Modularized single-double throat switching type steam generating device

Abstract

The invention provides a modularized single-double throat switching type steam generation device which solves the problems that an existing steam generation mode is complex in system and high in cost, the steam pressure cannot meet the requirement, or ignition reliability is low, and explosion is caused under the extreme condition. The device comprises a head, a combustion chamber, a first throat and an outlet chamber which are sequentially connected. The head comprises a head shell, a supporting pipe, an alcohol nozzle center body and a swirler, the head shell comprises a sleeve and an end cover, and an air inlet is formed in the sleeve; the front end of the supporting pipe is arranged on the end cover and provided with an alcohol inlet, and the rear end of the supporting pipe extends into the combustion chamber and is an inner conical opening. The alcohol nozzle center body penetrates through the supporting pipe, the front end of the alcohol nozzle center body extends out of the supporting pipe and can axially move along the supporting pipe, and the rear end of the alcohol nozzle center body is provided with a conical boss matched with the inner conical opening; the swirler is sleeved at the rear end of the supporting pipe; a plurality of air holes are formed in the combustion chamber; and a first cooling medium cavity and a first medium inlet in the first throat are used for cooling fuel gas generated by the combustion chamber.

Description

technical field [0001] The invention belongs to the field of direct connection test of ramjet, and in particular relates to a modularized single-dual-throat switching steam generating device for air, alcohol and water combustion, which is used for a ramjet ground test ejection system. Background technique [0002] The ramjet engine in flight draws air from the atmosphere as the working medium. Its internal and external flow conditions are determined by the atmospheric parameters of a certain flight altitude: static pressure, static temperature and flight speed. Its independent parameters are total pressure, total temperature and Flight Mach number. [0003] The flight trajectory point parameters of the engine determine the pressure parameters in the atmospheric environment. During the ground test, it is necessary to simulate the exhaust backpressure at the nozzle outlet of the engine. Usually, the engine is placed in a vacuum chamber, and the ejector is used to generate a v...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing steam generation method, or the system is complex, the cost is high, the steam pressure cannot meet the requirements, or the use of cryogenic liquid oxygen working fluid brings flammable and explosive risks, low ignition reliability, and explosion in extreme cases To solve the technical problem, the present invention provides a modularized single- and double-throat switchable steam generation device, which can generate steam with a certain pressure, temperature and flow rate

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