Author(s)

Carl Q. Howard

School of Mechanical Engineering, The University of Adelaide, Adelaide, Australia.

The purpose of this letter is to present the corrected expressions for the four-pole transmission matrix for a duct with a linear temperature gradient and an exponential temperature profile, described in Sujith [1]. The corrected equations are used in the analyses of a duct that is driven by a piston at one end and a rigid termination at the other end and the gas has a linear and exponential temperature gradients. The acoustic pressure and particle velocity along the duct are calculated and the theoretical results are compared with predictions using finite element analysis.

Duct; Transmission Matrix; Four-Pole; Temperature Gradient; Finite Element Analysis

C. Howard, "The Corrected Expressions for the Four-Pole Transmission Matrix for a Duct with a Linear Temperature Gradient and an Exponential Temperature Profile," Open Journal of Acoustics, Vol. 3 No. 3, 2013, pp. 62-66. doi: 10.4236/oja.2013.33010.