A novel grazing flow rig for acoustic liner investigations

Francesco Taddei, Maurizio De Lucia, Atabak Pourreza, Hamid Rashidi, Giacomo Pierucci, Matteo Messeri, Federico Fagioli, Michele Salvestroni, Davide Torzo
2019 13th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics   unpublished
Acoustic liners can represent an effective strategy for noise reduction in aero engines. To assess the sound absorption effectiveness under representative operating conditions and to validate numerical methods, the treatments shall be characterized by using grazing flow rigs. Purpose of this survey is to describe the design solutions adopted in a brand-new test rig aimed at evaluating the performance of the liners under testing conditions representative of the turbine exhaust in an aircraft
more » ... in an aircraft engine, i.e. high flow speed and temperature. The main components of the rig have been numerically investigated from an aerodynamic, thermostructural and acoustic perspective. The relevant outcomes are reported in the paper. After the rig has been manufactured and assembled, a preliminary commissioning has been performed to verify the rig operability and performance, with special focus on the acoustic behavior.
doi:10.29008/etc2019-347 fatcat:kd2jkrhkxjf4xcjebu4x23ves4