Název: Investigation of Vstol Aircraft Engine Surge Due to Ground Vortex Ingestion
Autoři: Lepičovský, Jan ; duPont, A. A.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Biennial Symposium on Measuring Techniques in Turbomachinery /24./, Praha (CZ), 20180829
Rok: 2018
Jazyk: eng
Abstrakt: An investigation of flow instabilities in the inlet ducts of a two-engine vertical takeoff and landing aircraft DP-1C is described in this paper. The engines stalled during run ups while the aircraft was perated on the ground. These pop stalls occurred at relatively low power levels, sometimes as low as 60% of the engine full speed. The main focus of the paper is on instrumentation of the aircraft intake ducts and on high speed recording the flow instabilities during the engine rotating stall and surge events. The recorded data sets show the history of speeds of both engines and the associated history of pressure changes recorded by six pressure transducers installed in both inlet ducts. Analysis of recorded unsteady pressure data indicated that engine stalls were evoked by a sudden ingestion of a vortex generated between the two streams moving in the opposite directions: hot gas flow close to the ground streaming outbound from the main nozzle and inbound flow above in the engine inlets. The engine stall problem was eventually resolved by modifying the overall flow pattern at the engine intake lips by deploying a suitably shaped double scoop flow deflector.
Klíčová slova: engine surge; ground vortex; vortex ingestion; VSTOL aircraft
Číslo projektu: TH02020057 (CEP)
Poskytovatel projektu: GA TA ČR
Zdrojový dokument: Proceedings of XXIV Biennial Symposium on Measuring Techniques in Turbomachinery, ISBN 978-80-87012-68-0
Poznámka: Související webová stránka: http://www.meastechturbo.com/index.php/paper-archives/2418-prague-2018/item/download/452_71b3d0e61cbf8892a45e83f1f9168380

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0293070

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-391496


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference