图书馆订阅: Guest
TSFP DL Home 旧刊 执委

PIV MEASUREMENTS IN IMPINGING JETS AT A HIGH REYNOLDS NUMBER

Leon F.G. Geers
Department of Applied Physics Delft University of Technology PO Box 5046, 2600 GA Delft The Netherlands

Mark J. Tummers
Section of Transport Phenomena, Department of Chemical Engineering, Faculty of Applied Sciences Delft University of Technology and J. M. Burgerscentre for Fluid Dynamics Julianalaan, 2628 BL Delft

Kemal Hanjalic
Department of Physics, Novosibirsk State University (NSU), 1, Pirogov Str., Novosibirsk, 630090, Russia; Faculty of Applied Sciences, Delft University of Technology (TU Delft), Building 58, Van der Maasweg 9, 2629 HZ, Delft, The Netherlands

Abstract

The focus of the paper is on detailed measurements of mean flow and turbulence in the impingement zone of a multiple impinging jet set-up, using Particle Image Velocimetry (PIV). In order to verify our PIV system, the results of PIV and LDA measurements were conducted in a single impinging jet. Good agreement was observed between the results of both techniques. Subsequently, PIV measurements provided mean and fluctuating velocity fields in three planes in a multiple impinging jet set-up. A horse shoe type vortex was observed that circumscribes the outer jet of the array. Furthermore, compared to a single impinging jet the potential core of the central jet is significantly shorter.