Micro-combustor for enhancing flame stability through gas preheating

Abstract

The invention discloses a micro-combustor for enhancing flame stability through gas preheating. The micro-combustor comprises two primary combustion chambers and a secondary combustion chamber arranged between the two primary combustion chambers, and a gas inlet channel is further arranged between each of the two primary combustion chambers and the secondary combustion chamber; gas enters the gasinlet channels, and then enters the primary combustion chambers after being preheated sequentially by tail gas and main combustion gas; primary flame stabilizing blunt bodies are arranged at the parts, communicating with the gas inlet channels, of the primary combustion chambers; and high-temperature tail gas generated by combustion in the primary combustion chambers enters the secondary combustion chamber, a secondary flame stabilizing blunt body is arranged at the part, communicating with the two primary combustion chambers, of the secondary combustion chamber, and the high-temperature tailgas generated by continuous combustion in the secondary combustion chamber is discharged as a heat source. According to the micro-combustor, combusting preheating is carried out so that the energy needed by ignition can be reduced, the ignition delay time can be shortened and the exhaust heat loss can be reduced; and meanwhile, the two stages of combustion chambers are arranged so that the ignition quenching limit can be improved, and the inlet speed can be increased.

Description

technical field [0001] The invention belongs to the technical field of micro-scale power generation, and more specifically relates to a micro burner for gas preheating and enhanced flame stability. Background technique [0002] With the development of micro-electro-mechanical systems (MEMS) and the introduction of a variety of miniaturized military equipment concepts, the development of micro-energy systems with small volume, light weight, high energy density, and continuous operation has become the focus of attention of various countries. In particular, in recent years, micro power systems have attracted more and more attention from researchers at home and abroad due to their advantages such as high energy density, long working life, easy maintenance and low pollution. This type of device can convert the chemical energy of hydrocarbon fuels into heat energy through combustion, and rely on various energy conversion methods to provide power or electricity for micro-electromec...

AI Technical Summary

Problems solved by technology

Due to the miniaturization of devices, the micro-combustors developed in recent years generally face the following problems: the combustion is unstable or even impossible to ignite in the microstructure size, and the extremely short residence time of fuel and oxidant in the reactor leads to low combustion efficiency , high specific surface area causes severe heat loss, etc.

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