Topic: 109th NIA CFD Seminar: In-Tunnel CFD Simulation of the HL-CRM in the LaRC 14 x 22 ft Wind Tunnel – Part I: Empty Tunnel Simulation Approaches and Verification Using TAU-DRSM
Speaker: Ralf Rudnik, DLR’s Institute of Aerodynamics and Flow Technology – Braunschweig & Visiting Researcher, NIA
Date: Thursday, March 14, 2019
Time: 2pm-3pm (EST)
Room: NIA, Rm137
Abstract: The presentation summarizes preparatory studies for envisaged in-tunnel simulations of the HL-CRM in the LaRC 14 x 22 ft. wind tunnel. Corresponding tests have been conducted in late 2018. DLR’s in-tunnel simulation approach based on RANS computations is outlined and verified against existing empty tunnel computations of the 14 x22 ft wind tunnel carried out using FUN3D and USM3D. Based on this verification, different numerical approaches for the computation of the so-called high speed leg of the tunnel are compared. In this context, modification of the inlet and the diffuser are presented. Finally, a grid refinement study for the flow in the empty high speed leg is presented in order to highlight impacts of grid resolution on flow features in the rectangular duct. The studies are carried out using DLR’s TAU code in conjunction with a differential variant of the SSG/LRR Reynolds Stress turbulence model.
Speaker Bio: Ralf Rudnik is heading the transport aircraft department at DLR’s Institute of Aerodynamics and Flow Technology in Braunschweig since 2003. His scientific focus is on high lift aerodynamics, engine/airframe integration, and CFD validation. Dr. Rudnik participated in numerous collaborative research projects on aerodynamic validation and acted as a coordinator of the European high lift project EUROLIFT and the German LuFo project HINVA (High Lift Inflight Validation). In this context, he has been responsible for dedicated stall flight tests with DLR’s Airbus A320 ATRA flight test aircraft, carried out in close collaboration with Airbus. He is currently engaged in research activities on STOL aircraft featuring circulation control and over-the-wing mounted engines embedded in the German Coordinated Research Centre CRC 880. Ralf Rudnik holds a diploma degree in aerospace engineering from the Technical University of Braunschweig. He received a doctoral degree from the Technical University of Berlin. Since 2006 he teaches configuration aerodynamics at the Technical University of Braunschweig. He is a visiting researcher at NIA since September 2018.