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Design, Optimization and Numerical and Experimental Investigation of the Impeller of a Centrifugal Compressor under Geometric Constraints
, Ph.D. Dissertation Sharif University of Technology ; Hajilouy Benisi, Ali (Supervisor) ; Durali, Mohammad (Supervisor)
Abstract
Centrifugal compressors are vastly implemented in the industry due to their higher pressure ratio per stage. So, researches are still going on to improve the performance of these devices. On this way, the current project is defined to perform geometrical optimization in the impeller of a centrifugal compressor using numerical and experimental methods. In this research, the design process of centrifugal compressors is first discussed according to methods and guidelines provided in several references. Then the compressor of the GT4082 turbocharger is redesigned using these theories. It is shown that overall available rules are enough to design an acceptable centrifugal compressor. Experimental...
Multilevel optimization of the splitter blade profile in the impeller of a centrifugal compressor
, Article Scientia Iranica ; Volume 24, Issue 2 , 2017 , Pages 707-714 ; 10263098 (ISSN) ; Hajilouy Benisi, A ; Durali, M ; Sharif University of Technology
Sharif University of Technology
2017
Abstract
In this research, multi-level optimization of the profile of the splitter blades of a turbocharger compressor is performed using genetic algorithm in order to improve its performance. Successive corrections of the profile at hub, mid-span, and shroud of the splitter blades, with the objective of decreasing the incidence losses at the leading edge and adjustment of the blade loading at the shroud, result in an impeller having improved splitter blades. The impeller flow field analysis shows that the optimization has been successful in reducing the flow leakage at the shroud region as well as the losses in the leading edge region. Although numerical simulations predict a decrease by 0.5% in...
Effect of splitter leading edge location on performance of an automotive turbocharger compressor
, Article Energy ; Volume 123 , 2017 , Pages 511-520 ; 03605442 (ISSN) ; Hajilouy Benisi, A ; Durali, M ; Sharif University of Technology
Elsevier Ltd
2017
Abstract
Design of centrifugal compressors can be accomplished using methods provided in text books and open literature. In this general approach, after determination of dimensions in meridional plane, blade profiles are designed using aerodynamic methods. Then, some blades are trimmed at the beginning to avoid inlet blockage. But there is no clear guidance on how this trimming must be performed. With this widely implemented method, splitter blades have the same profile as main ones. In this research, blade profiles and dimensions of the compressor impeller are not changed while the effect of changes in the position and angle of splitters leading edge are investigated. An optimization scheme is...