Scaled model testing of rotor hub root-end airfoil shapes

Charles Tierney, Jeff Harris, David Reich, Nicholas A. Jaffa, Sven Schmitz

Research output: Contribution to conferencePaper

Abstract

In order to extend the boundaries of helicopter performance and increase forward-flight speed, it is necessary to reduce the drag on the rotor hub, which can account for as much as 30% of the total parasite drag on the helicopter. Currently, there is limited experimental data available to predict the drag force on new hub configuratio ns. The purpose of this testing is to create a database of lift and drag at various angles of attack to aid in hub design and hub drag prediction. Testing was conducted in the 12 inch-diameter water tunnel at ARL Penn State on four shapes – DBLN 526, 4:1 Ellipse, 3.25:1 Rectangle, and a new Optimized Cambered Shape (OCS) designed at UT Knoxville. Load cell data for lift and drag were obtained for angles of attack from approximately -5 degrees to 5 degrees. Drag data were also calculated using PIV velocity fields. Results are plotted and tabulated for use in future hub drag prediction toolsets.

Original languageEnglish (US)
StatePublished - Jan 1 2019
EventVertical Flight Society's 75th Annual Forum and Technology Display - Philadelphia, United States
Duration: May 13 2019May 16 2019

Conference

ConferenceVertical Flight Society's 75th Annual Forum and Technology Display
CountryUnited States
CityPhiladelphia
Period5/13/195/16/19

Fingerprint

Airfoils
Drag
Rotors
Testing
Angle of attack
Helicopters
Tunnels
Water

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Control and Systems Engineering

Cite this

Tierney, C., Harris, J., Reich, D., Jaffa, N. A., & Schmitz, S. (2019). Scaled model testing of rotor hub root-end airfoil shapes. Paper presented at Vertical Flight Society's 75th Annual Forum and Technology Display, Philadelphia, United States.
Tierney, Charles ; Harris, Jeff ; Reich, David ; Jaffa, Nicholas A. ; Schmitz, Sven. / Scaled model testing of rotor hub root-end airfoil shapes. Paper presented at Vertical Flight Society's 75th Annual Forum and Technology Display, Philadelphia, United States.
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Tierney, C, Harris, J, Reich, D, Jaffa, NA & Schmitz, S 2019, 'Scaled model testing of rotor hub root-end airfoil shapes' Paper presented at Vertical Flight Society's 75th Annual Forum and Technology Display, Philadelphia, United States, 5/13/19 - 5/16/19, .

Scaled model testing of rotor hub root-end airfoil shapes. / Tierney, Charles; Harris, Jeff; Reich, David; Jaffa, Nicholas A.; Schmitz, Sven.

2019. Paper presented at Vertical Flight Society's 75th Annual Forum and Technology Display, Philadelphia, United States.

Research output: Contribution to conferencePaper

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Tierney C, Harris J, Reich D, Jaffa NA, Schmitz S. Scaled model testing of rotor hub root-end airfoil shapes. 2019. Paper presented at Vertical Flight Society's 75th Annual Forum and Technology Display, Philadelphia, United States.