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Laser Velocimeter Measurements of the Flow Fields Around Single- and Counter-Rotation Propeller Models
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Abstract
A two-component LV system was used to make detailed measurements of the flowfield around both a single-rotation and a counter-rotation propeller/nacelle. The conditions measured for the single-rotation tractor configuration include two different blade angles and two propeller advance ratios, and for the counter-rotation propeller configuration include both pusher and tractor mounts. The measurements show the increasing slipstream velocities and contraction with increasing blade angle and with decreasing advance ratio. Data for the counter-rotation system show that the aft propeller turns the flow in the opposite direction from the front propeller. Additionally, the LV system was used as a diagnostic tool to provide data to explain the large side force measured on the propeller/nacelle at angle-of-attack.
Authors
Citation
Dunham, D., Sellers, W., and Elliott, J., "Laser Velocimeter Measurements of the Flow Fields Around Single- and Counter-Rotation Propeller Models," SAE Technical Paper 850870, 1985, https://doi.org/10.4271/850870.Also In
References
- Goldsmith, I. M. A Study to Define the Research and Technology Requirements for Advanced Turbo/Propfan Transport Aircraft NASA CR 166138 1981
- Bober, Lawrence J. Chang, Li-Ku Factors Influencing the Predicted Performance of Advanced Propeller Designs NASA TM 82676 1981
- Coe, Paul L. Jr. Applin, Zachary T. Williams, Louis J. Stability and Control Results for Advanced Turboprop Aft-Mount Installations Presented at the SAE Aerospace Congress and Exposition Long Beach, CA October 15-18 1984
- Sellers, William L. III Elliott, Joe W. Recent Applications of a Laser Velocimeter in the Langley 4- by 7-Meter Tunnel Presented at the Eighth Biennial Symposium on Turbulence University of Missouri - Rollo September 26-28 1983