Microminiature Swiss roll combustor suitable for non-premixed combustion

Abstract

The invention belongs to the technical field of gas diffusion combustion and particularly discloses a microminiature Swiss roll combustor suitable for non-premixed combustion. The microminiature Swissroll combustor comprises a combustor body and an upper cover plate arranged on a base plate. The combustor body comprises a first combustion chamber, a second combustion chamber, a first exhaust channel, a second exhaust channel, a fuel channel and an oxidizing agent channel. Inlets of the first combustion chamber and the second combustion chamber are symmetrically distributed in the upper side and the lower side of the center of the combustor, and outlets of the first combustion chamber and the second combustion chamber are connected with the first exhaust channel and the second exhaust channel correspondingly. Outlets of the fuel channel and the oxidizing agent channel are symmetrically distributed on the left side and the right side of the center of the combustor and communicate in thecenter of the combustor, and the fuel channel, the first exhaust channel, the oxidizing agent channel and the second exhaust channel are each in a spiral shape and are arranged at intervals. The microminiature Swiss roll combustor has the advantages that the mixing effect is good, the stable combustion range is large, the combustion efficiency is high, and the energy utilizing rate is high, can be suitable for various microminiature thermophotovoltaic systems and thermoelectric systems based on combustion, and can also be directly used as a hot resource.

Description

technical field [0001] The invention belongs to the technical field of gas diffusion combustion, specifically a miniature swiss roll burner suitable for non-premixed combustion, especially suitable for various miniature thermal photovoltaic systems and thermoelectric systems based on combustion, and can also be used directly as a heat source . Background technique [0002] With the rapid development of MEMS technology, many micro-miniature devices and systems have emerged, such as micro-miniature electronic equipment such as micro-satellites, micro-robots, and micro-propulsion systems. At present, the energy sources of these devices are mainly chemical batteries, but the energy density of chemical batteries is relatively low, and the volume and weight are also relatively large. Carbon hydrocarbon fuels have an energy density advantage that is several tens of times higher than that of chemical batteries. For example, the energy density of typical liquid hydrocarbon fuels is ...

AI Technical Summary

Problems solved by technology

But this will bring a new problem, that is, the uneven mixing of fuel and oxidant will lead to insufficient reaction, low combustion efficiency and unstable flame.

The existing non-premixed burner structural design generally adopts simple parallel intake channels or Y-shaped intake channels, for example, Ju et al. (Xu B, Ju Y. Studies on non-premixed flame streets in a mesoscale channel. Proceedings of the Combustion Institute, 2009, 32 (1): 1375-1382) and Miesse et al. 30(2):2499-2507) adopted these two methods respectively, and they found the so-called "flame street" in the experiment, that is, the phenomenon of discrete distribution of multiple small flames along the entrance to the exit of the combustion chamber. Obviously, This is caused by insufficient mixing of fuel and oxidant; in addition, micro-diffusion burners, like premixed combustion, face the problem of a large proportion of heat loss

The reasons for the above aspects make it very difficult to realize non-premixed combustion at the micro scale, and there have not been many application examples

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