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Flight Testing on Ground - The Laminar Wing Leading Edge Ground Based Demonstrator

Steffen, Olaf und Buggisch, Manuel und Kappel, Erik und Köke, Hardy und Meyer, Patrick und Hühne, Christian (2019) Flight Testing on Ground - The Laminar Wing Leading Edge Ground Based Demonstrator. Deutscher Luft- und Raumfahrtkongress DLRK 2019, 2019-09-30 - 2019-10-02, Darmstadt, Germany.

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Kurzfassung

Economic needs and a growing ecological awareness demand for a cut in aircraft fuel consumption to reduce CO2 emission and operating cost. A long discussed approach is to implement areas of laminar flow on surfaces of transport aircraft. The reduced friction drag of a natural laminar flow (NLF) wing can lead to a reduction in fuel consumption and thus reduction of CO2 emissions of up to 8%. However, laminar flow is sensitive to surface disturbances and requires specific shapes and surface quality, preventing the adaptation of “regular” turbulent wings. Structural features like steps, gaps and surface waviness can cause early laminar/turbulent transition, excluding conventional designs of aircraft wings from laminar flow application. Most of the existing research performed so far was dedicated to verification or determination of aerodynamic parameters. Structures used in these investigations were not representative, like laminar gloves on conventional wing structures. Thus, despite the progress in laminar flow research, there is still a lack in experience of building and especially validating realistic structures designed for the laminar flow environment. Before flight testing of new structures a proof of their operational capabilities on ground is desirable. Under those boundary conditions, a laminar wing leading edge and a suitable test stand design method were developed. A multi-material leading edge concept consisting of CFRP as structural material and an integrally bonded erosion shielding (steel foil) was developed. The leading edge was designed in detail, a manufacturing process developed and a 2.3 m span demonstrator with full-complexity built. The leading edge together with its attachment elements is joined with a wing box to form a ground based demonstrator. To demonstrate compliance with laminar flow requirements under cruise flight conditions and to demonstrate interchangeability of the leading edge under operational on-ground conditions, a novel, smart test stand was designed. For those “wing on ground” and “cruise flight” test cases target geometries were derived in a full wing FE-simulation and used as target shapes for the actuation within the test stand. Wing box spar and ribs as well as actuator attachment positions were optimized to recreate realistic ground based demonstrator surface deformations in a laboratory environment using discrete load introduction.

elib-URL des Eintrags:https://elib.dlr.de/134022/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Flight Testing on Ground - The Laminar Wing Leading Edge Ground Based Demonstrator
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Steffen, Olafolaf.steffen (at) dlr.dehttps://orcid.org/0000-0001-7838-1219NICHT SPEZIFIZIERT
Buggisch, ManuelManuel.Buggisch (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Kappel, ErikErik.Kappel (at) dlr.dehttps://orcid.org/0000-0002-8760-8451NICHT SPEZIFIZIERT
Köke, HardyHardy.Koeke (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Meyer, PatrickPatrick.Meyer (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hühne, Christianchristian.huehne (at) dlr.dehttps://orcid.org/0000-0002-2218-1223NICHT SPEZIFIZIERT
Datum:1 Oktober 2019
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Laminarhaltung, laminar, laminar flow, NLF, natural laminar flow, Composite, CFK, CFRP, Flügelvorderkante, Leading Edge
Veranstaltungstitel:Deutscher Luft- und Raumfahrtkongress DLRK 2019
Veranstaltungsort:Darmstadt, Germany
Veranstaltungsart:nationale Konferenz
Veranstaltungsbeginn:30 September 2019
Veranstaltungsende:2 Oktober 2019
Veranstalter :Deutsche Gesellschaft für Luft- und Raumfahrt
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 - Strukturen und Werkstoffe (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Funktionsleichtbau
Institut für Faserverbundleichtbau und Adaptronik > Faserverbundtechnologie
Hinterlegt von: Steffen, Olaf
Hinterlegt am:10 Feb 2020 07:22
Letzte Änderung:24 Apr 2024 20:37

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