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Discharge Characteristics of Drilled Throttle Orifices in Fibre Reinforced Plastics for an HLFC System

Kilian, Thomas and Forßbohm, Tobias and Seitz, Arne and Flache, Birgit (2017) Discharge Characteristics of Drilled Throttle Orifices in Fibre Reinforced Plastics for an HLFC System. DLRK 2017, 05.-07. Sep. 2017, München, Deutschland.

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A series of test campaigns at DLR's Large Flow Meter (LFM) has been conducted in order to investigate the discharge characteristics of cylindrical throttle orifices, drilled in fibre reinforced plastics, with respect to their diameter and manufacturing imperfections. In hybrid laminar flow control (HLFC) applications following the ALTTA concept those throttle holes interfacing a common plenum to multiple chambers are used to regulate the local amount of suction through the porous wing surface. The work performed aims at the further development and industrialized application of HLFC in an aircraft environment. This question is tackled by the industry-oriented drilling of throttle holes into coupon size flat samples. Drilling parameters allowing a stable and reproducible process were established through optical inspection. The major experimental findings are discussed in this article alongside some general manufacturing recommendations for throttle holes in HLFC applications.

Item URL in elib:https://elib.dlr.de/114302/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Gefördert unter Clean Sky 2.
Title:Discharge Characteristics of Drilled Throttle Orifices in Fibre Reinforced Plastics for an HLFC System
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kilian, ThomasThomas.Kilian (at) dlr.deUNSPECIFIED
Forßbohm, Tobiastobias.forssbohm (at) dlr.dehttps://orcid.org/0000-0003-4920-8585
Seitz, Arnearne.seitz (at) dlr.deUNSPECIFIED
Flache, Birgitbirgit.flache (at) dlr.deUNSPECIFIED
Date:6 September 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Hybrid Laminar Flow Control, Experimental Aerodynamics, Manufacturing, Carbon Fibre Reinforced Plastics (CFRP)
Event Title:DLRK 2017
Event Location:München, Deutschland
Event Type:international Conference
Event Dates:05.-07. Sep. 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old), L - Concepts and Integration (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology
Institute of Composite Structures and Adaptive Systems
Deposited By: Kilian, Thomas
Deposited On:13 Nov 2017 07:31
Last Modified:24 Nov 2017 09:52

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