Design and 1D Dynamic Modeling of an Axial-Centrifugal Compressor Matching

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Asghary, Maryam | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46896 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Ghorbanian, Kaveh
Abstract:
Overall performance improvement of gas turbine is available by modifying each component of cycle. The purpose of this research is to improve performance of a micro turbine with 200 KW power, by redesigning compressor set. Considerable increase in performance and stability occurs, by adding individual stage of axial compressor at the entry of centrifugal section. It should be noted that, this improvement occurs without a significant increase in size and without having to change the centrifugal compressor design.In this study, design of one stage axial compressor and three dimensional modeling is discussed after, modeling and preliminary design of centrifugal compressor. Then, after obtaining the performance map for both axial and centrifugal compressor, matching operation in various mass flow rate has been done to control stability. Finally, numerical modeling of designed compressor was performed and after comparing with pervious section, the design was approved. As a result, the axial-centrifugal compressor could increase pressure ratio, efficiency and turbine inlet temperature and thereby reduce specific fuel consumption
Keywords:
Microturbine ; Centrifugal Compressor ; Axial Compressor ; Axial Compressor Design ; Axial-centrifugal Compressor ; Matching Operation