1. Flow inside the Volute
In small radial turbines, the assembly commonly referred to as
the “volute” accounts for approximately half of the energy loss, regardless
of thermal losses. It is therefore necessary to be able to analyse
the power dissipated by the fluid in this poorly understood part of
the turbine. A kinematic study of the gas in the volute is essential
to determine, with an acceptable approximation, the velocity components.
For example, Euler’s theorem (§ 4.2 of [BM 4 570] ) shows that we
must know the velocity vector at the impeller inlet to determine the
theoretical power output...
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Flow inside the Volute