SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Al Sam Ali) srt2:(2015)"

Sökning: WFRF:(Al Sam Ali) > (2015)

  • Resultat 1-3 av 3
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Al Sam, Ali, et al. (författare)
  • Evaluation of sub grid scale and local wall models in Large-eddy simulations of separated flow
  • 2015
  • Ingår i: 2nd Symposium on OpenFOAM® in Wind Energy. - : EDP Sciences. ; 5
  • Konferensbidrag (refereegranskat)abstract
    • The performance of the Sub Grid Scale models is studied by simulating a separated flow over a wavy channel. The first and second order statistical moments of the resolved velocities obtained by using Large-Eddy simulations at different mesh resolutions are compared with Direct Numerical Simulations data. The effectiveness of modeling the wall stresses by using local log-law is then tested on a relatively coarse grid. The results exhibit a good agreement between highly-resolved Large Eddy Simulations and Direct Numerical Simulations data regardless the Sub Grid Scale models. However, the agreement is less satisfactory with relatively coarse grid without using any wall models and the differences between Sub Grid Scale models are distinguishable. Using local wall model returned the basic flow topology and reduced significantly the differences between the coarse meshed Large-Eddy Simulations and Direct Numerical Simulations data. The results show that the ability of local wall model to predict the separation zone depends strongly on its implementation way.
  •  
2.
  •  
3.
  • Al Sam, Ali, et al. (författare)
  • The Influence of Sea Waves on Offshore Wind Turbine Aerodynamics
  • 2015
  • Ingår i: Journal of Energy Resources Technology. - : ASME International. - 1528-8994 .- 0195-0738. ; 137:5
  • Tidskriftsartikel (refereegranskat)abstract
    • The impacts of swells on the atmospheric boundary layer (ABL) flows and by this on the standalone offshore wind turbine (WT) performance are investigated by using large eddy simulations (LES) and actuator-line techniques. At high swell to wind speed ratio, the swell-induced stress reduces the total wind stress resulting in higher wind velocity, less wind shear, and lower turbulence intensity level. These effects increase by increasing swell to wind speed ratio (C/U) and/or swell steepness. Moreover, for the same hub-height wind speed (U-hub), the presence of swells increases the turbine power extraction rate by about 3% and 8.4% for C/U-hub = 1.53 and 2.17, respectively.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-3 av 3
Typ av publikation
konferensbidrag (2)
tidskriftsartikel (1)
Typ av innehåll
refereegranskat (3)
Författare/redaktör
Szász, Robert-Zoltán (3)
Al Sam, Ali (3)
Revstedt, Johan (3)
J. Churchfield, Matt ... (1)
Lärosäte
Lunds universitet (3)
Språk
Engelska (3)
Forskningsämne (UKÄ/SCB)
Teknik (3)
År
2015 (3)Ta bort avgränsningen

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy