Introduction
Radial Supercharger Turbines - Basic Principles

In its typical use, that is, under steady-state conditions, it is convenient to define the concept of a turbomachine (Latin origin: turbo, turbinis: whirlwind, spinning top). It concerns a rotating device whose function is to facilitate the exchange of mechanical energy between an impeller, equipped with vanes (or blades) rotating at a constant speed on an axis, and a fluid in quasi-steady flow. The fluid is guided through a casing (also called the body) that connects to the inlet and outlet ports, located upstream and downstream of the casing, respectively.

A turbomachine can draw in and discharge a fluid within the same environment, but it is often positioned between two or more chambers containing the same fluid at different...