Asymptotic/numerical analysis of supersonic propeller noise

Autor:	M. K. Myers, R. Wydeven
Rok vydání:	1991
Předmět:	Physics Asymptotic analysis Numerical analysis Acoustics Propeller Aerospace Engineering Supersonic airfoils Aerodynamics Mechanics Physics::Fluid Dynamics symbols.namesake Mach number Propulsor Aeroacoustics symbols Supersonic speed Noise (radio) Mathematics
Zdroj:	AIAA Journal. 29:1374-1382
ISSN:	1533-385X 0001-1452
DOI:	10.2514/3.10750
Popis:	An asymptotic analysis based on the Mach surface structure of the field of a supersonic helical source distribution is applied to predict thickness and loading noise radiated by high speed propeller blades. The theory utilizes an integral representation of the Ffowcs-Williams Hawkings equation in a fully linearized form. The asymptotic results are used for chordwise strips of the blade, while required spanwise integrations are performed numerically. The form of the analysis enables predicted waveforms to be interpreted in terms of Mach surface propagation. A computer code developed to implement the theory is described and found to yield results in close agreement with more exact computations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60274de44c90198665ed0f03372db96c https://doi.org/10.2514/3.10750 Zobrazit plný text záznamu