DNW-NWB Wind Tunnel Experiments for Efficient Sequential Suction

Abstract

Investigations of multiple suction surfaces for the laminarization of future aircraft fuselages are carried out on a flat-plate model in the DNW-NWB wind tunnel facility. Different configurations of multiple suction panels are arranged on the five meter long flat plate for extended laminarization. Up to four sequential suction panels are installed simultaneously and operated at reference Reynolds numbers of up to 20 million. The fundamental approach for fuselage laminarization consists in suction walls for boundary layer stabilization and alternating regions without suction, where the flow field is kept laminar until the next suction wall starts.