably supply metal fuel powder to the combustion chamber has not been well resolved. During the fuel supply process, as the metal powder gradually decreases, the concentration of the supplied metal powder will decrease, and the engine The work efficiency will also decrease with the decrease of the powder concentration and cannot work stably

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