Aerodynamics and Acoustics in Jet Flows

In the light of rapidly increasing applications of large-eddy simulations (LES), it is deemed necessary to impose some quality assessment measures for such studies. The verification of LES calculations is difficult because of the fact that both the subgrid scale (SGS) model contribution and numerical discretization er…

Detailed instantaneous velocity fields of a jet in crossflow have been measured with stereoscopic particle image velocimetry (PIV). The jet originated from a fully developed turbulent pipe flow and entered a crossflow with a turbulent boundary layer. The Reynolds number based on crossflow velocity and pipe diameter wa…

In the literature, phononic band gaps in periodic media are generated via two different means, namely, Bragg scattering and local resonances. In this paper, an alternative method is introduced, in which effective inertia of the wave propagation medium is amplified via embedded amplification mechanisms. A prototype two…

• ÇETİN YILMAZ

No abstract yet.

• ÇETİN YILMAZ

Gusts of moderate and large magnitude induce flow separation and other complexities when they interact with the lifting surfaces of air vehicles. The presence of these nonlinear gusts are becoming ubiquitous in twenty-first-century air vehicles, where the classic potential flow–based methodologies applied in the past…

• NURİYE LEMAN OKŞAN ÇETİNER YILDIRIM

Abstract A novel implicit cell‐vertex finite volume method is described for the solution of the Navier–Stokes equations at high Reynolds numbers. The key idea is the elimination of the pressure term from the momentum equation by multiplying the momentum equation with the unit normal vector to a control volume boundary…

• MEHMET ŞAHİN

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• SİNAN ÇALIŞKAN

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• TAMER ÇALIŞIR

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• YUSUF ÖZYÖRÜK

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• YÜCEL ÖZMEN

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• MEHMET BARIŞ ÖZERDEM

The instantaneous and averaged flow structure past a delta wing of low sweep angle is investigated using a technique of high-image-density particle image velocimetry. Emphasis is on crossflow planes, where vortex breakdown and stall occur, and the identification of buffeting mechanisms in these regions. At all values…

• BÜLENT YANIKTEPE