Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Rakesh C. Ramachandran"'
Publikováno v:
Wind Engineering. 40:319-342
Related reviews are given of (1) international wind turbine noise regulations and standards and (2) modern experimental methods in aeroacoustic measurement with sample applications. For the latter, specific emphasis has been placed on three measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81fe0ecdbeab9d21735ccb3c7d5e5993
https://doi.org/10.1177/0309524x16649080
https://doi.org/10.1177/0309524x16649080
Publikováno v:
Journal of Sound and Vibration. 336:46-61
The acoustic properties of a wall jet over a hard-walled backward-facing step of aspect ratios 6, 3, 2, and 1.5 are studied using a 24-channel microphone phased array at Mach numbers up to M=0.6. The Reynolds number based on inflow velocity and step
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8b0599f37de9623e46b1c0e6a424fbe
https://doi.org/10.1016/j.jsv.2014.09.008
https://doi.org/10.1016/j.jsv.2014.09.008
Publikováno v:
Journal of Sound and Vibration. 333:3058-3080
This paper experimentally investigates the noise from a large wind turbine (GE 1.5 MW) with a compact microphone array (OptiNav 24) using advanced deconvolution based beamforming methods, such as DAMAS and CLEAN-SC beamforming algorithms, for data re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e8a0c45a1308df8bd95851b45a15f61
https://doi.org/10.1016/j.jsv.2014.02.034
https://doi.org/10.1016/j.jsv.2014.02.034
Publikováno v:
Wind Engineering. 38:73-88
Small wind turbines, which are increasingly being used near residential areas, sound louder than their larger counter parts due to their close proximity to dwellings. Previous noise measurements on small scale wind turbines were performed using singl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::147260d53f163455fcd408d36d7dc74a
https://doi.org/10.1260/0309-524x.38.1.73
https://doi.org/10.1260/0309-524x.38.1.73
Autor:
Xiaodong Shi, Yong Jiang, Ganesh Raman, Hirenkumar Patel, Rakesh C. Ramachandran, Mahesh Krishnamurthy
Publikováno v:
Wind Engineering. 38:89-100
The main goal of this study was to separate and evaluate the noise contribution of each sub-component of a small scale wind turbine drive train that contributes to the overall mechanical noise inside the nacelle of a small (8 kW) wind turbine. The ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d9eaaf26085bc69fee130fc49162ef4
https://doi.org/10.1260/0309-524x.38.1.89
https://doi.org/10.1260/0309-524x.38.1.89
Autor:
Rakesh C. Ramachandran, Ganesh Raman
Publikováno v:
International Journal of Flow Control. 5:1-24
There is a critical need to develop reliable high control authority flow control actuators for high speed applications. This paper introduces a novel high control authority actuator in the form of a miniature shock tube actuator. Two types of shock t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5d2e554e8804498cca733a602a4e42c
https://doi.org/10.1260/1756-8250.5.1.1
https://doi.org/10.1260/1756-8250.5.1.1
Publikováno v:
Wind Engineering. 36:589-604
Locating the dominant noise sources on a wind turbine is an important problem in designing and developing low noise wind turbines. Previously very large microphone arrays were used to locate these sources. The primary focus of this paper is to show t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2db52cb814cc66aa02f4b8c8f1a492be
https://doi.org/10.1260/0309-524x.36.5.589
https://doi.org/10.1260/0309-524x.36.5.589
Autor:
Ganesh Raman, Rakesh C. Ramachandran
Publikováno v:
20th AIAA/CEAS Aeroacoustics Conference.
Previously it was shown that a compact microphone array was sufficient to resolve noise sources on a wind turbine while using advanced deconvolution algorithms. It was found that deconvolution approach for the mapping of acoustic sources (DAMAS) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::026b4edcb76b7855ea4b14a2080dbae8
https://doi.org/10.2514/6.2014-2914
https://doi.org/10.2514/6.2014-2914
Publikováno v:
19th AIAA/CEAS Aeroacoustics Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a8985567df0b7855183e43d4d243ac0
https://doi.org/10.2514/6.2013-2057
https://doi.org/10.2514/6.2013-2057
Publikováno v:
19th AIAA/CEAS Aeroacoustics Conference.
A new deconvolution strategy for aeroacoustic beamforming based on linear programming (LP) is introduced. Results of an aeroacoustic test show that it produces virtually the same results as DAMAS in much less time. DAMAS, DAMAS2 and LP display superr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4034ddd2c82c431f6aa9e95c58a37429
https://doi.org/10.2514/6.2013-2210
https://doi.org/10.2514/6.2013-2210