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A method and device for diagnosing the combustion process and details of the ignition and combustion of metal particles

A technology of combustion process and metal particles, which is applied in the direction of measuring devices, chemical analysis by combustion, engine testing, etc., to achieve the effect of promoting and inhibiting condensed phase deposition in research

Active Publication Date: 2021-09-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

In rocket engine combustion chambers, the gas and particle flow velocity is often high (10~60m / s), and the particle size is small (1~200μm). The ignition and combustion process of metal particles is often coupled with flow, chemical reaction, heat and mass transfer. process, and there are gas phase and surface reactions, with greater complexity

Method used

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  • A method and device for diagnosing the combustion process and details of the ignition and combustion of metal particles
  • A method and device for diagnosing the combustion process and details of the ignition and combustion of metal particles
  • A method and device for diagnosing the combustion process and details of the ignition and combustion of metal particles

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as figure 1 and 2 As shown, a diagnostic device for the combustion process and details of metal particles flowing with the flow, including a solid gas generator 1, a gas channel 2 and a window observation section 3 connected in sequence in the axial direction, the gas channel 2 is a shell The enclosed cavity is provided with a plurality of longitudinal powder ejectors 9 at intervals along its length on the lower shell of the gas passage 2, and the plurality of powder ejectors 9 do not work at the same time, and are used for Inject the metal powder into the gas channel 2. The particles injected by the powder catapult 9 at different positions will be in different ignition and combustion stages when they reach the observation window, and the high-speed camera 5 collects information such as the flow state and flame structure of the ...

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Abstract

The invention discloses a method and device for diagnosing the ignition and combustion process and details of metal particles with flow. On the lower casing of the gas passage, and outside it, there are a plurality of longitudinal powder ejectors arranged at intervals along its length. The plurality of powder ejectors do not work at the same time, and are all used to spray metal powder Inject into the gas channel. The device can effectively suppress the condensed phase deposition in the observation window, and realize the capture and diagnosis of the flame structure and combustion details of the metal particles following the flow of ignition, combustion, and flameout.

Description

【Technical field】 [0001] The invention belongs to the technical field of metal particle combustion, and in particular relates to a method and device for diagnosing the ignition combustion process and details of metal particles with flow. 【Background technique】 [0002] Metal particles have high volumetric energy density and excellent ignition and combustion properties. They are ideal energy additives and are widely used in aerospace propulsion fields such as solid rocket motors and powder rocket motors. In rocket engine combustion chambers, the gas and particle flow velocity is often high (10~60m / s), and the particle size is small (1~200μm). The ignition and combustion process of metal particles is often coupled with flow, chemical reaction, heat and mass transfer. process, and there are gas phase and surface reactions, which have great complexity. Compared with the static condition, there is an essential difference in the heat and mass transfer between particles and gas, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/12G01N21/84G01M15/14G01M15/02
CPCG01M15/02G01M15/14G01N21/84G01N31/12G01N2021/8411
Inventor 李悦胡加明武冠杰李孟哲刘世宁胡春波陈剑魏祥庚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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