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EFFECTS OF ROTOR CONTAMINATION ON GYROPLANE FLIGHT PERFORMANCE

Duda, Holger and Sachs, Falk and Seewald, Jörg and Rohardt, Claas-Hinrik (2015) EFFECTS OF ROTOR CONTAMINATION ON GYROPLANE FLIGHT PERFORMANCE. 41st European Rotorcraft Forum 2015, 31. Aug. - 04. Sep. 2015, München.

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Abstract

This paper describes the effects of rotor contamination on gyroplane flight performance such as its influence on propeller thrust required for cruise flight and takeoff distance. It is known from flight practice that rotor contamination due to insects degrades the flight performance of gyroplanes significantly. By flight trials with an MTOsport gyroplane this degradation has been quantified: in order to maintain altitude at 60 kt airspeed the engine rotational speed has to be increased by about 200 rpm due to the rotor contamination. Considering these experimental data in the simulation model shows that this means a performance degradation of about 14 %. In order to understand this significant effect an analysis has been conducted connecting these flight test results with the degradation of the airfoil performance due to contamination. The NACA 8-H-12 airfoil characteristics have been determined using XFOIL for the clean and the contaminated case. The drag coefficient computed with a fixed transition point near the leading edge (contaminated case) is almost doubled in the relevant region of lift coefficients compared to the free transition point calculation (clean case). Utilizing these aerodynamic characteristics within the overall MTOsport flight simulation model affirms the degradation measured in flight. Hence the computational results are considered to be valid and the simulation model can be applied to investigate potential flight performance improvements of future gyroplanes. Finally a simulation study of the takeoff performance with clean and contaminated rotor is presented indicating that the takeoff distance also increases by more than 16 %.

Item URL in elib:https://elib.dlr.de/98019/
Document Type:Conference or Workshop Item (Speech)
Title:EFFECTS OF ROTOR CONTAMINATION ON GYROPLANE FLIGHT PERFORMANCE
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Duda, HolgerHolger.Duda (at) dlr.deUNSPECIFIED
Sachs, FalkFalk.Sachs (at) dlr.deUNSPECIFIED
Seewald, Jörgjoerg.seewald (at) dlr.deUNSPECIFIED
Rohardt, Claas-HinrikClaas-Hinrik.Rohardt (at) dlr.deUNSPECIFIED
Date:2 September 2015
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Gyrocopter, Autogiro, Rotor, Aerodynamics, Flight Performance
Event Title:41st European Rotorcraft Forum 2015
Event Location:München
Event Type:international Conference
Event Dates:31. Aug. - 04. Sep. 2015
Organizer:DGLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Human factors and safety in Aeronautics
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Flight Dynamics and Simulation
Deposited By: Duda, Holger
Deposited On:22 Sep 2015 14:47
Last Modified:31 Jul 2019 19:54

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