Laser velocimeter measurements of the flow fields around single- and counter-rotation propeller modelsA two-component LV system was used to make detailed measurements of the flow field 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 ratios. 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.
Document ID
19850067954
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dunham, D. M. (NASA Langley Research Center Hampton, VA, United States)
Sellers, W. L., III (NASA Langley Research Center Hampton, VA, United States)
Elliott, J. W. (U.S. Army, Structures Laboratory, Hampton VA, United States)