Oxyhydrogen combustion chamber dynamic characteristic rapid prediction method

A prediction method and technology of dynamic characteristics, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as complex modeling, achieve the effects of improving prediction efficiency, facilitating implementation, and avoiding modeling calculations

Inactive Publication Date: 2016-06-08
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0005] In order to overcome the disadvantages of complex modeling and difficult programming in the existing methods, the present invention provides a rapid prediction method for the dynamic characteristics of the hydrogen-oxygen combustor, which uses a set of ordinary differential equations to describe the variation of each parameter of the hydrogen-oxygen combustor with time , which facilitates the realization of the hydrogen-oxygen combustion control algorithm; the invention has fast operation speed, simplicity and reliability, and improves the prediction efficiency of the dynamic performance of the hydrogen-oxygen combustion chamber

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  • Oxyhydrogen combustion chamber dynamic characteristic rapid prediction method
  • Oxyhydrogen combustion chamber dynamic characteristic rapid prediction method
  • Oxyhydrogen combustion chamber dynamic characteristic rapid prediction method

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[0046] The modeling simulation of this implementation case is mainly used to verify the correctness, simplicity and rapidity of the method of the present invention in the prediction of the dynamic performance of the hydrogen-oxygen combustor, and to construct a hydrogen-oxygen combustor that can be used for underwater propulsion, and its working principle can be simply expressed is: unit time into the combustion chamber hydrogen and Oxygen combustion releases heat dQ fy ; Unit time injected by the nozzle Cooling water in convective heat transfer dQ d1 Evaporated mass dm under action zf , which and superheated steam with humidified hydrogen Spiral pipe outlet superheated steam together in dQ fy and dQ d1 Engine working fluid consumption dm under action o .

[0047] Step 1: Calculate the variation law of the gas phase parameters in the combustion chamber

[0048] According to the working mechanism of the combustion chamber, the gas continuity equation in the combu...

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Abstract

The invention discloses an oxyhydrogen combustion chamber dynamic characteristic rapid prediction method comprising the following steps: respectively calculating mass flow of compressible and incompressible fluid flowing in / out a combustion chamber according to a jet pipe principle and a nozzle maximum flow principle; using a law of conservation of mass and law of conservation of energy to obtain an equation satisfying indoor gas-liquid phase quality and temperature changes; using a liquid drop group evaporation model to consider gas-liquid phase alternate effect, thus fast predicting oxyhydrogen combustion chamber dynamic characteristics. The method uses a system of ordinary differential equations to describe the changing rules of the oxyhydrogen combustion dynamic characteristics along time, can prevent partial differential equation group complex modeling calculation, and thus realizing oxyhydrogen combustion control algorithm; the novel method is simple and reliable, and suitable for applications in engineering practices.

Description

technical field [0001] The invention belongs to the field of engineering thermodynamics, and in particular relates to the rapid prediction of the dynamic characteristics of an underwater gas-hydrogen-oxygen combustion chamber. Background technique [0002] Hydrogen-oxygen energy has the characteristics of simple chemical reaction process, good combustion stability, large theoretical specific impulse, and no pollution, and has been widely used in space propulsion systems. The research on hydrogen and oxygen energy used in space propulsion system mainly focuses on catalytic ignition, experimental research and numerical simulation. Hydrogen-oxygen catalytic ignition mainly studies the effects of catalytic medium, catalyst area-to-volume ratio, catalytic ignition structure, hydrogen-oxygen mixing ratio, and supply pressure on catalytic ignition time and ignition reliability, and proposes temperature resistance and water resistance of catalytic components. Require. The hydrogen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 张振山张方方梁伟阁谭思炜
Owner NAVAL UNIV OF ENG PLA
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