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Acoustic techniques for temperature and flow velocity measurements

Technische Universiteit Eindhoven
Publication Date
  • Dissertations The And Tu/E
  • Temperature Measurement
  • Tomography
  • Computer Science
  • Design
  • Medicine
  • Musicology
  • Physics


thesis_Final.dvi Acoustic Techniques for Temperature and Flow Velocity Measurements Xiaogang Mao CIP-DATA LIBRARY TECHNISCHE UNIVERSITEIT EINDHOVEN Mao, Xiaogang Acoustic techniques for temperature and flow velocity measurements / by Xiaogang Mao. - Eindhoven : Technische Universiteit Eindhoven, 2005. - Proefschrift. ISBN 90-386-2321-6 NUR 926 Trefwoorden: akoestische meettechnieken / temperatuurmeting / stroom- snelheidsmeting / akoestische tomografie / biharmonische interpolatie Subject headings: acoustic measurement techniques / temperature mea- surement / flow velocity measurement / acoustic tomography / biharmonic interpolation Printed by Universiteitsdrukkerij, Technische Universiteit Eindhoven Cover design by Jan-Willem Luiten Copyright � 2005 by Xiaogang Mao Acoustic Techniques for Temperature and Flow Velocity Measurements PROEFSCHRIFT ter verkrijging van de graad van doctor aan de Technische Universiteit Eindhoven, op gezag van de Rector Magnificus, C.J. van Duijn, voor een commissie aangewezen door het College voor Promoties in het openbaar te verdedigen op dinsdag 25 oktober 2005 om 16.00 uur door Xiaogang Mao geboren te Chengdu, China Dit proefschrift is goedgekeurd door de promotoren: G.J.F. van Heijst en C.J. van Duijn Copromotor: S.J.L. van Eijndhoven to my parents to my wife Liya, my daughter Yifei and my son Yiming vi Summary This thesis presents an approach to reconstruct a temperature distribution and flow field in three dimensions. This approach is based on an acoustic measuring technique which resembles the classical tomography techniques where the high frequency electronic magnitude waves are replaced by low frequency sound waves. Acoustic measuring instruments make use of transducers, transmitters (speakers) and receivers (microphones), and algorithms (embedded software) to measure the air temperature and flow velocity simultaneously. The prin- ciple is the following. Th

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