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Cloud Encounter Impact on Operational and Economical Effectiveness of Hybrid Laminar Flow Control

Pohya, Ahmad Ali and Wicke, Kai and Risse, Kristof and Linke, Florian and Lau, Alexander and Lührs, Benjamin and Swaid, Majed (2019) Cloud Encounter Impact on Operational and Economical Effectiveness of Hybrid Laminar Flow Control. Journal of Aircraft, 4 (56), pp. 1513-1523. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.C035205. ISSN 0021-8669.

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Official URL: https://arc.aiaa.org/doi/10.2514/1.C035205


Hybrid laminar flow control (HLFC) on transport aircraft is one of many promising fuel reduction technologies. However, due to high sensitivities of HLFC toward operational boundary conditions, estimations of its overall benefit are usually afflicted with large uncertainties. Among the critical environmental factors is the degradation of laminarity when flying through clouds at high altitudes. This paper provides an assessment on operational and economical effectiveness of HLFC aircraft with a detailed inclusion of the cloud encounter effect in three steps. First the expected time in cloud (TIC) in a real route network with cloud data given by the European Centre for Medium-Range Weather Forecast is analyzed, yielding an average TIC of 10%. Subsequently, HLFC fuel efficiency with and without considering the cloud effect on mid- to long-range aircraft is dealt with. Results show an average drop of fuel benefit from 12.8 to 12.0% due to clouds. The effectiveness of lateral route optimization to reduce the impact of clouds is investigated in the last analysis. Outcomes show that these mitigation strategies are economically beneficial for few cases only. The overall picture confirms that cloud encounter must not be neglected when assessing aircraft with HLFC.

Item URL in elib:https://elib.dlr.de/132716/
Document Type:Article
Title:Cloud Encounter Impact on Operational and Economical Effectiveness of Hybrid Laminar Flow Control
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Pohya, Ahmad AliAhmad.Pohya (at) dlr.dehttps://orcid.org/0000-0002-2734-3199
Wicke, KaiKai.Wicke (at) dlr.deUNSPECIFIED
Risse, KristofKristof.Risse (at) dlr.deUNSPECIFIED
Linke, FlorianFlorian.Linke (at) dlr.deUNSPECIFIED
Lau, AlexanderAlexander.Lau (at) dlr.deUNSPECIFIED
Lührs, BenjaminBenjamin.Luehrs (at) dlr.deUNSPECIFIED
Swaid, MajedMajed.Swaid (at) dlr.deUNSPECIFIED
Date:5 March 2019
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.C035205
Page Range:pp. 1513-1523
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:HLFC, Cloud Encounter, Degradation, Mitigation
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)
Location: Hamburg
Institutes and Institutions:Institute of Maintenance, Repair and Overhaul > Product Life Cycle Management
Air Transport Operations
Deposited By: Pohya, M.Sc. Ahmad Ali
Deposited On:16 Dec 2019 09:40
Last Modified:07 Mar 2022 14:54

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