Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow

Preliminary results of optical diagnostics of bow shocks in a supersonic wind tunnel by applying dual-hologram shear interferometry technique are discussed. A strong refraction effect of the probing beam penetrating a region in the vicinity of a bow shock over a blunt nose cone model has been discov...

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Autor: NIKOLAI KORNEEV ZABELLO
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2008
País:México
Institución:Instituto Nacional de Astrofísica, Óptica y Electrónica
Repositorio:Repositorio Institucional del INAOE
Idioma:inglés
OAI Identifier:oai:inaoe.repositorioinstitucional.mx:1009/1124
Acceso en línea:http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1124
Access Level:acceso abierto
Palabra clave:info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/22
info:eu-repo/classification/cti/2209
info:eu-repo/classification/cti/220907
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spelling Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flowNIKOLAI KORNEEV ZABELLOinfo:eu-repo/classification/cti/1info:eu-repo/classification/cti/22info:eu-repo/classification/cti/2209info:eu-repo/classification/cti/220907info:eu-repo/classification/cti/220907Preliminary results of optical diagnostics of bow shocks in a supersonic wind tunnel by applying dual-hologram shear interferometry technique are discussed. A strong refraction effect of the probing beam penetrating a region in the vicinity of a bow shock over a blunt nose cone model has been discovered. On a signal hologram the effect leads to the disappearance of holographic fringes in a narrow region attached to the shock wave front. A reconstructed interferogram in this region manifests the absence of an interference pattern. Computer simulations were performed for a part of the probing beam penetrating the area of high-density steep gradients of compressed air attached to the central part of the shock front of a bow shock. The compressed area was modeled as a hyperbolic cap. The bow shock was assumed axisymmetric. The simulations made it possible to evaluate angles of deflections and found conformity with reconstructed interferograms (shadowgraphs). It is concluded that in the above-indicated region of bow shocks probing light is deviated refractively into some angles, which could be large enough for light rays to be blocked out and never arrive at the detector (photo film). In the case when interferometric fringes disappear, the effect of strong refraction makes it impossible to measure air density gradients in some critical region.Optik2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1124reponame:Repositorio Institucional del INAOEinstname:Instituto Nacional de Astrofísica, Óptica y Electrónicainstacron:INAOEengcitation:Toker, Grigory and Korneev Zabello, Nikolai, (2008). Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow, Optik, Vol.119 (3): 112–116info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:inaoe.repositorioinstitucional.mx:1009/11242024-08-28T03:22:52Z
dc.title.none.fl_str_mv Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
title Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
spellingShingle Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
NIKOLAI KORNEEV ZABELLO
info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/22
info:eu-repo/classification/cti/2209
info:eu-repo/classification/cti/220907
info:eu-repo/classification/cti/220907
title_short Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
title_full Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
title_fullStr Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
title_full_unstemmed Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
title_sort Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow
dc.creator.none.fl_str_mv NIKOLAI KORNEEV ZABELLO
author NIKOLAI KORNEEV ZABELLO
author_facet NIKOLAI KORNEEV ZABELLO
author_role author
dc.subject.none.fl_str_mv info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/22
info:eu-repo/classification/cti/2209
info:eu-repo/classification/cti/220907
info:eu-repo/classification/cti/220907
topic info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/22
info:eu-repo/classification/cti/2209
info:eu-repo/classification/cti/220907
info:eu-repo/classification/cti/220907
description Preliminary results of optical diagnostics of bow shocks in a supersonic wind tunnel by applying dual-hologram shear interferometry technique are discussed. A strong refraction effect of the probing beam penetrating a region in the vicinity of a bow shock over a blunt nose cone model has been discovered. On a signal hologram the effect leads to the disappearance of holographic fringes in a narrow region attached to the shock wave front. A reconstructed interferogram in this region manifests the absence of an interference pattern. Computer simulations were performed for a part of the probing beam penetrating the area of high-density steep gradients of compressed air attached to the central part of the shock front of a bow shock. The compressed area was modeled as a hyperbolic cap. The bow shock was assumed axisymmetric. The simulations made it possible to evaluate angles of deflections and found conformity with reconstructed interferograms (shadowgraphs). It is concluded that in the above-indicated region of bow shocks probing light is deviated refractively into some angles, which could be large enough for light rays to be blocked out and never arrive at the detector (photo film). In the case when interferometric fringes disappear, the effect of strong refraction makes it impossible to measure air density gradients in some critical region.
publishDate 2008
dc.date.none.fl_str_mv 2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1124
url http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1124
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv citation:Toker, Grigory and Korneev Zabello, Nikolai, (2008). Disappearance of holographic and interference fringes accompanies optical diagnostics of a supersonic bow shock flow, Optik, Vol.119 (3): 112–116
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Optik
publisher.none.fl_str_mv Optik
dc.source.none.fl_str_mv reponame:Repositorio Institucional del INAOE
instname:Instituto Nacional de Astrofísica, Óptica y Electrónica
instacron:INAOE
instname_str Instituto Nacional de Astrofísica, Óptica y Electrónica
instacron_str INAOE
institution INAOE
reponame_str Repositorio Institucional del INAOE
collection Repositorio Institucional del INAOE
repository.name.fl_str_mv
repository.mail.fl_str_mv
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