Zobrazeno 1 - 10
of 1 076
pro vyhledávání: '"W R, Graham"'
Autor:
C. E. Pearson, W. R. Graham
Publikováno v:
AIAA Journal. :1-12
Vertical-axis wind turbines are an attractive option for small-scale wind-power installations. In this application, noise is crucially important. To investigate the problem, measurements taken from a model-scale turbine in a wind tunnel are considere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c67df6031f6b1e79d259c555da2d945
https://doi.org/10.2514/1.j060531
https://doi.org/10.2514/1.j060531
Autor:
W. R. Graham
Publikováno v:
AIAA Journal. 57:3456-3466
Noise-source identification using microphone arrays has become well-established in wind-tunnel testing. When the sources are moving, the accepted approach is first to “de-Dopplerize” the microphone...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd32666bba7311921cd2848b8e7d33ca
https://doi.org/10.2514/1.j058016
https://doi.org/10.2514/1.j058016
Publikováno v:
Journal of Fluid Mechanics. 870:492-518
Added mass characterises the additional force required to accelerate a body when immersed in an ideal fluid. It originates from an asymmetric change to the surrounding pressure field so the fluid velocity satisfies the no-through-flow condition. This
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6670cf9221d31c916152bf652bef0237
https://doi.org/10.1017/jfm.2019.231
https://doi.org/10.1017/jfm.2019.231
Autor:
C. E. Pearson, W. R. Graham
Publikováno v:
The Journal of the Acoustical Society of America. 150:1-1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::259de95b949a72c7cf59637bfe26d3fa
https://doi.org/10.1121/10.0005490
https://doi.org/10.1121/10.0005490
Autor:
W. R. Graham
In analysing fluid forces on a moving body, a natural approach is to seek a component due to viscosity and an `inviscid' remainder. It is also attractive to decompose the velocity field into irrotational and rotational parts, and apportion the force
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c4190590f9bbd589f303c03ea2372b8
https://www.repository.cam.ac.uk/handle/1810/297330
https://www.repository.cam.ac.uk/handle/1810/297330
Autor:
W. R. Graham
‘De-Dopplerisation’ is one aspect of a problem frequently encountered in experimental acoustics: deducing an emitted source signal from received data. It is necessary when source and receiver are in relative motion, and requires interpolation of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3fec5fa6c6579ed1dd1143780800c19
Autor:
Tariq Saeed, W. R. Graham
Publikováno v:
Journal of Aircraft. 52:1373-1385
The Greener by Design initiative has identified the laminar-flying-wing configuration as the most promising long-term prospect for fuel-efficient civil aviation. However, in the absence of detailed evaluations, its potential remains uncertain. As an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67a5086cc2522e6310786895c9e67d0a
https://doi.org/10.2514/1.c032862
https://doi.org/10.2514/1.c032862
Autor:
C. E. Pearson, W. R. Graham
Publikováno v:
The Journal of the Acoustical Society of America. 137:EL111-EL116
Vertical-axis wind turbines are wind-energy generators suitable for use in urban environments. Their associated noise thus needs to be characterized and understood. As a first step, this work investigates the relative importance of harmonic and broad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee92484029a5a28fe7901f550179ccd3
https://doi.org/10.1121/1.4904915
https://doi.org/10.1121/1.4904915
The ready availability of full-field velocity measurements in present-day experiments has kindled interest in using such data for force estimation, especially in situations where direct measurements are difficult. Among the methods proposed, a formul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a04d4bffc9458e8c0f7f82c8687f5dfa
Autor:
A. Gatto, W. R. Graham
© 2016 by A. Gatto. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.Unsteady flow around deployed landing gears is a significant contributor to aircraft noise on approach. The farfield sound is largely dete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d1c07d123c954e6dd13e358549a2621
https://www.repository.cam.ac.uk/handle/1810/256611
https://www.repository.cam.ac.uk/handle/1810/256611