A measurement method of the flow rate in a pipe using a microphone array

A method of measuring the flow rate in a pipe is proposed. The method utilizes one-dimensional acoustic pressure signals that are generated by a loud speaker. A microphone array mounted flush with the inner pipe wall is used to measure the signals. A formula for the flow rate, which is a function of the change of wave number, is derived from a simple mathematical model of sound field in the pipe conveying a viscous fluid. The change of the wave number. which is one of the results caused by flow, is estimated from the recursive relation among the measured microphone array signals. Since measurement errors, due to extraneous measurement noise and mismatch of response characteristics between microphones, exist in the estimated flow rate, a method of compensating the errors is proposed. By using this measurement method, the flow rate can be obtained more accurately than that of our previous method. To verify applicability of the measurement method, numerical simulation and experiments are performed. The estimated flow rates are within 5% error bound. (C) 2002 Acoustical Society of America.
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Issue Date
2002-09
Language
ENG
Keywords

MEAN FLOW

Citation

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v.112, no.3, pp.856 - 865

ISSN
0001-4966
URI
http://hdl.handle.net/10203/3848
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
i_j_36.pdf(252.16 kB)Download
  • Hit : 544
  • Download : 805
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 2 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0