High subsonic flowfield measurements and turbulent flow analysis around a turret protuberance

Dejonckheere, R.; Russell, John J.; Chou, David C.

doi:10.2514/6.1982-57

Cited by 9 publications

(6 citation statements)

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“…Such a configuration typically consisted of a cylindrical base having a hemispherical cap and a flat or a conformal aperture. The resulting flow field is fairly complex as shown by de Jonckheere et al 7 . Investigations of flow control on these configurations included the effect of suction on the wake structure (Purhoit et al 8 ) and the addition of aft-mounted fairings and splitter plates (Snyder et al 9 ).…”

Section: Introductionmentioning

confidence: 90%

Fluidic Control of a Turret Wake, Part I: Aerodynamic Effects

Vukašinović¹,

Glezer²,

Gordeyev

et al. 2009

47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Section: Introductionmentioning

confidence: 90%

Fluidic Control of a Turret Wake, Part I: Aerodynamic Effects

Vukašinović¹,

Glezer²,

Gordeyev

et al. 2009

47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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“…Such a configuration typically consisted of a cylindrical base having a hemispherical cap and a flat or a conformal aperture. The resulting flow field is fairly complex as shown by de Jonckheere et al 7 . The attempts at flow control of such flows were done by examining the effect of suction on the wake structure (Purohit et al 8 ) and by addition of aft-mounted fairings and splitter plates (Snyder et al 9 ).…”

Section: Introductionmentioning

confidence: 90%

Active Control and Optical Diagnostics of the Flow Over a Hemispherical Turret

Vukašinović¹,

Glezer²,

Gordeyev

et al. 2008

46th AIAA Aerospace Sciences Meeting and Exhibit

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“…In Fig. 9a, Cp profiles averaged from all 200 frames were plotted with test data obtained by de Johckheere, et al 7 The test configuration, as sketched in Fig. 9b, contains a cavity window.…”

Section: Conformal Windowmentioning

confidence: 99%

CFD-based aero-optical performance prediction of a turret

Hsia

Lin²,

Loh³

et al. 2005

Laser Source and System Technology for Defense and Security

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An airborne optical system requiring a large field-of-regard will often use a hemisphere or similarly-shaped "turret" to transmit or receive radiation. The aerodynamic flow, however, creates disturbances about the turret resulting in the formation of turbulent boundary and shear layers, and flow separation. The disturbed flow is characterized by optical phase distortions that vary rapidly in time and degrade system performance.With the advancement of Computational Fluid Dynamics (CFD) and computing power, the complex flow field around the turret can be accurately modeled, both spatially and temporally. The density field is extracted from the flow field solution and interpolated within the volume defining the transmitted or received beam. By applying the Gladstone-Dale constant to obtain index of refraction, and integrating along the desired line-of-sight, time-dependent OPD (optical path difference) maps are obtained. These are used as complex field phase modifiers in the wave optics system performance analysis.This methodology was applied to a hemisphere-cylinder turret protruding from a flat plate in Mach 0.3 flow. Timeaccurate flow solutions capturing the flow separation and wake oscillations were obtained. Performance of both conformal and flat transmitting windows was assessed as a function of beam angle.

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High subsonic flowfield measurements and turbulent flow analysis around a turret protuberance

Cited by 9 publications

References 0 publications

Fluidic Control of a Turret Wake, Part I: Aerodynamic Effects

Fluidic Control of a Turret Wake, Part I: Aerodynamic Effects

Active Control and Optical Diagnostics of the Flow Over a Hemispherical Turret

CFD-based aero-optical performance prediction of a turret

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