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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

Active Publication Date: 2014-02-05
合肥中科重明科技有限公司
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Problems solved by technology

At this time, the density of kerosene decreases sharply with the temperature, and the nozzle holes on the combustion chamber used to inject liquid kerosene are no longer suitable for injecting supercritical kerosene. Actively cooled subsonic combustion ramjet is required to be able to use supercritical kerosene for combustion. However, there are no reports related to

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

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Embodiment Construction

[0021] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0022] Such as figure 1 As shown, the main body of a subsonic combustion ramjet is composed of an intake port, a combustion chamber and an exhaust nozzle. The intake port is connected to the combustion chamber by two arc-shaped passages; the combustion chamber is circular in section and consists of two cylinders with different diameters; the exhaust pipe section is also circular, and the exhaust pipe shrinks first and then expands. The parts that need to be cooled in the experiment include the combustion chamber and the exhaust pipe. Cooling passages are provided in the walls of the combustion chamber and the exhaust pipe, and kerosene flows through the cooling passages to tak...

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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.

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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Application Information

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IPC IPC(8): F02K7/10
Inventor 袁涛陆阳李龙王晶孟令瑾范学军
Owner 合肥中科重明科技有限公司
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