Browsing by Author "Wasberg, Carl Erik"
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En sammenligning av beregnet og målt lydtrykk nær lette våpen
Huseby, Morten; Rahimi, Reza; Teland, Jan Arild; Wasberg, Carl Erik (2006)This report is part of an ongoing effort to improve the ability of the Norwegian Defence Estates Agency (FB) to assess noise pollution from firing ranges. At FFI we are currently developing methods to theoretically predict ... -
Final report: Improvement of the computational methods of the Norwegian Defence Estates Agency for computing noise from the Norwegian defence training ranges
Huseby, Morten; Rahimi, Reza; Teland, Jan Arild; Dyrdal Idar; Fykse, Haakon; Hugsted, Bjørn; Wasberg, Carl Erik; Aker, Eyvind; Cleave, Ra; Løvholt, Finn; Madshus, Christian; Rotschild (2008)This report summarizes efforts made to improve the ability of the Norwegian Defence Estates Agency (NODEA) to calculate noise and vibration levels from military activities. Accurate noise maps are essential for conforming ... -
Hydrodynamical simulations in FLUENT
Wasberg, Carl Erik; Reif, Bjørn Anders Pettersson (2010)A methodology for hydrodynamical simulations in FLUENT is described. The current application is the computational fluid dynamics analyses of two- and three-dimensional wings conducted as part of an underwater towing ... -
Numerical simulations of flow-induced vibrations on Orion P-3C
Reif, Bjørn Anders Pettersson; Wasberg, Carl Erik (2003)The radome mounted on the Orion P-3C has a significant adverse impact on the performance of the aircraft. Measurements have revealed low-frequency vibrations so severe that operational restrictions have been imposed. ... -
Spectral element benchmark simulations of natural convection in two-dimensional cavities
Gjesdal, Thor; Wasberg, Carl Erik; Reif, Bjørn Anders Pettersson (2004)This report presents the results of spectral element simulations of natural convection in two-dimensional cavities. In particular, a detailed comparison is performed with the reference data recently described by Christon ... -
Studies of aerodynamically induced vibrations on the P-3Cmaritime surveillance aircraft and proposed vibration reducing measures
Andreassen, Øyvind; Wasberg, Carl Erik; Helgeland, Anders; Tutkun, Murat; Kielland, Jan Charles; Reif, Bjørn Anders Pettersson; Skaugen, Atle (2013-01-31)After installation of a radome on the P-3C aircraft, vibrations occur in flight that were not present earlier. The vibrations are specially noticeable at high airspeeds. The cause of the vibrations is confirmed to be ... -
Variational multiscale turbulence modeling in a high-order spectral element method
Gjesdal, Thor; Wasberg, Carl Erik; Reif, Bjørn Anders Pettersson; Andreassen, Øyvind (2006)One of the more promising recent approaches to turbulence modelling is the Variational Myltiscale Large Eddy Simulation (VMS LES) method proposed by Hughes et al.[Comp. Visual. Sci., vol 3, pp 47-59, 2000]. This method avoids ...