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Flow measurements of supersonic flow past an ogive-cylinder in the presence of off-axis laser energy deposition
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Pournadali Khamseh, Arastou. Flow measurements of supersonic flow past an ogive-cylinder in the presence of off-axis laser energy deposition. Retrieved from https://doi.org/doi:10.7282/t3-xxce-4g26

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TitleFlow measurements of supersonic flow past an ogive-cylinder in the presence of off-axis laser energy deposition
NamePournadali Khamseh, Arastou (author); DeMauro, Edward (chair); Knight, Doyle (member); Shan, Jerry (member); DeMauro, Edward (member); Rutgers University; School of Graduate Studies
Date Created2021
Other Date2021-10 (degree)
SubjectMechanical engineering, Fluid mechanics, Aerospace engineering, Compressible flow, Energy deposition, High-speed shadowgraph imaging, Laser energy deposition, Stereoscopic Particle Image Velocimetry, Supersonic flow control
Extent1 online resource (xi, 69 pages) : illustrations
DescriptionExperiments were performed within Rutgers University’s supersonic wind tunnel to investigate the effects of laser energy deposition on the flowfield around an ogive-cylinder. The goal of this work is to study the ability of laser energy deposition to achieve appreciable alterations of flowfield around the ogive-cylinder. For these tests, perturbation of the flow was achieved using a PIV Nd:YAG laser to generate a spark near the ogive-cylinder. Energy measurements were performed to estimate what percentage of laser energy can be deposited into the plasma. The results showed nearly 60% of laser energy could be deposited for the high-end of laser energy. Qualitative visualization of the global flowfield was accomplished using high-speed shadowgraph imaging, which verified the formation of a spark and the classically defined toroidal vortex structure. Furthermore, high-speed shadowgraph imaging visualized the passage of the spark across the ogive-cylinder shock structure, where lensing of the shock was observable.

Blast wave propagation was studied in the quiescent condition and in the presence of the supersonic cross flow. It was observed that the blast wave propagation speed decayed to a sound wave indicating that the blast wave was in the free attenuation stage. In addition to qualitative tests, Stereoscopic Particle Image Velocimetry (SPIV) measurements were performed on the baseline flowfield to study the flowfield more quantitatively. The presence of a shock wave was resolved by the sudden changes in the magnitude of velocity components. In addition, the presence of an expansion fan was observed in the rear corner of the ogive cylinder by the increase in the vertical component of velocity.
NoteM.S.
NoteIncludes bibliographical references
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-xxce-4g26
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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