System and method of kerosene switching of active cooling subsonic combustion ramjet engine

A sub-combustion ramjet, active cooling technology, applied in ramjet engines, mechanical equipment, etc., can solve problems such as kerosene density reduction
CN103557091AActive Publication Date: 2014-02-05合肥中科重明科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
合肥中科重明科技有限公司
Publication Date
2014-02-05

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Abstract

The invention discloses a system and a method of kerosene switching of an active cooling subsonic combustion ramjet engine. The system comprises a main kerosene transport pipe, a supercritical kerosene pipe, a liquid kerosene pipe, a control system, a kerosene switching valve, a temperature sensor and a sonic nozzle flow meter. The sonic nozzle flow meter is arranged on the main kerosene transport pipe and an outlet of the sonic nozzle flow meter is connected with the supercritical kerosene pipe and the liquid kerosene pipe. The control system is connected with the temperature sensor and the kerosene switching valve. The kerosene switching valve is opened for enabling the supercritical kerosene pipe and the liquid kerosene pipe to be in the connected state when the control system detects that the kerosene temperature is in the supercritical state through the temperature sensor. According to the system and the method of the kerosene switching of the active cooling subsonic combustion ramjet engine, the subsonic combustion ramjet engine can be smoothly changed from the operating state of a liquid kerosene combustion state to a supercritical kerosene combustion state, so that the prior condition that the subsonic combustion ramjet engine can only use liquid kerosene combustion can be changed.
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Description

technical field

[0001] The invention relates to the field of sub-combustion ramjet engines, in particular to a system and method for actively cooling sub-combustion ramjet fuel switching. Background technique

[0002] Actively cooled subsonic combustion ramjet requires the use of on-board fuel kerosene to cool and protect the walls of the engine's combustion chamber, and then spray the kerosene into the combustion chamber for combustion. The use of fuel kerosene to cool the combustion chamber has several obvious advantages: one is to cool the combustion chamber, protect the combustion chamber from combustion damage, and prolong the working life of the combustion chamber; the other is to preheat the fuel, improve combustion efficiency and obtain greater The third is that due to the cooling protection, the wall thickness of the combustion chamber can be reduced, the weight of the engine can be reduced, and a greater load capacity can be obtained.

[0003] However, when workin...

Claims

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