Zobrazeno 1 - 10
of 25
pro vyhledávání: '"D. Douglas Boyd"'
Autor:
Nikolas S. Zawodny, D. Douglas Boyd
Publikováno v:
Journal of the American Helicopter Society. 65:1-17
In this study, acoustic measurements of a hover condition are taken on isolated rotor–airframe configurations representative of small-scale, rotary-wing unmanned aircraft systems (UAS). Each rotor–airframe configuration consists of two fixed-pitc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::134f9c899e0217f83761935417af4fd7
https://doi.org/10.4050/jahs.65.012007
https://doi.org/10.4050/jahs.65.012007
Publikováno v:
AIAA Scitech 2021 Forum.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c93b3770a270623eb6d4d8b02ddeace
https://doi.org/10.2514/6.2021-0714
https://doi.org/10.2514/6.2021-0714
Publikováno v:
AIAA Scitech 2021 Forum.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1035593deb9bc46208c0803ba76edfcd
https://doi.org/10.2514/6.2021-0587
https://doi.org/10.2514/6.2021-0587
Autor:
Robert T. Biedron, Sung N. Jung, D. Douglas Boyd, Buvana Jayaraman, Marilyn J. Smith, Byung-Young Min, Berend G. van der Wall, James D. Baeder, Joon W. Lim
Publikováno v:
CEAS Aeronautical Journal. 4:345-372
Over the past decade, there have been significant advancements in the accuracy of rotor aeroelastic simulations with the application of computational fluid dynamics methods coupled with computational structural dynamics codes (CFD/CSD). The HART II i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cab620e2c2b803ce1919e5116f3ca02
https://doi.org/10.1007/s13272-013-0078-8
https://doi.org/10.1007/s13272-013-0078-8
Autor:
Joon W. Lim, D. Douglas Boyd, Sung N. Jung, James D. Baeder, Marilyn J. Smith, Berend G. van der Wall, Joëlle Bailly
Publikováno v:
CEAS Aeronautical Journal. 4:223-252
Significant advancements in computational fluid dynamics (CFD) and their coupling with computational structural dynamics (CSD, or comprehensive codes) for rotorcraft applications have been achieved recently. Despite this, CSD codes with their enginee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b3a6c2482b38349523627e712b84d25
https://doi.org/10.1007/s13272-013-0077-9
https://doi.org/10.1007/s13272-013-0077-9
Publikováno v:
54th AIAA Aerospace Sciences Meeting.
In an effort to mitigate next-generation fuel efficiency and environmental impact concerns for aviation, open rotor propulsion systems have received renewed interest. However, maintaining the high propulsive efficiency while simultaneously meeting no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f2241f587d7bebb69b597b2400a7458
https://doi.org/10.2514/6.2016-1271
https://doi.org/10.2514/6.2016-1271
Autor:
Carl R. Russell, Larry A. Young, Gloria K. Yamauchi, Wayne Johnson, D. Douglas Boyd, Susan A. Gorton, Christopher A. Snyder, Lee W. Kohlman
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b8dc93be6b7ad2861186c1ead30cb50
https://doi.org/10.1002/9780470686652.eae1009
https://doi.org/10.1002/9780470686652.eae1009
Assessment of Geometry and In-Flow Effects on Contra-Rotating Open Rotor Broadband Noise Predictions
Publikováno v:
53rd AIAA Aerospace Sciences Meeting.
Application of previously formulated semi-analytical models for the prediction of broadband noise due to turbulent rotor wake interactions and rotor blade trailing edges is performed on the historical baseline F31/A31 contra-rotating open rotor confi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74b706c7aab63ef4f7938b4f8a256a13
https://doi.org/10.2514/6.2015-0741
https://doi.org/10.2514/6.2015-0741
Publikováno v:
Journal of the American Helicopter Society. 45:63-79
This paper presents a status of non-CFD aeroacoustic codes at NASA Langley Research Center for the prediction of helicopter harmonic and Blade-Vortex Interaction (BVI) noise. The prediction approach incorporates three primary components: CAMRAD.Mod1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5364c75b0f299895b4f06e87c72c911d
https://doi.org/10.4050/jahs.45.63
https://doi.org/10.4050/jahs.45.63
Autor:
Thomas F. Brooks, Roland Kube, D. Douglas Boyd, Klaus J. Schultz, Wolf R. Splettstoesser, Olivier Streby, Earl R. Booth, Georg Niesl
Publikováno v:
Journal of Aircraft. 31:1341-1349
A noise study using an aeroelastically scaled BO-105 rotor was conducted in the German-Dutch Wind Tunnel to examine the use of higher harmonic control (HHC) of blade pitch to reduce impulsive blade-vortex interaction (BVI) noise. The noise directivit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bad8b625810431d72d35fecd83a131e
https://doi.org/10.2514/3.46657
https://doi.org/10.2514/3.46657