Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Bernhard Semlitsch"'
Publikováno v:
Energies, Vol 16, Iss 6, p 2737 (2023)
In an agile power grid environment, hydroelectric power plants must operate flexibly to follow the demand. Their wide operating range and high part-load efficiencies allow for multi-injector Pelton turbines to fulfil these demands as long as the wate
Externí odkaz:
https://doaj.org/article/706f305bc2cd4cdcb1b78b5be0f675eb
Autor:
Bernhard Semlitsch, Mihai Mihăescu
Publikováno v:
Aerospace, Vol 8, Iss 12, p 369 (2021)
The ability to manipulate shock patterns in a supersonic nozzle flow with fluidic injection is investigated numerically using Large Eddy Simulations. Various injector configurations in the proximity of the nozzle throat are screened for numerous inje
Externí odkaz:
https://doaj.org/article/a6c381dfe2b24496857a4b4e57d81040
Autor:
Bernhard Semlitsch
Publikováno v:
Applied Acoustics. 204:109236
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f54d5c35915055e301ad913fa8e34c4d
https://doi.org/10.1016/j.apacoust.2023.109236
https://doi.org/10.1016/j.apacoust.2023.109236
Autor:
Mihai Mihaescu, Bernhard Semlitsch
Publikováno v:
Aerospace, Vol 8, Iss 369, p 369 (2021)
Aerospace; Volume 8; Issue 12; Pages: 369
Aerospace; Volume 8; Issue 12; Pages: 369
The ability to manipulate shock patterns in a supersonic nozzle flow with fluidic injection is investigated numerically using Large Eddy Simulations. Various injector configurations in the proximity of the nozzle throat are screened for numerous inje
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b24aacc1c8aea1cd0eb7dc8f1498259
https://www.mdpi.com/2226-4310/8/12/369
https://www.mdpi.com/2226-4310/8/12/369
Publikováno v:
Journal of Fluid Mechanics. 893
The generation mechanism of screech harmonics in supersonic exhausts is revealed using shadowgraph imaging and acoustic far-field measurements for a rectangular, high aspect-ratio nozzle. The coherent information associated with screech and its harmo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c5761f650d1b34742763ec8baa533ee
https://doi.org/10.1017/jfm.2020.233
https://doi.org/10.1017/jfm.2020.233
Autor:
Ephraim Gutmark, Bernhard Semlitsch, Jyothishkumar, Matthieu Gancedo, Mihai Mihaescu, Laszlo Fuchs
Turbochargers are commonly used in automotive engines to increase the internal combustion engine performance during off design operation conditions. When used, a most wide operation range for the turbocharger is desired, which is limited on the compr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ca45c8b2c849250aeb993f4cee776f4
Publikováno v:
Flow, Turbulence and Combustion
Flow instabilities such as Rotating Stall and Surge limit the operating range of centrifugal compressors at low mass-flow rates. Employing compressible Large Eddy Simulations (LES), their generation mechanisms are exposed. Toward low mass-flow rate o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::168d026a766c3962feded5a528bd5dd7
https://doi.org/10.1007/s10494-017-9877-z
https://doi.org/10.1007/s10494-017-9877-z
Double shock diamonds establish in the exhaust of modular convergent-divergent nozzles. These consist of two shock structures; one originating from the nozzle throat and another from its exit. Analyzing the shock pattern developing for different flui
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eff7b6bdb7bcbe572ce51797326bd23c
https://www.repository.cam.ac.uk/handle/1810/290291
https://www.repository.cam.ac.uk/handle/1810/290291
Understanding the nature of the unsteady flow at the combustor exit is required to accurately simulate time dependent phenomena in the turbine entry, such as indirect noise generation. Using Large Eddy Simulations of the combustion process in a reali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c62c16f79c15ffa4305c56c00c943388
https://www.repository.cam.ac.uk/handle/1810/290788
https://www.repository.cam.ac.uk/handle/1810/290788
The effect of stator clocking on the acoustic noise generation characteristics in an axial high-pressure compressor is analysed. A realistic geometry with one-and-a-half stages is assessed using high fidelity and low-order numerical methods for diffe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecdbe58d7bca8e3bf42c22291bbb1b1d