Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Richard G. Seasholtz"'
Autor:
Jayanta Panda, Richard G. Seasholtz
Publikováno v:
AIAA Journal. 44:1952-1959
Recent advancements in a molecular Rayleigh scattering based diagnostic technique allowed for simultaneous measurement of velocity and density fluctuations with high sampling rates. The technique was used to investigate unheated high subsonic and sup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4cdf5ed430354c7fc57872a143670a1
https://doi.org/10.2514/1.15638
https://doi.org/10.2514/1.15638
Publikováno v:
Experiments in Fluids. 39:441-454
Measurement of time-averaged velocity, density, temperature, and turbulence velocity fluctuations in sparsely seeded gas flows using a non-intrusive, point-wise technique based on Rayleigh and Mie scattering is discussed. A Fabry-Perot interferometer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5805020d255c460f9d1fef425612bd17
https://doi.org/10.1007/s00348-005-0990-8
https://doi.org/10.1007/s00348-005-0990-8
Autor:
Jayanta Panda, Richard G. Seasholtz
Publikováno v:
Journal of Fluid Mechanics. 450:97-130
The air density fluctuations in the plumes of fully expanded, unheated free jets were investigated experimentally using a Rayleigh-scattering-based technique. The point measuring technique used a continuous-wave laser, fibre-optic transmission and ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63eec346c5a2466ea4b6d163bce31cc7
https://doi.org/10.1017/s002211200100622x
https://doi.org/10.1017/s002211200100622x
Autor:
Jayanta Panda, Richard G. Seasholtz
Publikováno v:
Physics of Fluids. 11:3761-3777
The density field of underexpanded supersonic free jets issuing from a choked circular nozzle was measured using a Rayleigh scattering-based technique. This reliable and nonintrusive technique is particularly suitable for high-speed flows and is fund
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35338b5f62cf24e3ae9ad826cefe168c
https://doi.org/10.1063/1.870247
https://doi.org/10.1063/1.870247
Publikováno v:
Optics and Lasers in Engineering. 27:543-570
Flow diagnostics based on molecular Rayleigh scattering are discussed along with the results of a feasibility study to non-intrusively measure flow properties in a small supersonic wind tunnel. The technique uses an injection seeded, frequency double
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::feba22549d56fbfc13c140aa65bea725
https://doi.org/10.1016/s0143-8166(96)00063-2
https://doi.org/10.1016/s0143-8166(96)00063-2
Publikováno v:
AIAA Journal. 31:2098-2104
A new laser-induced Rayleigh scattering method is presented for the improved temperature diagnostics of gas flows. In the present technique, the two lines of a copper vapor laser are used to obtain the time and space resolved temperature. A single se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5bfa9356c223603025977933bfd8998f
https://doi.org/10.2514/3.11896
https://doi.org/10.2514/3.11896
Autor:
Richard G. Seasholtz, Mark P. Wernet
Publikováno v:
Applied optics. 26(21)
In laser anemometer systems, the flow fields under study are typically enclosed by a window. Aberration of a flat window can be corrected by a shift of the object distance. A zooming correction lens eliminates the astigmatism caused by a thick cylind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5280895e2fcefbdfd37d8ae6e92752da
https://pubmed.ncbi.nlm.nih.gov/20523412
https://pubmed.ncbi.nlm.nih.gov/20523412
Autor:
Richard G. Seasholtz, Jayanta Panda
Publikováno v:
43rd AIAA Aerospace Sciences Meeting and Exhibit.
Recent advancement in the molecular Rayleigh scattering based technique allowed for simultaneous measurement of velocity and density fluctuations with high sampling rates. The technique was used to investigate unheated high subsonic and supersonic fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::906dcb24a7428f7dd6d3de837659e00a
https://doi.org/10.2514/6.2005-514
https://doi.org/10.2514/6.2005-514
Publikováno v:
10th AIAA/CEAS Aeroacoustics Conference.
Heated jets in a wide range of temperature ratios (TR), and acoustic Mach numbers (Ma) were investigated experimentally using far field microphones and a molecular Rayleigh scattering technique. The latter provided density fluctuations measurements.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54ccbc8e300668a548002299e9bab900
https://doi.org/10.2514/6.2004-3016
https://doi.org/10.2514/6.2004-3016
Publikováno v:
42nd AIAA Aerospace Sciences Meeting and Exhibit.
A molecular Rayleigh scattering based flow diagnostic is developed to measure time average velocity, density, temperature, and turbulence intensity in a 25.4-mm diameter nozzle free jet facility. The spectrum of the Rayleigh scattered light is analyz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5dfdce374cb46a05c26aae3a9485304c
https://doi.org/10.2514/6.2004-706
https://doi.org/10.2514/6.2004-706