Zobrazeno 1 - 10
of 14
pro vyhledávání: '"S. P. Pao"'
Publikováno v:
Journal of Fluids Engineering. 126:844-850
It is well known that the two-equation turbulence models under-predict mixing in the shear layer for high temperature jet flows. These turbulence models were developed and calibrated for room temperature, low Mach number, and plane mixing layer flows
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07a09c3e6198cf703d698eabe0827849
https://doi.org/10.1115/1.1792266
https://doi.org/10.1115/1.1792266
Publikováno v:
31st Joint Propulsion Conference and Exhibit.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22d7f5f52823518ada69974031292639
https://doi.org/10.2514/6.1995-2336
https://doi.org/10.2514/6.1995-2336
Publikováno v:
9th Applied Aerodynamics Conference.
A study demonstrating that flows inside transition ducts with unusual geometry can be analyzed by employing proper selections of a Navier-Stokes code, grid topology, and turbulence modeling is presented. Based on comparison between existing experimen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51edab97c7ba0497466fe38757d94869
https://doi.org/10.2514/6.1991-3342
https://doi.org/10.2514/6.1991-3342
Publikováno v:
29th Aerospace Sciences Meeting.
NASA-Langley's PAB3D-v3 multiblock/multizone Navier Stokes code is presently used to study the behavior of the longitudinally-slotted nozzle configuration for fixed-geometry operation in supersonic cruise on the bases of high nozzle pressure ratios.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d225ba521f6f338936f7bd42b271e44
https://doi.org/10.2514/6.1991-125
https://doi.org/10.2514/6.1991-125
Autor:
S. P. Pao, John M. Seiner
Publikováno v:
AIAA Journal. 21:687-693
This paper examines the fundamental mechanism of broadband shock noise in an improperly expanded supersonic jet. The study includes circular convergent and convergent-divergent nozzles. The main source of shock noise is determined to be the transient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76ad312fa82d87ce3bef424a92f93e1f
https://doi.org/10.2514/3.8134
https://doi.org/10.2514/3.8134
Autor:
S. P. Pao
Publikováno v:
Journal of Fluid Mechanics. 59:451-479
The Phillips (1960) convected wave equation is employed in this paper to study aerodynamic noise emission processes in subsonic and supersonic shear layers. The wave equation in three spatial dimensions is first reduced to an ordinary differential eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fefb0571077bf997cfb79e1c42f48e8
https://doi.org/10.1017/s0022112073001655
https://doi.org/10.1017/s0022112073001655
Autor:
S. P. Pao, L. B. Evans
Publikováno v:
The Journal of the Acoustical Society of America. 49:1069-1075
In dealing with wave propagation over land below 1000 Hz, ground attenuation is an important consideration. Very often, the actual ground surface is covered with a thick layer of vegetation that has a very high over‐all void‐to‐volume ratio. Su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40578ae8c42aba50f01591cd95ecac47
https://doi.org/10.1121/1.1912461
https://doi.org/10.1121/1.1912461
Autor:
S. P. Pao
Publikováno v:
3rd Aeroacoustics Conference.
Each supersonic jet contains a long segment of transonic flow, and it is known through acoustic experiments that the strongest noise production region is embedded in this segment. The linearized convected wave equation breaks down in the transonic re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58ac5f6007dc6314b7c78889d2ec3594
https://doi.org/10.2514/6.1976-488
https://doi.org/10.2514/6.1976-488
Autor:
S. P. Pao, L. Maestrello
Publikováno v:
2nd Aeroacoustics Conference.
Measurements of sound gradient near a subsonic jet have shown that coherent sound is emanated from the flow in the form of narrow beams. Within any given short period of time, sound appears to come from small volumes in the jet with a preferred direc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c492b8db29009deb118117b96c1ce98
https://doi.org/10.2514/6.1975-437
https://doi.org/10.2514/6.1975-437
Autor:
S. P. Pao, J. M. Seiner
Publikováno v:
7th Aeroacoustics Conference.
This paper examines the fundamental mechanism of broadband shock noise generation in an improperly expanded supersonic jet. The study includes circular convergent-divergent as well as circular convergent nozzles. The main source of shock noise is det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbe20b1bc13825414444e1b3525768bd
https://doi.org/10.2514/6.1981-1973
https://doi.org/10.2514/6.1981-1973