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Assessment of converting approach to efficient design of micro-turboprop engines

Chinese Journal of Aeronautics 2020年第2期33卷 572-588页

作者： Hamed GOLCHIN Fathollah OMMI Zoheir SABOOHI Department of Mechanical Engineering Tarbiat Modares UniversityTehran 14115-111Iran Aerospace Research Institute(ARI) Ministry of ScienceResearchand TechnologyTehran 14115-111Iran

The design,manufacture and experiment of a shaft power unit for converting a microturbojet engine to a micro-turboprop in the class of less than 20 kW with the aim of obtaining maximum shaft power were described in this *** this purpose,a Wren 100 micro-turbojet engine was used as the gas generator,and the specifications of its outflow were *** optimal configuration of the inter-stage diffuser,which was an annular S-type diffuser,was selected based on its small total pressure drop and outlet flow *** power turbine was a single stage axial turbine that was designed based on the fixed nozzle angle assumption without any taper or twist in its *** turbine rotor was a bladed disk(Blisk)in which its unique blade profiles were designed based on the Wilson ***,the shaft power unit was completed by designing and manufacturing an exhaust complex and ***,the micro-turboprop engine was tested with an overloading *** results show a significant increase in the extracted power,an acceptable efficiency of the power turbine,and a significant reduction in the Specific Fuel Consumption(SFC)compared to other engines that use similar gas generators.

关键词： Axial turbine Blisk Gas generators micro-turboprop Power unit

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