06-05-2019 | Ralf Rudnik: 116th NIA CFD Seminar: In-Tunnel Simulation of the HL-CRM in the LaRC 14 x 22 ft. Wind Tunnel - Part II: Model-in-Tunnel Simulation Using TAU-DRSM
Title: 116th NIA CFD Seminar: In-Tunnel Simulation of the HL-CRM in the LaRC 14 x 22 ft. Wind Tunnel – Part II: Model-in-Tunnel Simulation Using TAU-DRSM
Speaker: Ralf Rudnik, Visiting Researcher, NIA
Date: Wednesday, June 5, 2019
Location: NIA, Room 137
The presentation gives an overview about a first set of results of in-tunnel CFD simulations of the HL-CRM wing/body configuration in the LaRC 14 x 22 ft. wind tunnel, loosely linked to wind tunnel tests that have been conducted in late 2018. The simulations are carried out using DLR’s TAU code in conjunction with a differential variant of the SSG/LRR Reynolds Stress turbulence model. To prepare for this study, different in-tunnel simulation approaches have been previously verified for the empty high speed leg of the 14 x 22 ft. wind tunnel against existing FUN3D and USM3D results (see 109th NIA CFD Seminar). The study compares results of the HL-CRM in landing configuration installed in the test section against free air computations for low speed high lift conditions. Main objectives are to assess the impact the semispan mounting and the wind tunnel walls on the aerodynamic characteristics of the configuration prior to the application of wind tunnel corrections, to investigate the fundamental aerodynamic interference phenomena involved, and to assess methodological issues involved in the simulation approach, such as grid topology and turbulence modeling.
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 research project HINVA (High Lift Inflight Validation). In this context, he has been responsible for dedicated stall 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 and in research and committee activities of the AIAA High Lift Prediction workshop.
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.