Publication detail

Energy efficient active control of the flow past an aircraft wing: RANS and LES evaluation

SKAROLEK, V. KARAMPELAS, S.

Czech title

Energeticky efektivní aktivní řízení proudění podél křídla letadla: RANS a LES hodnocení

English title

Energy efficient active control of the flow past an aircraft wing: RANS and LES evaluation

Type

journal article in Web of Science

Language

en

Original abstract

Numerical simulations of the flow past a NACA 0015 wing with active control have been performed. The Reynolds number of the flow based on the wing's chord is Re = 2.5 × 106. The configuration proposed in this study does not follow the conventional active control methodology past wings. Large blowing surfaces and low jet velocity magnitudes are considered and the energy efficiency of such configuration is examined for a number of variants. The present actuation reduces the profile drag of the wing and influences the flow mainly in two dimensions. Maximum drag decrease could be close to 40% at low angles of attack, with still positive energy income. Supportive Large Eddy Simulations at Re = 2.2 × 105 verify the trends of this control, which are predicted by Reynolds Averaged Navier–Stokes modelling.

Czech abstract

Byla provedena numerická simulace proudění kolem křídla s aktivním řízením. Reynoldsovo číslo je Re=2.5x106 vztaženo k délce tětivy. V tomto článku navrhovaná konfigurace nesleduje konvenční metodologii aktivního řízení. Jsou uvažovány velké plochy vyfukování a nízké rychlosti trysek a je zjištěna energetická efektivita této konfigurace. Jsou navrženy strategie pro snížení odporu a zvýšení vztlaku založené na změnách parametrů. Předkládané aktivní řízení proudu snižuje profilový odpor křídla a ovlivňuje proud ve dvou rozměrech. Maximální snížení odporu může být až 40% při nízkých úhlech náběhu s pozitivní energetickou bilancí. Simulace provedené s RANS modelem turbulence byly ověřeny pomocí Large Eddy simulace.

English abstract

Numerical simulations of the flow past a NACA 0015 wing with active control have been performed. The Reynolds number of the flow based on the wing's chord is Re = 2.5 × 106. The configuration proposed in this study does not follow the conventional active control methodology past wings. Large blowing surfaces and low jet velocity magnitudes are considered and the energy efficiency of such configuration is examined for a number of variants. The present actuation reduces the profile drag of the wing and influences the flow mainly in two dimensions. Maximum drag decrease could be close to 40% at low angles of attack, with still positive energy income. Supportive Large Eddy Simulations at Re = 2.2 × 105 verify the trends of this control, which are predicted by Reynolds Averaged Navier–Stokes modelling.

Keywords in English

Active flow control; High Reynolds; Wing; blowing; Drag reduction; LES

RIV year

2015

Released

21.10.2015

Publisher

Elsevier

Location

USA

ISSN

0307-904X

Volume

40

Number

2

Pages from–to

700–725

Pages count

26

BIBTEX


@article{BUT118017,
  author="Vilém {Skarolek} and Stavros {Karampelas},
  title="Energy efficient active control of the flow past an aircraft wing: RANS and LES evaluation",
  year="2015",
  volume="40",
  number="2",
  month="October",
  pages="700--725",
  publisher="Elsevier",
  address="USA",
  issn="0307-904X"
}