2013
DOI: 10.1117/1.oe.52.7.071405
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In-flight aero-optics of turrets

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Cited by 61 publications
(36 citation statements)
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“…In this flow regime, the shock forms upstream, gains the strength and moves upstream over the aperture in almost periodic fashion. Very similar shock dynamics was reported over 3-D turret at transonic speeds [25]. For demonstration purposes, only the weak shock case was considered in the paper.…”
Section: Experimental Setup and Flow Regimesmentioning
confidence: 56%
“…In this flow regime, the shock forms upstream, gains the strength and moves upstream over the aperture in almost periodic fashion. Very similar shock dynamics was reported over 3-D turret at transonic speeds [25]. For demonstration purposes, only the weak shock case was considered in the paper.…”
Section: Experimental Setup and Flow Regimesmentioning
confidence: 56%
“…There has been extensive experimental work done to study these hemispherical turrets in the last decade. This work includes characterizing both the aerodynamic [1,2,3] and aero-optic [4,5,6] performance of the flow around the turrets at subsonic and transonic speeds. In addition to these experimental studies, there have been extensive CFD studies into the flow around hemispherical turrets [7,8,9,10,11].…”
Section: Introductionmentioning
confidence: 99%
“…The surface pressure field on the turret carries both the signature of the turbulent structures in the turret's vicinity and any global pressure modes over the turret. Both the global pressure modes and the turbulent structures have been shown to affect the optical performance of the turret American Institute of Aeronautics and Astronautics [4,5,6]. Further, the unsteady loading on the turret is directly a function of the unsteady pressure field.…”
Section: Introductionmentioning
confidence: 99%
“…At high subsonic speeds and greater, the turbulent boundary-layers, shear-layers, and shocks that form in the vicinity of the turret, shown in Fig. 1, become optically active creating a complex aberrating flow topology [1,2]. Significant research has focused on the development of active and passive flow-control techniques for these turret flows to control the separation points around the turret and limit the impact of these aberrating flows on the field-of-regard of the HEL systems.…”
Section: Introductionmentioning
confidence: 99%
“…n recent years the optical environment encountered by high-energy laser (HEL) systems on fixed-wing platforms has received increased attention [1][2][3][4][5][6][7]. These platforms commonly employ hemisphere-on-cylinder turrets because of their large field of view, ability to easily aim the outgoing beam, and similar aerodynamic characteristics in all orientations.…”
Section: Introductionmentioning
confidence: 99%