Speaker
Mr
Eysteinn Helgason
(Chalmers University of Technology)
Description
At present the landing gear is becoming the dominant source for noise in
large airplanes. Simulations of airflow around a simplified landing gear
of an airplane have been performed in order to determine pressure
fluctuations around the landing gear. Different simulations methods have
been compared which gives us information on how to evaluate landing gear
performance without having to perform expensive wind tunnel experiments.
Simulations were performed using PANS and LES. Total CPU hours were
around 98000 on the Beda computer cluster.
The work was a part of Benchmark problems for Airframe Noise
Computations Workshop (BANC-1).
The work on an automatic shape optimization process will also be
presented. The optimization process is created by connecting three
commercial codes in a closed loop. Optimization is a computationally
intense process where each design is evaluated. Arrangements have been
made to decrease this computation time. Results showing the optimization
of the rear end of a simplified Volvo car model with respect to drag and
lift will be presented. Simulations were run on the computer cluster
Neolith using 18600 CPU hours.
Primary authors
Mr
Eysteinn Helgason
(Chalmers University of Technology)
Mr
Haukur Hafsteinsson
(Chalmers University of Technology)
Dr
Krajnovic Sinisa
(Chalmers University of Technology)
