Acoustic intensity measurement in a narrow duct by a two-sensor method.
The use of two pressure sensors [Fusco et al., J. Acoust. Soc. Am. 91, 2229 (1992)] makes it possible to determine the acoustic intensity of a gas column in a duct, but the application of this method was limited to wide ducts. In this letter, the formulation of the method is modified to include narrow ducts where the duct radius is as small as the viscous boundary layer thickness of the gas. The validity of this method is shown by comparison with the direct measurements of the pressure and velocity.
Biwa
Tetsushi
T
Department of Mechanical Systems and Design, Tohoku University, Sendai, Japan.
Tashiro
Yusuke
Y
Nomura
Hiroshi
H
Ueda
Yuki
Y
Yazaki
Taichi
T
D000162:Acoustics / Q000295:instrumentation*; D000465:Algorithms; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry*; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers
D005740:Gases