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Noman Danish, S., Chaochen, M. and Ce, Y. (2006) The Influence of Tip Clearance on Centrifugal Compressor Stage of a Turbocharger. Proceedings of the 4th WSEAS International Conference on Fluid Mechanics and Aerodynamics, Elounda, 21-23 August 2006, 6-11.

has been cited by the following article:

  • TITLE: Design of a Centrifugal Compressor for Micro Gas Turbine: Investigation of Scaling and Tip Clearance Effects

    AUTHORS: Dario Barsi, Alberto Bottino, Andrea Perrone, Luca Ratto, Pietro Zunino

    KEYWORDS: Centrifugal Compressor, Scaling, Tip Gap, CFD

    JOURNAL NAME: Open Journal of Fluid Dynamics, Vol.9 No.1, February 21, 2019

    ABSTRACT: The aim of this paper is to investigate the design in similarity of a centrifugal compressor for micro gas turbine and the related scaling effects on performance using CFD investigations. This work is part of a research project carried out by the Department DIME of the University of Genova, with the purpose of investigating the performance of a micro gas turbine in the change from 100 kW electrical output to 250 kW, while maintaining the compressor pressure ratio and geometry in similarity. The first part of the work focuses on the comparison between the original and the scaled machine, while the second part of the study deeply investigates the tip gap effect in the new configuration. The aim is to provide information about the performance of the compressor designed in geometrical similarity and to evaluate the tip gap height impact. From the efficiency point of view, the scaled-up machine has higher efficiency (up to 1.4% increment in design conditions) keeping the same technological limit for impeller manufacturing. However, the variation of tip gap height in the range 0 ÷ 1 mm strongly affects this parameter, leading to 10% alteration in design conditions between the ideal and worst case. The results, both in terms of overall performance and flow fields, are widely discussed in order to obtain simple yet reliable correlation for preliminary design.