The influence of stack temperature gradient on the acoustic power

Miloud Abidat , Mohamed Zohir Dar Ramdane , Mohamed Hamel , Leila Merahi , Omar Hireche

A numerical study of a standing-wave thermoacoustic engine startup is presented. The aim of this work is to study the effect of stack temperature gradient on the acoustic power. The analysis of the flow and the prediction of the heat transfer for different lengths of the heat exchangers are performed by solving the nonlinear unsteady Navier-Stocks equations using the finite volume method implemented in -ANSYS CFX- CFD code. Indeed, increasing the stack temperature gradient contributes to a rise of the amount heat exchanged between the working gas and the heat source and sink. This heat is transported to the stack and therefore more acoustic power is produced. The results show that the increases in the aerothermodynamics parameter of the working gas are proportional to the increase of the stack temperature gradient.

Mots clés: Thermoacoustic Engine; Heat Exchangers; Temperature Gradient; Acoustic Power

Domaines: Acoustique [physics.class-ph]

Miloud Abidat, Mohamed Zohir Dar Ramdane, Mohamed Hamel, Leila Merahi, Omar Hireche. The influence of stack temperature gradient on the acoustic power. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811225⟩