A Biomimetic Study of the Explosive Discharge of the Bombardier Beetle

A Biomimetic Study of the Explosive Discharge of the Bombardier Beetle

N. Beheshti A.C. Mcintosh 

Energy and Resources Research Institute, University of Leeds, Leeds, UK

Page: 
61-69
|
DOI: 
https://doi.org/10.2495/D&N-V1-N1-61-69
Received: 
N/A
|
Accepted: 
N/A
|
Published: 
31 January 2006
| Citation

OPEN ACCESS

Abstract: 

A biomimetic study of the bombardier beetle’s explosive discharge apparatus was undertaken using numerical (CFD) modelling, first, of the beetle’s combustion chamber, and then of a scaled-up combustion chamber with a view to its application to devices such as gas turbine relighters. The new findings about the existence of a pressure release valve at the beetle’s combustion chamber exit yield a clearer understanding of the physics of the beetle’s mass ejection mechanism. The scaled-up chamber (about 1cm in length) is modelled by considering the chamber to be filled with liquid hexane which then undergoes vapour explosion through a pressure release valve at the exit. The ejection of vaporised fuel at high exit velocities has a number of applications, including gas turbine igniters.

Keywords: 

biomimetics, bombardier beetle, gas turbine relight, plasma injector, vapour explosion

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