Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Woutijn J. Baars"'
Publikováno v:
Flow, Vol 3 (2023)
The unsteady flow behaviour of two side-by-side rotors in ground proximity is experimentally investigated. The rotors induce a velocity distribution interacting with the ground causing the radial expansion of the rotor wakes. In between the rotors, a
Externí odkaz:
https://doaj.org/article/8ec19575f7074d4ca3febf906c3b90c7
Publikováno v:
Experiments in Fluids: experimental methods and their applications to fluid flow, 63(5)
Abstract This work combines the latest advancements in time marching of 3D vector fields from tomographic particle image velocimetry, with an adapted version of Lighthill’s formulation, for the prediction of far-field jet noise. Three-dimensional v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d2c91e1c8cf2eca2077ad093c318588
https://doi.org/10.1007/s00348-022-03436-3
https://doi.org/10.1007/s00348-022-03436-3
Publikováno v:
AIAA Journal: devoted to aerospace research and development, 60(7)
AIAA Journal
AIAA Journal
An experimental investigation is conducted to study the aerodynamic behavior of a two-rotor system in ground proximity. The counter-rotating rotors are placed side-by-side in the hovering condition. The time-averaged and unsteady flow behavior is stu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f8c0c47ba503adbb0279c2fa00a6a95
https://doi.org/10.2514/1.j061105
https://doi.org/10.2514/1.j061105
Publikováno v:
Journal of Fluid Mechanics, 942
A large-scale spanwise and wall-normal array of sonic anemometers in the atmospheric surface layer is used to acquire all three components of instantaneous fluctuating velocity as well as temperature in a range of stability conditions. These data per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e902c2cf6d29f970bced58882f5c0835
http://resolver.tudelft.nl/uuid:c148e439-b793-40ae-8e10-bb90160b71d2
http://resolver.tudelft.nl/uuid:c148e439-b793-40ae-8e10-bb90160b71d2
Publikováno v:
Journal of Fluid Mechanics, 929
A quantitative assessment of the acoustic source field produced by a laboratory-scale heated jet with a gas dynamic Mach number of 1.55 and an acoustic Mach number of 2.41 is performed using arrays of microphones that are traversed across the axial a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b26e1901eaab29beb171b9f1aba2f941
https://doi.org/10.1017/jfm.2021.837
https://doi.org/10.1017/jfm.2021.837
Publikováno v:
AIAA Scitech 2021 Forum: 11–15 & 19–21 January 2021Virtual/online event
AIAA Scitech 2021 Forum
Scopus-Elsevier
AIAA Scitech 2021 Forum
Scopus-Elsevier
This paper describes a methodology to quantify inter-frequency modulation in the acoustic field of a small-scale rotor. How the blade passing frequency modulates the intensity of the higher-frequency (broadband) noise content is of specific interest,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c6f892e24969c201c81f24c94398060
https://doi.org/10.2514/6.2021-0713
https://doi.org/10.2514/6.2021-0713
Autor:
Ramis Örlü, Philipp Schlatter, Amirreza Rouhi, Nicholas Hutchins, Ivan Marusic, Milad Samie, Woutijn J. Baars
Publikováno v:
International Journal of Heat and Fluid Flow, 86
Opposition-control of the energetic cycle of near wall streaks in wall-bounded turbulence, using numerical approaches, has shown promise for drag reduction. For practical implementation, real-time opposition control is only realizable if there is a d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c432d4adf8e61142321a5bc61a74489d
http://resolver.tudelft.nl/uuid:9df97880-4b71-451b-9582-576c22025a22
http://resolver.tudelft.nl/uuid:9df97880-4b71-451b-9582-576c22025a22
Publikováno v:
Pedersen, M T, Murray, N E & Baars, W J 2020, Modeling supersonic jet noise exposure using a data-informed wave packet approach . in AIAA AVIATION 2020 FORUM . American Institute of Aeronautics and Astronautics Inc. (AIAA), AIAA AVIATION 2020 FORUM, AIAA AVIATION 2020 FORUM, Virtual, Online, 15/06/2020 . https://doi.org/10.2514/6.2020-2605
This paper outlines a modeling approach of supersonic jet noise exposure for full-scale flight scenarios, based on laboratory data of a supersonic jet. Such a modeling capability allows for quantifying the environmental noise impact of a jet engine n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32c8b7e5be43483f7db2814fe13b4174
https://doi.org/10.2514/6.2020-2605
https://doi.org/10.2514/6.2020-2605
Autor:
Pietro Paolo Ciottoli, Woutijn J. Baars, Charles E. Tinney, Emanuele Martelli, Matteo Bernardini, L. Saccoccio
Publikováno v:
Journal of Fluid Mechanics, 895
A delayed detached eddy simulation (DDES) of an overexpanded nozzle flow with shock-induced separation is carried out at a Reynolds number equal to 1.7 10^7. The flow unsteadiness, characterised by self-sustained shock oscillations, induces local uns
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ccf0441ee2c914d37e56fbf63537915
https://doi.org/10.1017/jfm.2020.280
https://doi.org/10.1017/jfm.2020.280
Publikováno v:
International Journal of Heat and Fluid Flow. 67:30-41
While large-scale motions are most energetic in the logarithmic region of a high-Reynolds-number turbulent boundary layer, they also have an influence in the inner-region. In this paper we describe an experimental investigation of manipulating the la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::298af130058f4573cef1c3a941d8d835
https://doi.org/10.1016/j.ijheatfluidflow.2017.05.003
https://doi.org/10.1016/j.ijheatfluidflow.2017.05.003