要約

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.