Micro diffuse type combustion apparatus for micro-thermphotoelectric system

Abstract

The invention provides a micro diffuse type combustion apparatus for a micro-thermphotoelectric system. The micro diffuse type combustion apparatus for the micro-thermphotoelectric system comprises an ignition device, an external sleeve, an internal sleeve and an upper panel, wherein the internal sleeve is positioned in the external sleeve; the upper panel is arranged at the top end of the external sleeve; the internal sleeve is a flared structure with big lower end; the lower end of the internal sleeve is provided with a porous bottom plate; the circumferential wall of the lower part of the internal sleeve; the interior of the internal sleeve is a preheating premixing chamber; a combustion chamber is formed between the internal sleeve and the external sleeve; the preheating premixing chamber is communicated with the combustion chamber through a porous wall and the porous bottom plate; and a gas exhaust opening, an air inlet and a fuel gas inlet are formed in the upper panel. According to the invention, as air enters the porous material from various surfaces, a temperature field is uniform and the combustion is enhanced to increase the device power; through the adoption of special combustion chamber wall surface design, heat obtained by the whole wall surface is much and uniform; the micro diffuse type combustion apparatus can stably respond to fine air inlet pulsation and combustion pulsation; and meanwhile, through the adoption of the porous material with reducing aperture, tempering and backflow problems of the porous material are also avoided.

Description

technical field [0001] The invention relates to a micro-combustor suitable for a micro-thermo-photoelectric system and a micro-thermo-electric system, in particular to a micro-diffused combustion device for a micro-thermo-photoelectric system with a preheating and premixing chamber and a combustion chamber expanding gradually at the same time. Background technique [0002] Micro-scale combustion is proposed with the development of MEMS (micro-electromechanical system) technology, and its combustion is usually below 1cm 3 occurs within the volume. The power generation principle of micro-scale combustion is: micro-scale burners produce high-temperature flue gas to drive heat engines to generate power, or obtain electricity through direct conversion of thermoelectric materials and generate electricity through photoelectric materials. The application fields involve micro-aircraft, micro-satellite propulsion systems, and military individual combat. And many other aspects. Compa...

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Problems solved by technology

[0003] In view of the deficiencies in the above existing technologies, such as the low and uneven wall temperature of the micro-combustor in the micro-thermal photoelectric system, the large space occupied by the intake air premix, the premix preheating effect is poor and the intake air temperature is low, and the intake air area small, the residence time of the gas in the device is short, and the heat exchange effect between the flue gas and the wall surface is poor.

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