Miniature jet engine compressor design and optimization

With the proliferation of unmanned aerial vehicles (UAVs) in today’s modern battlefield, the key to enhancing their range is to design a high performance mini-jet engine. One of the key components of the mini-jet engine is the centrifugal compressor. In this study, a design strategy for two centrifu...

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Main Author: Goh, Aik Tio.
Other Authors: School of Mechanical and Aerospace Engineering
Format: Final Year Project
Language:English
Published: 2012
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Online Access:http://hdl.handle.net/10356/49533
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-495332023-03-04T18:43:28Z Miniature jet engine compressor design and optimization Goh, Aik Tio. School of Mechanical and Aerospace Engineering Fei Duan DRNTU::Engineering With the proliferation of unmanned aerial vehicles (UAVs) in today’s modern battlefield, the key to enhancing their range is to design a high performance mini-jet engine. One of the key components of the mini-jet engine is the centrifugal compressor. In this study, a design strategy for two centrifugal compressors suitable for use in the SR-30 mini-jet engine was developed. The meanline software, Compal, was used to generate an initial design. Optimization of the meanline models was performed. After which, the models was transferred to the numerical simulation software Axcent where modifications were made to the three-dimensional geometry before conducting the full three-dimensional computational fluid dynamics (CFD) simulations. The first design was accomplished using the design of experiments (DOE) technique. The parametric studies conducted provided the necessary understanding of the influence of the design variables on the compressor stage performance. In particular, the decrease in the inlet hub radius and the backsweep angle were found to have significant positive impacts on the stage pressure ratio. On the other hand, an increase in the backsweep angle increased the compressor efficiency. For the second design of the compressor, the feasibility of an automated optimization search technique was investigated. The optimization software TurboOpt II and IOSO NM were used. Both optimizations were carried out in the meanline software to reduce the time taken in the design cycle. At the design point of 80,000 rpm and 0.3 kg/s mass flow rate, the first design achieved 11.2 % increase in the pressure ratio and 8.2 % increase in the efficiency. The second design achieved similar increase in the pressure ratio and 10.9 % increase in the efficiency. Deeper analysis of the CFD results revealed that the second compressor exhibits more desirable flow characteristics at the inducer and diffuser. Further improvements to the stage performance appear to be achievable by using IOSO to optimize the meridional and blade angle distributions of the impeller to produce a more uniform outlet flow. The detailed stress and modal analysis is suggested to be performed in future. Bachelor of Engineering (Aerospace Engineering) 2012-05-21T07:54:20Z 2012-05-21T07:54:20Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/49533 en Nanyang Technological University 116 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Goh, Aik Tio.
Miniature jet engine compressor design and optimization
description With the proliferation of unmanned aerial vehicles (UAVs) in today’s modern battlefield, the key to enhancing their range is to design a high performance mini-jet engine. One of the key components of the mini-jet engine is the centrifugal compressor. In this study, a design strategy for two centrifugal compressors suitable for use in the SR-30 mini-jet engine was developed. The meanline software, Compal, was used to generate an initial design. Optimization of the meanline models was performed. After which, the models was transferred to the numerical simulation software Axcent where modifications were made to the three-dimensional geometry before conducting the full three-dimensional computational fluid dynamics (CFD) simulations. The first design was accomplished using the design of experiments (DOE) technique. The parametric studies conducted provided the necessary understanding of the influence of the design variables on the compressor stage performance. In particular, the decrease in the inlet hub radius and the backsweep angle were found to have significant positive impacts on the stage pressure ratio. On the other hand, an increase in the backsweep angle increased the compressor efficiency. For the second design of the compressor, the feasibility of an automated optimization search technique was investigated. The optimization software TurboOpt II and IOSO NM were used. Both optimizations were carried out in the meanline software to reduce the time taken in the design cycle. At the design point of 80,000 rpm and 0.3 kg/s mass flow rate, the first design achieved 11.2 % increase in the pressure ratio and 8.2 % increase in the efficiency. The second design achieved similar increase in the pressure ratio and 10.9 % increase in the efficiency. Deeper analysis of the CFD results revealed that the second compressor exhibits more desirable flow characteristics at the inducer and diffuser. Further improvements to the stage performance appear to be achievable by using IOSO to optimize the meridional and blade angle distributions of the impeller to produce a more uniform outlet flow. The detailed stress and modal analysis is suggested to be performed in future.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Goh, Aik Tio.
format Final Year Project
author Goh, Aik Tio.
author_sort Goh, Aik Tio.
title Miniature jet engine compressor design and optimization
title_short Miniature jet engine compressor design and optimization
title_full Miniature jet engine compressor design and optimization
title_fullStr Miniature jet engine compressor design and optimization
title_full_unstemmed Miniature jet engine compressor design and optimization
title_sort miniature jet engine compressor design and optimization
publishDate 2012
url http://hdl.handle.net/10356/49533
_version_ 1759858322490523648