Title :
Laser Doppler velocimetry and computer automation to measure low velocities in a pulmonary model
Author :
Corieri, P. ; Riethmuller, M.L.
Author_Institution :
Karman Inst., Rhode St. Genese, Belgium
Abstract :
Laser Doppler measurements of the velocity field in a channel simulating pulmonary flows, characterized by a large range of velocities extending on the low side, are presented. A technique using a computer-controlled spectrum analyzer for the low velocities and a conventional period counter for the higher ones is discussed. The aim of the study is to determine the characteristics of a laminar, three-dimensional, steady flow at low Reynolds number in one bifurcation. The computer automation of measurements developed to overcome the complexity of the control of the measurement technique and the large number of measurement points necessary to characterize the flow in the bifurcation is described. Very good accuracy is obtained, and both measurement methods give extremely coherent results
Keywords :
Doppler effect; biological techniques and instruments; biology computing; biomedical measurement; computerised instrumentation; computerised picture processing; digital simulation; flow visualisation; laser velocimetry; lung; pneumodynamics; spectral analysers; 3D flow; Reynolds number; bifurcation; computer automation; computer-controlled spectrum analyzer; laminar flow; laser Doppler velocimetry; lung; period counter; pneumodynamics; pulmonary model; steady flow; velocity field; Automatic control; Automation; Bifurcation; Computational modeling; Counting circuits; Doppler measurements; Fluid flow measurement; Laser velocimetry; Measurement techniques; Spectral analysis;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1989. ICIASF '89 Record., International Congress on
Conference_Location :
Gottingen
DOI :
10.1109/ICIASF.1989.77676
