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Start method and device for active-cooling scramjet engine

A technology of ramjet and active cooling, which is applied in the field of ramjet to achieve the effects of stable starting, reduced ignition energy and stable flame

Active Publication Date: 2018-08-17
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, starting the ramjet engine in this way requires acetylene assistance, so you need to carry ethylene-related storage and other equipment; and you need to install a device to ignite acetylene

Method used

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  • Start method and device for active-cooling scramjet engine
  • Start method and device for active-cooling scramjet engine
  • Start method and device for active-cooling scramjet engine

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Embodiments of the present invention provide a starting method for an actively cooled scramjet engine and an actively cooled scramjet engine. When starting an actively cooled scramjet engine, cold kerosene is injected into the combustion chamber, and a The flame stabilizing device of the combustion chamber of the ramjet engine is supplemented with a liquid oxidant inside, and the flame stabilizing device is used to stabilize the flame of ke...

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Abstract

The invention provides a start method and device for an active-cooling scramjet engine. The start method for the active-cooling scramjet engine comprises the steps that when the active-cooling scramjet engine begins to be started, a first row of injection holes in the upstream inner wall of a flame holder arranged in a combustion chamber of the active-cooling scramjet engine are opened, cold-statekerosene is injected into the combustion chamber, meanwhile, oxidizing agent injection holes are opened to inject an oxidizing agent, and ignition is conducted; when the kerosene pressure in a cooling channel of the combustion chamber reaches a set pressure threshold, a second raw of injection holes formed in the inner wall of the combustion chamber are opened, and hot-state kerosene is injected;the flame stability and combustion performance in the opening process of the oil injection holes are ensured, and thus, stable start of the active-cooling scramjet engine is achieved. Compared with common start of ramjet engines, acetylene assistance is not needed, and meanwhile, ignition energy is saved.

Description

technical field [0001] The invention relates to the field of ramjet engines, in particular to a starting method and a starting device for an actively cooled scramjet engine. Background technique [0002] The scramjet is one of the ideal powers for near-Earth space flight. The specific impulse of a ramjet is much higher than that of a rocket at flight Mach numbers between 4 and 7. Because the scramjet engine uses the air passage to compress the air to obtain the oxidant, the scramjet engine does not need to carry a large amount of oxidant, and the application on the aircraft reduces the weight of the aircraft and increases the specific impulse of the fuel. Moreover, the scramjet engine is only composed of an intake port, a combustion chamber, and an exhaust nozzle, and does not require rotating parts such as a compressor and a turbine. The structure is simple, low in cost, and easy to maintain. In addition, it can also be applied to hypersonic cruise missiles, hypersonic ai...

Claims

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Application Information

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IPC IPC(8): F23R3/28F23R3/02F02K7/10
Inventor 张泰昌袁涛范学军
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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