Beale number
In mechanical engineering, the Beale number is a parameter that characterizes the performance of Stirling engines. It is often used to estimate the power output of a Stirling engine design. For engines operating with a high temperature differential, typical values for the Beale number are in the range 0.11−0.15; where a larger number indicates higher performance.
Definition
The Beale number can be defined in terms of a Stirling engine's operating parameters:where:Bn is the Beale numberWo is the power output of the engine P is the mean average gas pressure or V is swept volume of the power piston F is the engine cycle frequency