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Hybrid modelling for echo location and surface characterization

✍ Scribed by D. de Cogan; M. Morton; D. Peel; V. Sant

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
237 KB
Volume
14
Category
Article
ISSN
0894-3370

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✦ Synopsis

Abstract

The scattering of sound from surfaces by rotating sources such as the tips of helicopter rotor blades can be used as a method of locating and ranging obstructions which may represent a physical danger to the craft. Modelling such systems presents some difficulties but these can be overcome using a combination of TLM and phase‐coherent ray‐tracing. This paper describes the hybrid approach, particularly, the techniques for interfacing. The application to the specific problem of the scattering of rotor‐tip noise from realistic targets involved the use of a simple PML and surface‐conforming boundaries. Copyright Β© 2001 John Wiley & Sons, Ltd.

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