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Study on the Experiment of Micro-turbine-engine for Power MEMS

Author: LiaoZhaoBang
Tutor: GuoGang；ZhangLi
School: Chongqing University
Course: Mechanical Manufacturing and Automation
Keywords: Power MEMS Combustion of micro- space Prototype experiment Three ejector Gas Turbine
CLC: TM314
Type: Master's thesis
Year: 2009
Downloads: 184
Quote: 0
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Abstract

Micro-fuel generator is the power of a few watts to several hundred watts micro gas turbine (MGT), belonging to the MEMS micro-energy power systems. It has broad application prospects in the field of aerospace, communications, biomedical, defense and other. Abroad, the rise of micro-fuel generators from car turbines and aircraft auxiliary generator transformed from fully benefit from efficient regenerator, air bearings, high frequency inverters, motors and high efficiency and low fuel new material and technology . It is also much smaller than the traditional small gas turbine, the rapid rise as a flexible distribution of green power. This thesis is based on exploratory proposed a the Power MEMS gas turbine generator structure, the prototype trial and the conditions Experimental. FLUENT software to simulate the internal flow field, and comparative analysis of the test data. Finally, micro burner pipe, for example, to use the chemical kinetics the CHEMKIN of the micro-space hydroxide catalytic combustion characteristics. First, this article details the the Power MEMS gas turbine generator schematic design and structural design, three gas ejector compressor design comprehensive exposition of. An outer diameter of 8mm prototype in a high speed movement is smooth and the friction between the components is small, but there is to leak the larger phenomenon. Finally, the prototype of the problems raised a number of improvements, and the theoretical analysis and appraisal. Second, focusing on the miniaturization of the design of the test bench and dynamometer experiments described. The completed prototype characteristics test in four different conditions, compared inlet pressure, inlet flow into the temperature of the prototype power to enhance the degree of influence. Improvement program for the two structures and the corresponding three categories condition test, the experiment proved the eight leaf turbine has a better performance than the six-blade turbine the empty cup Coil conversion efficiency higher than that of the core coil. Again, the numerical simulation of catalytic combustion in the combustion chamber of the micro channel type H ₂ / O ₂ (catalyzed by platinum powder). Concerned about the reaction pressure, when the ratio of distribution and change of the combustion chamber temperature distribution and variation of each component in the combustion chamber, chemical reaction rate. The simulation results show that: in the burner of the micro-channels, the higher the reaction pressure is conducive to improve the combustion efficiency of micro-burner hydroxide, but too high a reaction pressure will limit the micro-burner combustion load; selecting the appropriate equivalence ratio ( 1 to 1.5) conducive to the micro burner hydroxide mixture was sufficiently combustion; catalytic combustion requires a minimum heat flux or temperature to complete the ignition. Finally, the the Power MEMS gas turbine generator prototype manufacturing process and application prospects. Obtained in the experimental prototype maximum air speed of 100000r/min load maximum speed up to 60000r/min, maximum output power of 2-3W.

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