Work

Experimental study of the vortex organization in a rectangular impinging jet in the presence of self-sustained tones

Year: 2021

Type: article

Abstract: Impinging jets could be used in the terminal elements of ventilation systems to ensure a better air mixing in the residential buildings. However, under certain configurations, these jets could be accompanied by a whistling tone. This whistling tone is amplified when the jet encounters a slotted obstacle in its flow. Usually, for a given Reynolds number, these tones are characterized by a single frequency. In this study, we represent the jet behavior for a Reynolds number Re=5900 where two different frequencies are obtained in the spectrum of the whistling tone signal. This unusual aspect is related to an altered vortex organization as we will show using Stereoscopic PIV (SPIV) measurements.

Source: Energy Reports

DOI: 10.1016/j.egyr.2021.11.275

Authors: Marwan Alkheir, Hassan H. Assoum, Jana Hamdi, Tarek Mrach, Mouhammad EL Hassan, Anas Sakout