This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Full-Scale Study of the Cooling System Aerodynamics of an Operating Piston Engine Installed in a Light Aircraft Wing Panel
Annotation ability available
Sector:
Language:
English
Abstract
Measurements of the drag and of the nacelle internal pressures on a wing and nacelle that housed a horizontally opposed piston engine were made in the 40- by 80-Foot Wind Tunnel at Ames Research Center. These tests are follow-ons to earlier tests made with the same wing and nacelle but in which the engine was replaced with an electric motor and an adjustable orifice plate. In the initial tests the orifice plate was used to control the rate of cooling-air flow through the nacelle and thereby to simulate a range of gasoline engine types. Good agreement was found between the results of those tests and of the test reported here. Also, the upper and lower plenum pressure and cooling-air flow rate were found to be related by conventional equations used to represent the flow through orifices. Tests were run with three cooling air inlet sizes over a free-stream velocity range from 50 to 150 knots, an angle of attack range from 0° to 10°, and a cowl-flap deflection range from 0° to 30°. The data were analyzed by computing a flow coefficient similar to that used in the analysis of orifices. It was found that all of the flow coefficient values fell within a band that varied linearly with inlet area. The linear mean line through this band provides an estimate of the relationship between cooling-air flow rate and upper plenum pressure over a wide range of test conditions.
Recommended Content
Authors
Topic
Citation
Corsiglia, V. and Katz, J., "Full-Scale Study of the Cooling System Aerodynamics of an Operating Piston Engine Installed in a Light Aircraft Wing Panel," SAE Technical Paper 810623, 1981, https://doi.org/10.4271/810623.Also In
References
- Corsiglia V. R. Katz J. Kroeger R. A. “Full-Scale Wind Tunnel Study of Nacelle Shape on Cooling Drag.” AIAA Paper 79- 1820 New York, N.Y. 1979 18 2 Feb. 1981
- Katz J. Corsiglia V. R. Barlow P. “Experimental Study of Cooling Air Inlet and Exit Geometries of Horizontally Opposed Aircraft Engines.” Paper 80-1242, AIAA/Asme 16th Joint Propulsion Conference Hartford, Conn. June 1980
- Katz J. Corsiglia V. R. Barlow P. “Effect of Propeller on the Drag and Performance of the Cooling System in a General Aviation Twin Engine Aircraft.” AIAA Aircraft System and Technology Meeting Anaheim, Calif. Aug. 1980
- Barlow P. R. Corsiglia V. R. Katz J. “Full-Scale Aerodynamic Characteristics of a Propeller Installed on a Small Twin-Engine Aircraft Wing Panel.” NASA TP-1816 1981