Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Christoph Fritzsche"'
Publikováno v:
Data in Brief, Vol 52, Iss , Pp 109825- (2024)
The very soft and flow-permeable plumage is among the special adaptations of the owl that the silent flight is attributed to. Using a specially designed apparatus that provides a low-speed volume flow of air through a small sample of porous material,
Externí odkaz:
https://doaj.org/article/b0ab2c16514a4468b41f30386d315191
The infrasound levels due to the blade-tower interaction generated by a wind turbine in the publication by Pilger and Ceranna (JSV, Vol. 388, pp. 188-200, 2017) have to be corrected to be interpreted as sound pressure level. Also, the electrical powe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b53826d63260ed25df76146c75e51a0
http://arxiv.org/abs/2102.01401
http://arxiv.org/abs/2102.01401
Publikováno v:
Acta Acustica united with Acustica. 99:139-153
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fced8ef6a3ae5f9998a94bd0cf5eebd3
https://doi.org/10.3813/aaa.918598
https://doi.org/10.3813/aaa.918598
Publikováno v:
Experiments in Fluids. 48:291-308
Owls are commonly known for their quiet flight, enabled by three adaptions of their wings and plumage: leading edge serrations, trailing edge fringes and a soft and elastic downy upper surface of the feathers. In order to gain a better understanding
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8847e8c20fbf1804961669fe0b6e608b
https://doi.org/10.1007/s00348-009-0739-x
https://doi.org/10.1007/s00348-009-0739-x
Publikováno v:
Applied Acoustics. 70:1073-1080
The aeroacoustic wind tunnel at Brandenburg University of Technology at Cottbus is a newly commissioned research facility for the experimental study of sound generation from bodies immersed in a fluid flow. The paper discusses the design criteria for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6dcc10b7193ec3b62cc6d15da35ee891
https://doi.org/10.1016/j.apacoust.2009.02.009
https://doi.org/10.1016/j.apacoust.2009.02.009
Publikováno v:
Scopus-Elsevier
wings are characterized in the study as technical airfoils in terms of their acoustic and aerodynamic performance. The experiments took place in an aeroacoustic open jet wind tunnel using microphone array measurement technique and deconvolution beamf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12b74074b7f7921c91b4a17a8f7914a7
https://doi.org/10.2514/6.2012-2230
https://doi.org/10.2514/6.2012-2230
Publikováno v:
Notes on Numerical Fluid Mechanics and Multidisciplinary Design ISBN: 9783642283017
Inspired by the results from acoustic measurements on flying owls and prepared owl wings that support the thesis of the silent flight of owls, measurements were conducted on technical airfoils made from open-porous, flow-permeable materials, characte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc90a1e7713fefc5bde9960839fd4c39
https://doi.org/10.1007/978-3-642-28302-4_21
https://doi.org/10.1007/978-3-642-28302-4_21
Publikováno v:
Scopus-Elsevier
Mostgeneraofowls(Strigiformes)havetheabilityto flysilently.Themechanismsofthesilent flightoftheowlhave been the subject of scientific interest for many decades. The results from studies in the past are discussed in detail in thispaperandtherationalef
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12f84138f02d4a2cf59b698721687cca
https://doi.org/10.2514/6.2010-3991
https://doi.org/10.2514/6.2010-3991
Publikováno v:
Angewandte Makromolekulare Chemie. 67:99-116
Das nach DIN 53157 bekannte und der Lackprufung dienende Pendelgerat wurde fur diese Messungen mit einer Heizung versehen und fur Untersuchungen an Kunststoffen eingesetzt. Die erhaltene Mesgrose, der Pendelwert, erweist sich als eine geeignete und l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b847647e819e9776de3cd0f493f84b2
https://doi.org/10.1002/apmc.1978.050670108
https://doi.org/10.1002/apmc.1978.050670108
Publikováno v:
Scopus-Elsevier
The present paper describes acoustic and hot–wire measurements that were done in the aeroacoustic wind tunnel at the Brandenburg University of Technology Cottbus on various SD7003–type airfoils made of different porous (flow permeable) materials.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2803b900235707615a7027409d748c11
http://www.scopus.com/inward/record.url?eid=2-s2.0-78149443745&partnerID=MN8TOARS
http://www.scopus.com/inward/record.url?eid=2-s2.0-78149443745&partnerID=MN8TOARS