Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Gerry L. Mcaninch"'
Publikováno v:
14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference).
NASA's current predictive capabilities using the ray tracing program (RTP) are validated using helicopter noise data taken at Eglin Air Force Base in 2007. By including refractive propagation effects due to wind and temperature, the ray tracing code
Autor:
Stephanie L. Heath, Gerry L. Mcaninch
Publikováno v:
44th AIAA Aerospace Sciences Meeting and Exhibit.
The eiconal and ray equations for a stratified moving medium are analyzed to determine which rays connect a source located at an altitude z = z(sub s) to an observer on the ground plane. The characteristics of all available rays are ascertained. Furt
Autor:
Stephanie L. Heath, Gerry L. Mcaninch
Publikováno v:
44th AIAA Aerospace Sciences Meeting and Exhibit.
Propagation characteristics for varying wind and temperature atmospheric conditions are identified using physically-limiting propagation angles to define shadow boundary regions. These angles are graphically illustrated for various wind and temperatu
Autor:
Gerry L. McAninch
Publikováno v:
The Journal of the Acoustical Society of America. 104:1848-1849
A major concern of recent sonic boom work has been accounting for the effects of molecular relaxation on sonic boom waveforms. Several new codes accounting for these effects have been developed since sonic boom research was reinitiated. In order to v
Autor:
Gerry L. Mcaninch
Publikováno v:
AIAA Journal. 24:253-260
Asymptotic solutions of order k-n are developed for the equations governing the propagation of sound through a stratified moving medium. Here k is a dimensionless wave number and n is the arbitrary order of the approximation. These approximations are
Autor:
M. K. Myers, Gerry L. Mcaninch
Publikováno v:
AIAA Journal. 27:1479-1486
The parabolic approximation for the acoustic equations of motion is applied to the study of the sound field generated by a time harmonic plane wave at grazing incidence to a finite impedance boundary. The resulting equations possess a solution that m
Autor:
Gerry L. Mcaninch
Publikováno v:
9th Aeroacoustics Conference.
Asymptotic solutions of order k-n are developed for the equations governing the propagation of sound through a stratified moving medium. Here k is a dimensionless wave number and n is the arbitrary order of the approximation. These approximations are
Autor:
Gerry L. Mcaninch
Publikováno v:
11th Aeroacoustics Conference.
Conference
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Conference
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