Mukutmoni, D., Powell, R., and Mutnuri, L., "Investigation of Thermo-Acoustic Excitations in a Rijke Tube Geometry," SAE Int. J. Passeng. Cars - Mech. Syst. 7(3):1175-1182, 2014, doi:10.4271/2014-01-1981.
Flow generated acoustic sources are of significant import for automotive applications since perception of noise is a critical customer satisfaction issue. High temperature acoustic sources known as thermo-acoustics such as those occurring inside an exhaust system of a vehicle, an important subset of acoustic sources, is the subject of the investigation.In this article, we study a Rijke tube configuration that consists of a vertical and hollow cylindrical tube open at both ends where sound is generated by buoyancy driven flow as a result of a heated wire gauze placed in the bottom half of the tube. This configuration captures the essence of the thermo-acoustic phenomena and was investigated both numerically and experimentally and good agreement was observed between the two.