Supersonic speed combustion chamber scheme of step / groove composite injection structure

Abstract

The innovation of the invention is to provide a proposal for an ultrasonic velocity combustion chamber with a novel step / groove composite jet structure. The proposal is characterized in that fuel nozzles are additionally arranged in the front of a step and a groove of the combustion chamber and are jointly used for fuel jet and use in the combustion chamber. In the design proposal, design proposals of a jet structure of the step and a fuel nozzle structure in the front of the groove are applied in the ultrasonic velocity combustion chamber, and correspondingly improved types of the ultrasonic combustion chambers thereof. The proposal of the designed composite jet structure can ensure evenly jetting of fuel in the ultrasonic velocity combustion chamber, and achieve full mixing of the fuel and air in a low-speed flowing area in the combustion chamber, so as to ensure ignition and stable combustion of the fuel in ultrasonic velocity air flow. Compared with the proposal of a nozzle in the prior ultrasonic velocity combustion chamber, total pressure in the combustion chamber has little loss, thereby shortening structural size of the ultrasonic velocity combustion chamber, improving performance of the whole ultrasonic power system, and having considerable potential economic benefit and value. The proposal for the ultrasonic velocity combustion chamber mainly comprises designs of parts such as the step jet structure in the combustion chamber, the groove, the jet structure in the front of the groove.

Description

1. Technical field [0001] One of the key technologies of scramjet and sub-combustion ramjet is to adopt effective combustion chamber and fuel injection structure, inject fuel into the combustion chamber better, and realize the full mixing of fuel and air as soon as possible, in the shortest possible time Combustion is realized in the combustion chamber space, so that the fuel fully releases chemical energy, which is converted into heat energy of the airflow, and further converted into kinetic energy of the engine power system. However, it should be noted that in the combustion chamber of these engines, the velocity of the airflow is generally very high, the residence time of the airflow in the combustion chamber is very short, often on the order of milliseconds, and the space for fuel mixing is also very limited. Therefore, the injection, ignition and stable combustion of fuel become the key issues to be solved in the combustion of these ramjet power systems. However, in the ...

AI Technical Summary

Problems solved by technology

However, there is no new proposal on how to make full use of the flame stabilization effect of the groove structure, and how to combine the fuel injection structure and the groove to achieve high-efficiency composite fuel injection, mixing, effective ignition and stable combustion.

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