- Prandtl-Meyer function
Prandtl-Meyer function describes the angle through which a flow can turn isentropically for the given initial and final
Mach number. It is the maximum angle through which a sonic (M = 1) flow can be turned around a convex corner. For an ideal gas, it is expressed as follows,
where, is the Prandtl-Meyer function, is the Mach number of the flow and is the ratio of the specific heat capacities.
By convention, the constant of integration is selected such that
As Mach number varies from 1 to , takes values from 0 to , where
where, is the absolute value of the angle through which the flow turns, is the flow Mach number and the suffixes "1" and "2" denote the initial and final conditions respectively.
Prandtl-Meyer expansion fan
* cite book
last = Liepmann | first = Hans W. | coauthors = Roshko, A.
title = Elements of Gasdynamics | origyear = 1957
Dover Publications| year = 2001
id = ISBN 0-486-41963-0
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