Micro engine combustion chamber evaporation pipe with inlet rotational flow blades

Abstract

The invention discloses a micro engine combustion chamber evaporation pipe with inlet rotational flow blades. The rotational flow blades are arranged on an inlet of the evaporation pipe, when air enters the evaporation pipe, under the rotation effect of the inlet rotational flow blades, rotational flows with the axial direction, radial direction and tangent speed dividing are generated, due to thehigh turbulence level and the shear effect of the rotational air flow, fresh air and fuel oil can be mixed more sufficiently, due to axial speed reduction, the staying time of the air flow and the fuel oil in the evaporation pipe is prolonged, fuel oil and air mixing is facilitated. On the other hand, the rotational air flow in the evaporation pipe increases the convection heat exchange coefficient, heat exchange between the wall face and the air flow can be enhanced, the fuel oil atomization evaporation effect is reinforced, and combustion is more sufficient. The higher rotational flow strength is kept in the evaporation pipe, the rotational flow blades are arranged in the evaporation pipe, and the staying time and the mixing degree of the fuel oil in the evaporation pipe can be furtherimproved.

Description

technical field [0001] The invention belongs to the field of micro-engine combustion chambers, and in particular relates to a micro-engine combustion chamber evaporation tube with inlet swirl blades. Background technique [0002] With its outstanding features such as small size, good concealment, light weight, low cost, easy to carry, and simple operation, micro-aircraft has shown very attractive application prospects in both military and civilian fields. new requirements. Since the concept of micro power system was put forward, micro engine has become a research hotspot at home and abroad, among which micro turbine engine is one of the most promising powers, which has the advantages of small size, light weight, large output energy and high density. [0003] The combustion chamber is the heart of the engine, and the development of a micro-engine cannot be separated from the development of a micro-combustion chamber. The design of the micro-engine combustion chamber directl...

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Problems solved by technology

But at the same time, the atomization and evaporation effect of the evaporator tube is relatively poor, especially when the air pressure is low and the temperature is not high at the start state, the fuel in the evaporator tube cannot be well atomized, which makes it difficult to ignite the engine, so a reasonable design The structure of the evaporation tube is of great help to improve the performance of the combustion chamber, and has very important research significance

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