A double-cavity liquid film miniature liquid burner and its combustion method

Abstract

The invention discloses a double-cavity liquid film miniature liquid combustor and a combustion method thereof. A combustion barrel is composed of an inner barrel and an outer barrel, a plurality of primary ventilation holes are formed in the inner barrel in the circumferential direction at intervals, a gap between the lower end of the inner barrel and a lower end cover serves as a secondary ventilation opening, and a grid is arranged above the primary ventilation holes. Air entering from an air inlet tube drives liquid fuel coming from a fuel inlet to enter a gap between the outer wall of the inner barrel and the inner wall of the outer barrel in a rotational flow mode, so that a liquid film is formed by the liquid fuel and attached to the outer wall of the inner barrel, the liquid film on the outer wall of the inner barrel evaporates constantly as the air flows, mixed gas is formed by the liquid film and the air, one part of the mixed gas enters the inner barrel through the primary ventilation holes, and the other part of the mixed gas enters the inner barrel through the secondary ventilation opening of a lower port of the inner barrel from bottom to top. The combustor solves the technical problems that as for an existing miniature combustor, fuel is combusted insufficiently and unstably, flames are prone to extinguishing and combustion efficiency is low.

Description

technical field [0001] The invention relates to a burner, in particular to a double-chamber liquid film miniature liquid burner and a combustion method thereof. Background technique [0002] With the rapid development and use of micro-devices, whether it is micro-robots in industry, micro-drones, micro-rockets and other equipment in the military, or the popularity of various micro-devices in civilian use, including mobile phones, tablets and other devices. Judging from the development trend of technology, the miniaturization of equipment will have a huge development prospect. At present, the mainstream micro functional devices are mainly lithium batteries, but they have the disadvantage of low energy density (about 1.2KJ / Kg). In comparison, the energy density of a typical liquid hydrocarbon fuel is about 45MJ / Kg, because if an efficient, stable, and safe micro-combustor can be developed, its application prospects will be very broad. [0003] However, compared with traditio...

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Problems solved by technology

Solve the technical problems of existing burners such as insufficient combustion, instability, easy flame quenching, and low combustion efficiency

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