%C Kuala Lumpur
%T Data acquisition and control system for on-line measurement and analysis of complex flow fields
%A H.H. Al-Kayiem
%D 2010
%R 10.1109/ICIAS.2010.5716184
%O cited By 0; Conference of 2010 International Conference on Intelligent and Advanced Systems, ICIAS 2010 ; Conference Date: 15 June 2010 Through 17 June 2010; Conference Code:84196
%J 2010 International Conference on Intelligent and Advanced Systems, ICIAS 2010
%L scholars924
%K Accurate measurement; Complex flow; Complex flow field; Complex flow measurement; Complicated flow; Computer interfacing; Electronic component; Error limits; Flying hot wire; Hot-wire Anemometry; Hot-wire probes; Interface; Main component; Mean velocities; Motor control unit; On-line data acquisition; On-line measurement; Pre-selected; Reversal flow; Validity tests; Velocity components; Wake flows, Anemometers; Computer programming; Data acquisition; Flow fields; Flow measurement; Flowmeters; Measurement errors; Minicomputers; Probes; Signal analysis; Velocity; Wakes; Wire, Data flow analysis
%X The accurate measurements in complicated flow fields like the reversal and wake flows are representing a challenge for the fluid dynamics researchers. The present paper deals with the description of a developed flying X-hotwire probe / computer interfacing technique which enables detailed turbulence evaluation within reversal and wake flows. The probe attacks the flow and sweeps within the flow field with a velocity higher than the reversal flow velocity. The signals at 19 pre-selected points (per sweep) in the flow field are transferred to a minicomputer for on-line data acquisition and analysis. The main components of the system are the flying hot wire mechanism, motor control unit, interfacing unit and a minicomputer. The electronic components and their programming and functioning are described in details in this paper. The validity tests of the developed system are presented and discussed. The results showed that the system is capable to measure the 2-D velocity components in mean velocity of around 5 m/s within an error limit of ± 0.9. For higher mean velocity, of 19.7 m/s, the system measures the two velocity components with an error limit of ± 0.57. Within such limits of errors, the system is verified for measurement in complex flows with good accuracy.