The Influence of Hydrodynamic Turbulence on Acoustic Turbulent Agglomeration

Abstract

The potential applications of acoustic agglomeration of aerosols in industry are usually under high flow rate conditions. The acoustic hydrodynamic turbulence-turbulence interaction in a resonance tube is the subject of this investigation. Measurements are made at both loop and node positions with a sound pressure level of 161.5 dB (re 20 μPa) and hydrodynamic Reynolds number Re ranging from 0 to 14000. Important parameters of the final state such as the rms turbulent velocity, the integral scale, the Taylor and Kolmogorov microscales, and the rate of turbulent energy dissipation ∈ are estimated. It is found that as long as the hydrodynamic flow is turbulent ∈ increases monotonically with increasing values of Re. Furthermore, ∈ is consistently larger at loop than at node. Based on this information, a numerical calculation of the turbulent agglomeration kernel KT is performed. The strong enhancement of the turbulence-turbulence interaction on KT at higher values of the Reynolds number Re indicates that the...