Minitype compressor heat insulation type stator wheel disk

Abstract

The invention relates to a heat-insulated stator wheel disk for mini-type compressor, which is characterized in that the back part of the stator wheel disk for compressor adopts double-layer heat insulating structure. The miniaturized engine has remarkably improved heat transfer effect and remarkably reduced performance, so that effective heat insulating measures have to be adopted. The back part of the stator wheel disk for compressor is the main heated part, thereby adopting double-layer heat insulating structure to reduce temperature rising at the outlet port of the compressor due to heat transfer and improve the performance of the engine. The outer heat insulating layer uses metal film to reflect heat radiation energy from a combustion chamber; and the main heat insulating layer uses ceramic fiber material to stop the transfer of outer heat to the stator wheel disk for compressor. The double layer heat insulating structure remarkably improves the performance of engine without changing the structure of engine. The heat-insulated stator wheel disk has the advantages of simple structure, easy operation and good heat insulating effect. The invention remarkably improves the performance of complete machine of the compressor and engine under the prerequisite of assuring the aerodynamic performance of engine and not changing the structure of engine.

Description

technical field [0001] The invention relates to a micro-compressor heat-insulated stator disc for reducing the heat transfer from a combustion chamber to a compressor so as to improve the performance of the compressor. The utility model belongs to the technical field of micro-compressor design. Background technique [0002] The Micro Turbine Engine (MTE) is light in weight, high in power, and high in energy density. It can be used as a propulsion system for various micro-missiles, unmanned aerial vehicles, and even future individual aircraft. It is a new jet propulsion power with good application prospects. device. At present, practical models have been developed both at home and abroad, and they have been put into practical use abroad. Microturbine engine (MTE) can also be used in power generation devices, such as combining with fuel cells to form a distributed power system with high energy density, which has the advantages of high thermal efficiency and low pollutant emi...

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Problems solved by technology

At present, most studies focusing on the design specificity of micro-turbine engines (MTE) focus on the first aspect (such as micro-compressors (Borislav Sirakov, Yifang Gong, Alan Epstein, Choon Tan. Design and Characterization of Micro-compressor Impellers. Vienna, Austria: Proceedings of ASME Turbo Expo, GT2004-53332, 2004), turbine (Zhengping FENG, Qinghua DENG, Jun LI. Aerothermodynamic Design and Numerical Simulation of Radial Intlow Turbine Impeller for A 100kW Microturbine. Nevade, USA: Proceedings of ASME Turbo Expo, 26GT20765, 26GT20765 ), micro-scale flow (Fan Jing, Shen Qing. Micro-scale gas flow. Progress in Mechanics, 2002, vol.32(3)), micro-annular combustors, etc. Cao Hailiang, Xu Jinliang. Combustion characteristics of micro-scale annular combustors .Natural Science Advances, 2006, vol.16(7)), however, there are not many studies on the interaction and matching of components in the whole machine environment

The latest research at home and abroad has revealed that high-temperature components close to the compressor will transfer a large amount of heat to the compressor, which can significantly affect the cycle conditions and significantly reduce efficiency (such as D.Bohn from Aachen University in Germany et al. A study carried out on a single-stage compressor, calculated by CFD (D.Bohn, T.Heuer, and K.Kusterer. ConjugateFlow and Heat Tranfer Investigation of A TurboCharger: Part I: Numerical Results. In Proceedings of ASME Turbo Expo 2003 Powerfor Land, Sea , and Air, Atlanta, Georgia, USA, 2003) and experimental measurements (D.Bohn, N.Moritz, and M.Wolff, Conjugate Flow and Heat Tranfer Investigation of ATurboCharger: Part II-Experimental Results.In Proceedings of ASME TurboExpo2003 Power for Land, Sea, and Air, Atlanta, Georgia, USA, 2003) showed that the heat transfer from the high-temperature turbine to the compressor will significantly affect the cycle conditions and significantly reduce the efficiency)

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