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EXPERIMENTAL INVESTIGATION OF TURBULENT FLOW IN AN IDEALIZED HUMAN AIRWAY IN THE EXTRATHORACIC REGION

A. Johnstone
Department of Mechanical Engineering, Queen's University Kingston, Ontario, K7L 3N6 CANADA

A. Heenan
Department of Mechanical Engineering, Queen's University Kingston, Ontario, K7L 3N6 CANADA

Andrew Pollard
Department of Mechanical and Materials Engineering, Queen's University, Kingston, Ontario Canada K7L 3N6

E. A. Matida
Department of Mechanical Engineering, University of Alberta, Edmonton; Dept. of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Ontario K1S 5B6, Canada

Warren H. Finlay
Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 2G8 Canada

Resumo

The mean and RMS axial velocity field in an idealized representation of the human extrathoracic airway (ETA) during steady inspiration was studied experimentally using hot-wire anemometry and flow visualization techniques. Physiologically correct flow rates in the range of 10, 15, 30, 45, 60, and 90 liters per minute for hot-wire measurements and 30, 60, and 120 liters per minute for flow visualization measurements are considered. These data were then compared to previously obtained Particle Image Velocimety (PIV) data and Reynolds-Averaged Navier-Stokes (RANS) Computational Fluid dynamics (CFD), all of which used an identical ETA model. Flow in the ETA was found to be very complex, with separated, secondary, and recirculating flow regions present at numerous model locations. Comparison of hot-wire, PIV and CFD results are made.