Professor of Mechanical Engineering and Smart Structures, School of Computing Engineering and Mathematics, Western Sydney University, Australia. His research interests cover Industry 4.0, Additive Manufacturing, Advanced Engineering Materials and Structures (Metals and Composites), Multi-scale Modelling of Materials and Structures, Metal Forming and Metal Surface Treatment.
Abstract— Automotive turbocharger applications are built on the basis of radial flow or axial flow in order to extract energy. The ever growing demands for the enhanced fuel efficiency and low cost of fuel used in passenger cars, part load and low-end performance are the crucial areas. These areas should be focused more while designing the automotive turbocharger applications and turbines. A turbine that can mine more energy at less rotational speed and greater pressure ratios is considered more efficient in context of automotive drive phase. Reviewing various studies, it has been found that efficiency of radial flow lies at 0.7 speed ratios, but in the meantime, the less rotational speeds and greater pressure ratios lead towards the low blade speed ratio. Focusing on such findings, mixed flow turbines are considered a best option that offers significant benefits for the automotive turbocharger applications. In order to prove this consideration, the presented research was based on experimental valuation of blade speed ratio and efficiency of mixed flow turbines. For this purpose, semi-unsteady approach was used in addition to providing with the evidences of advantages of mixed flow behavior in turbocharger applications.
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