Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE credits
This thesis examines the possibility of creation of a robust sizing tool for centrifugal compressor. The sizing tool will be based on a 1D-analysis, a very quick and reliable way to design a centrifugal compressor. The aim of the sizing method is to have the best possible efficiency.
This study is based on the available literature on turbomachinery. With that scientific content, the development of the sizing tool has been attempted in two manners.
The first was based on publications on centrifugal compressors. The methodology was to implement scientific content on centrifugal compressors into a simple and intuitive sizing method, with the minimum input parameters.
The second implemented method was based on publications dedicated to radial turbines. It was based on the observation that radial turbines look very similar to centrifugal compressors. As the literature on radial turbines is much more developed than literature on centrifugal compressors, the attempt was made to transform radial turbine sizing methods into centrifugal compressors sizing method.
After having read publications and having implemented the content into several sizing methods, the third part of the thesis is the analysis of the results. All results from turbine-based methods have been compared to each other in order to determine if they were relevant. The next step was to compared compressor-based method to turbine-based method. This highlighted the fact that a turbine method has results similar to the compressor-based method, which prove that this attempt was not senseless.
Results from all methods have been compared to usual ratios to determine if they were adequate. Unfortunately some figures seem false and they will need a further investigation.
Unfortunately there are some inconsistencies in the resutls of the different assessed methods that may need further investigation.
After having solved the few problems that remains, the 1D-design of the compressor will be completed and it will be a good starting point for the 3D-analysis, last step of the compressor design. The use of a 1D-analysis to design primarily the compressor is a very smart way of doing compared to the time-consuming 3D-analysis.
2015. , 51 p.