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Experimental Study of Boundary-Layer Ingestion into a Diverterless S-Duct Intake

Rein, Martin und Koch, Stefan (2015) Experimental Study of Boundary-Layer Ingestion into a Diverterless S-Duct Intake. AIAA Journal, 53 (11), Seiten 3487-3491. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.J053902. ISSN 0001-1452.

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Offizielle URL: http://arc.aiaa.org/doi/pdf/10.2514/1.J053902

Kurzfassung

AN INGESTION of fluid of reduced velocity like that of wake flows and boundary layers can increase the efficiency of engines [1,2]. This is exploited with torpedoes, where the propulsion system is usually placed in the wake of the body. Recent studies [3–6] have shown that benefits resulting from an ingestion of boundary layers are also possible in the case of blended-wing bodies, with the distortion of the flow and reduced stagnation pressures at the engine face being the main problem. The topic of this Note is a parametric study of the combined effect on flowconditions at the engine face of boundary-layer ingestion into intakes and an S-duct diffuser. Previous studies used boundary layers formed on the walls of a wind tunnel [7]. In this study, a boundary layer of well-defined thickness is formed on a flat plate within the wind tunnel. The intake is placed at a certain distance from the leading edge of the plate. By changing the length of the plate, the boundary-layer thickness can be varied independently of other flow properties. Intake performance is assessed based on circumferential distortions and losses in total pressure at the aerodynamic interface plane (AIP). Experiments were performed in the cryogenic blowdown tunnel–Göttingen (DNW-KRG) of the German–Dutch Wind Tunnels. Impulse facilities like the DNW-KRG are well suited for intake tests. For example, air intake studies have been successfully performed in a light piston tunnel for which the test time is on the order of 1 s, similar to that of the DNW-KRG [8]. The blowdown tunnel DNW-KRG allows the variation of the Reynolds and Mach numbers, as well as boundary-layer thickness and mass flux through the intake independent of each other.

elib-URL des Eintrags:https://elib.dlr.de/99028/
Dokumentart:Zeitschriftenbeitrag
Titel:Experimental Study of Boundary-Layer Ingestion into a Diverterless S-Duct Intake
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Rein, Martinmartin.rein (at) dlr.dehttps://orcid.org/0000-0002-2670-2815NICHT SPEZIFIZIERT
Koch, Stefanstefan.koch (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2015
Erschienen in:AIAA Journal
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:53
DOI:10.2514/1.J053902
Seitenbereich:Seiten 3487-3491
Verlag:American Institute of Aeronautics and Astronautics (AIAA)
Name der Reihe:Technical Notes
ISSN:0001-1452
Status:veröffentlicht
Stichwörter:intake, boundary layer ingestion, diverterless intake, s-duct
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Militärische Technologien (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen
Hinterlegt von: Micknaus, Ilka
Hinterlegt am:17 Nov 2015 14:45
Letzte Änderung:28 Nov 2023 09:04

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