Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Dennis Vechtel"'
Autor:
Dennis Vechtel, Georgi Atanasov, Mathias Noe, Nir Kastner, Martin Hepperle, Stefan Biser, Martin Boll, Mykhaylo Filipenko, Dennis Keller
Electric propulsion systems are considered as one possibility to reach the ambitious goals of the European Union’s Flightpath 2050 with regards to greenhouse gas emissions and noise. It has been claimed in several publications that Distributed Elec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce174c042e8b3627dd726b6ce776490a
https://doi.org/10.2514/6.2020-3592
https://doi.org/10.2514/6.2020-3592
In free air aircraft wake vortices descend due to their mutually induced velocities. In ground proximity, however, they are hindered to descent, which increases the encounter risk significantly. Recent investigations showed that vortex decay in groun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4657ecf16b6656f67528cb4dfe5b8c06
https://elib.dlr.de/131572/
https://elib.dlr.de/131572/
Publikováno v:
CEAS Aeronautical Journal. 9:735-746
Wake vortices are an inevitable result of lift generation and can pose a threat to any aircraft, which accidentally encounters the wake of another aircraft. However, wake vortices can also be used in a beneficial way. Due to its rotational direction,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fde201841bef06118a4dcbab0e8c238e
https://doi.org/10.1007/s13272-018-0318-z
https://doi.org/10.1007/s13272-018-0318-z
Publikováno v:
Journal of Aircraft. 54:1802-1813
Wake-vortex encounter reports as well as simulations show a significantly higher encounter probability during landing shortly before touchdown in comparison to other flight phases. This is caused, ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf47f1c272c67b86829b3aad7cce67c5
https://doi.org/10.2514/1.c033995
https://doi.org/10.2514/1.c033995
Publikováno v:
CEAS Aeronautical Journal. 5:293-303
Several crosswind-related incidents show that landing under heavy crosswind conditions can be challenging for pilots and may pose a threat to aviation or at least lead to higher pilot workload and/or irregularities in operations. For transport aircra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1d7c04417b21a641a682ea1259419e1
https://doi.org/10.1007/s13272-014-0107-2
https://doi.org/10.1007/s13272-014-0107-2
Autor:
Dennis Vechtel
Publikováno v:
The Aeronautical Journal. 117:997-1018
During the decay process the shape of wake vortices changes significantly which has an influence on the encounter characteristics, hence on the encounter hazard. In order to evaluate the influence of vortex deformation on the wake encounter hazard, i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37a5eb84ca0b6c00c7942c67a8ba5f2b
https://doi.org/10.1017/s0001924000008654
https://doi.org/10.1017/s0001924000008654
Autor:
Dennis Vechtel
A simulation study was conducted in order to investigate the influence of vortex deformation on wake encounter characteristics. Wake vortices tend to be strongly deformed during the decay process, depending on the atmospheric conditions in terms of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c398c6b5c9140c151b892d8f260d5aa6
https://doi.org/10.1017/aer.2016.14
https://doi.org/10.1017/aer.2016.14
Performance of on-board wake vortex prediction systems employing various meteorological data sources
Publikováno v:
Scopus-Elsevier
In this work the accuracy of wake–vortex predictions of DLR’s wake encounter avoidance and advisory system (WEAA) is analyzed by means of data gathered from a flight test campaign in April 2014. The system is based on airborne data exchange betwe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a3117144109d5256f948218f2e29f42
https://elib.dlr.de/102369/
https://elib.dlr.de/102369/
Publikováno v:
6th AIAA Atmospheric and Space Environments Conference.
DLR is working on a Wake Encounter Advisory & Avoidance (WEAA) system to facilitate pilots’ awareness of the wake vortex situation. The system identifies impending wake conflicts and allows the pilots to avoid potentially dangerous wake vortex enco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d498f3557c0eda817552ee8ea5aa731a
https://doi.org/10.2514/6.2014-2333
https://doi.org/10.2514/6.2014-2333
Autor:
Dennis Vechtel
A flight simulator study has been carried out to evaluate the performance of modern flight control systems encountering curved wake vortices. During the decay process the shape of wake vortices alters significantly which has an influence on the encou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7c081b9b4c5de3edec78ace63f6b685
https://doi.org/10.1017/s0001924000006849
https://doi.org/10.1017/s0001924000006849