Subsonic Jet Pump Comparative Analysis

Abstract

The paper presents the numerical and experimental studies carried out to optimize, from an aerodynamic point of view, a subsonic jet pump used on aircraft. The optimization of the subsonic jet pump will be done from the aerodynamic, aiming to re-design it such as to reduce as much as possible the emitted noise levels. For this, in a first stage, a parametric set of Reynolds Averaged Navier - Stokes numerical simulation was used on several possible designs, starting from an existing baseline, and including it. The goal was to identify the trends in the flow behavior when key baseline design parameters were varied. During the second stage, aerodynamic measurements were carried out on the two selected configurations and on the baseline configuration for the determination of the instantaneous flow velocity field. The measurements were carried out using cutting edge experimental measure techniques, namely Particle Image Velocimetry. The paper presents a comparison of the numerical and the experimental results and the conclusions of the analysis of the results.

Keywords

• jet pump
• subsonic
• experimental test rig
• RANS
• efficiency calculation