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-premixed double concentric swirl-flame burner was used. Noise spectra were determined experimentally for the non-premixed swirl flame … coherence between different microphone pairs was also carried out to determine the acoustic behavior of a swirl stabilized …
Persistent link: https://www.econbiz.de/10010702459
has led to the application of RANS-based models to more and more complex flow problems and permitted the use of LES …-based models where previously not possible. The following article reviews the development of CFD as applied by the wind energy …
Persistent link: https://www.econbiz.de/10011030820
computational fluid dynamics (CFD) software CFdesign 2010. A validation study consisting of steady and rotating simulations was … conducted using a Savonius rotor and good agreement was obtained with experimental data. Steady two-dimensional CFD simulations … three-dimensional CFD simulations were conducted at several tip speed ratios with a freestream speed of 6 m/s. The predicted …
Persistent link: https://www.econbiz.de/10011045149
A novel computational fluid dynamics (CFD) model is presented for the study of the scavenging process and convective … resolved 12° sector, corresponding to one scavenge port, with cyclic boundaries in the tangential direction. The CFD model is … solution of the Reynolds-Averaged Navier–Stokes (RANS) equations subject to boundary conditions obtained through experiments …
Persistent link: https://www.econbiz.de/10011040335
Generators (WTGs). We have developed a CFD model for unsteady flow called Research Institute for Applied Mechanics, Kyushu … University, COMputational Prediction of Airflow over Complex Terrain (RIAM-COMPACT<sup>®</sup>). The RIAM-COMPACT<sup>®</sup> CFD … model is based on Large-Eddy Simulation (LES) technique. The computational domain of RIAM-COMPACT<sup>®</sup> can extend …
Persistent link: https://www.econbiz.de/10011030897
diffuser. When the swirling flow goes into the diffuser, the strength of the swirl changes the shock positions and the static … pressure. The strong swirl results in the shift forward of the shock and the non-uniform distributions of the static pressure. …
Persistent link: https://www.econbiz.de/10010808504
The equilibrium distributions of probabilities are derived on the basis of the maximum entropy principle (MEP) for the Renyi and Tsallis entropies. New S-forms for the Renyi and Tsallis distribution functions are found which are normalised with corresponding entropies in contrast to the usual...
Persistent link: https://www.econbiz.de/10011061616
We derive a generalized version of the work fluctuation theorem for non-equilibrium systems with spatio-temporal temperature fluctuations. For χ2-distributed inverse temperature, we obtain a generalized fluctuation theorem based on q-exponentials, whereas for other temperature distributions...
Persistent link: https://www.econbiz.de/10011062332
Large eddy simulations of a model scale tidal turbine encountering inflow turbulence have been performed. This has allowed both unsteady blade loading and hydrodynamic noise radiation to be predicted. The study is motivated by the need to assess environmental impact of tidal devices, in terms of...
Persistent link: https://www.econbiz.de/10010906482
A mean flow acoustic engine based on the aerodynamic effects converts wind energy and fluid energy in pipelines into acoustic energy which can be used to drive thermoacoustic refrigerators and transducers without any mechanical moving parts. A mean flow acoustic engine with the resonator tube...
Persistent link: https://www.econbiz.de/10011054807