Hover test of a full-scale hingeless helicopter rotor: Aeroelastic stability, performance and loads data [PDF]
A hover test of a full-scale, hingeless rotor system was conducted in the NASA Ames 40- by 80-foot wind tunnel. The rotor was tested on the Ames rotor test apparatus.
Peterson, R. L., Warmbrodt, W.
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Intelligent Design Method for Thermal Conductivity Topology Based on a Deep Generative Network
Chinese Journal of Mechanical EngineeringHeat dissipation performance is critical to the design of high-end equipment, such as integrated chips and high-precision machine tools. Owing to the advantages of artificial intelligence in solving complex tasks involving a large number of variables ...
Qiyin Lin +7 more
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Impact of Heat Treatment on the Rubbing Behavior of Bump-Type Foil Journal Bearing
Tribology OnlineUnder low-speed or start/stop conditions, the rubbing of top foil in foil journal bearing (FJB) prompting the application of heat treatment to improve the rubbing behavior of the foil bearing.
Vishal Mourya, Skylab P. Bhore
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Shock and Vibration, 2016 A novel hybrid bearing with the introduction of piezoelectric controller and tilting pads to control vibration actively is proposed in this paper, and the feasibility of this scheme is verified by theoretical calculation and experimental data.
Runlin Chen +4 more
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Acoustic test of a model rotor and tail rotor: Results for the isolated rotors and combined configuration [PDF]
Acoustic data from a model scale main rotor and tail rotor experiment in the NASA Langley 14 by 22 Foot Subsonic Tunnel are presented for the main rotor and trail rotor in isolation and for the two rotors operating together. Results for the isolated main
Burley, C. L. +2 more
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An investigation of rotor harmonic noise by the use of small scale wind tunnel models [PDF]
Noise measurements of small scale helicopter rotor models were compared with noise measurements of full scale helicopters to determine what information about the full scale helicopters could be derived from noise measurements of small scale helicopter ...
Schaffer, E. G., Sternfeld, H., Jr.
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Passive cyclic pitch control for horizontal axis wind turbines [PDF]
, 1981 A flexible rotor concept, called the balanced pitch rotor, is described. The system provides passive adjustment of cyclic pitch in response to unbalanced pitching moments across the rotor disk.
Bottrell, G. W.
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Case study of natural convection topology optimization based on finite volume method
Case Studies in Thermal EngineeringTopology optimization is crucial for improving natural convection cooling devices. This study applies natural convection topology optimization to various engineering cases, including 2D, 3D, inclined, and inverted heat sink with various boundary ...
Honglei Liu +5 more
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Performance of a tandem-rotor/tandem-stator conical-flow compressor designed for a pressure ratio of 3 [PDF]
A conical-flow compressor stage with a large radius change through the rotor was tested at three values of rotor tip clearance. The stage had a tandem rotor and a tandem stator. Peak efficiency at design speed was 0.774 at a pressure ratio of 2.613.
Owen, A. K. +2 more
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Journal of Materials Research and TechnologySi3N4 ceramics are ideal materials for liquid rocket turbopump bearings due to their excellent properties such as low-temperature resistance, low density, and wear resistance.
Fei Chen +5 more
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