# Beale number

## Description

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. Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, such that there is a net conversion of heat energy to mechanical work. For engines operating with a high temperature differential, typical values for the Beale number range from ( 0.11 ) to ( 0.15 ); where a larger number indicates higher performance.

Related formulas## Variables

B_{n} | Beale number (dimensionless) |

W_{0} | The power output of the engine (watt) |

P | The mean average gas pressure (Pa) |

V | Swept volume of the power piston (m^{3}) |

f | The engine cycle frequency (Hz) |