Renewed interest in propeller propulsion on aircraft
configurations combined with higher propeller loads lead to the question how the effects of the propulsion on model support disturbances
should be accounted for. In this paper, the determination of engine power effects on support interference of sting-mounted models is
demonstrated by a measurement on a four-engine turboprop aircraft.
CFD results on a more generic model are presented in order to clarify
the possible mechanism behind engine power effects on support
interference. The engine slipstream induces a local change in angle
of sideslip at the model sting thereby influencing the sting near-field and far-field effects. Whether or not the net result of these changes
in the disturbance pattern leads to a significant engine power effect depends on the configuration of the wind tunnel model and the test
setup.
[1] B.J.C. Horsten and L.L.M. Veldhuis, Experimental and Numerical Results
on Cavity Effects in Juncture Flow. Conference Proceeding of the 38th Fluid Dynamics Conference and Exhibit, Seattle, Washington, United
States, 2008.
[2] L.L.M. Veldhuis, Support Interference Effects of a Ventral Sting on a
Body of Revolution. A Brief Description of Phase 1. Technical Report
LSW 89-2, Delft University of Technology, Department of Aerospace
Engineering, April 1988.
[3] D. Eckert, Correction of Support Influences on Measurements with Sting
Mounted Wind Tunnel Models. AGARD FDP Conference, Brussels,
Belgium, 1993.
[4] D. Eckert, H.G. Hegen and W. K¨uhn, DNW-s Method to Correct for
Support and Wall Interference Effects on Low Speed Measurements With
a Large Propeller Powered Transport Aircraft Model. Conference Proceeding
of the 25th International Congress of the Aeronautical Sciences, Hamburg, Germany, 2006.
[5] J.K. Nathman, VSAERO, A Code for Calculating the Nonlinear Aerodynamic
Characteristics of Arbitrary Configuration. User Manual Version 7.0, Analytical Methods, Inc., 2003.
[1] B.J.C. Horsten and L.L.M. Veldhuis, Experimental and Numerical Results
on Cavity Effects in Juncture Flow. Conference Proceeding of the 38th Fluid Dynamics Conference and Exhibit, Seattle, Washington, United
States, 2008.
[2] L.L.M. Veldhuis, Support Interference Effects of a Ventral Sting on a
Body of Revolution. A Brief Description of Phase 1. Technical Report
LSW 89-2, Delft University of Technology, Department of Aerospace
Engineering, April 1988.
[3] D. Eckert, Correction of Support Influences on Measurements with Sting
Mounted Wind Tunnel Models. AGARD FDP Conference, Brussels,
Belgium, 1993.
[4] D. Eckert, H.G. Hegen and W. K¨uhn, DNW-s Method to Correct for
Support and Wall Interference Effects on Low Speed Measurements With
a Large Propeller Powered Transport Aircraft Model. Conference Proceeding
of the 25th International Congress of the Aeronautical Sciences, Hamburg, Germany, 2006.
[5] J.K. Nathman, VSAERO, A Code for Calculating the Nonlinear Aerodynamic
Characteristics of Arbitrary Configuration. User Manual Version 7.0, Analytical Methods, Inc., 2003.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:56973", author = "B.J.C. Horsten and L.L.M. Veldhuis", title = "Engine Power Effects on Support Interference", abstract = "Renewed interest in propeller propulsion on aircraft
configurations combined with higher propeller loads lead to the question how the effects of the propulsion on model support disturbances
should be accounted for. In this paper, the determination of engine power effects on support interference of sting-mounted models is
demonstrated by a measurement on a four-engine turboprop aircraft.
CFD results on a more generic model are presented in order to clarify
the possible mechanism behind engine power effects on support
interference. The engine slipstream induces a local change in angle
of sideslip at the model sting thereby influencing the sting near-field and far-field effects. Whether or not the net result of these changes
in the disturbance pattern leads to a significant engine power effect depends on the configuration of the wind tunnel model and the test
setup.", keywords = "CFD, engine power effects, measurements, support interference.", volume = "3", number = "10", pages = "1265-10", }