ART

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:

\( {\displaystyle B_{n}={\frac {Wo}{PVF}}} \)

where:

Bn is the Beale number
Wo is the power output of the engine (watts)
P is the mean average gas pressure (Pa) or (MPa, if volume is in cm3)
V is swept volume of the power piston (m3, or cm3, if pressure is in MPa)
F is the engine cycle frequency (Hz)

Estimating Stirling power

To estimate the power output of an engine, nominal values are assumed for the Beale number, pressure, swept volume and frequency, then the power is calculated as the product of these parameters, as follows:

\( {\displaystyle Wo=B_{n}PVF} \)

See also

West number

External links

Stirling Engine Performance Calculator
Beale number calculator

vte

Heat engines

Carnot engine Fluidyne Gas turbine Hot air Jet Minto wheel Photo-Carnot engine Piston Pistonless (Rotary) Rijke tube Rocket Split-single Steam (reciprocating) Steam turbine Stirling Thermoacoustic

Beale number West number

Timeline of heat engine technology

Thermodynamic cycle

Physics Encyclopedia

World

Index

Hellenica World - Scientific Library

Retrieved from "http://en.wikipedia.org/"
All text is available under the terms of the GNU Free Documentation License