Turbocharger aerodynamic design

The aerodynamic design of turbochargers is described, covering radial compr essors and turbines and also axial turbines. The paper concentrates upon th ose aspects that are peculiar to turbocharger design, including the approac h adopted, and highlights the importance of company-specific empirical data . Turbochargers have to be physically adaptable to suit many different size s of engine, with a great variety of operating duties. The need for turboch argers to achieve the highest obtainable performance at the lowest cost whi le maintaining durability levels comparable with the engine contributes to the design challenges that are discussed.