Blade-vortex interaction
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Poling, David R.↗
Engineering topics
Dadone, Leo
Publications and source records attributed to Dadone, Leo.
The prediction of loads on the Boeing Helicopters Model 360 rotor
Results are presented from a test/theory correlation investigation involving three rotor-analysis codes, two full potential rotor flow CFD solvers, and data obtained from tests on the Model 360 helicopter's rotor. Attention is given to the problem of reliable higher harmonic loading prediction. It is found that the rotor hover performance and loading experimental data are in excellent agreement with a novel, full potential free-wake computational technology; the need for a multiple tip-vortex wake model's use in predicting vibratory airloads is confirmed.
Dadone, Leo↗
Rotorcraft technology at Boeing Vertol: Recent advances
An overview is presented of key accomplishments in the rotorcraft development at Boeing Vertol. Projects of particular significance: high speed rotor development and the Model 360 Advanced Technology Helicopter. Areas addressed in the overview are: advanced rotors with reduced noise and vibration, 3-D aerodynamic modeling, flight control and avionics, active control, automated diagnostics and prognostics, composite structures, and drive systems.
Shaw, John↗
Model 360 rotor test at DNW - Review of performance and blade airload data
The results of tests on a pressure gage instrumented model rotor, performed at the Duits Nederlandse Windtunnel (DNW) are discussed. The rotor, which was a 1/5 scale model of the Boeing Vertol model 360 rotor, was tested both in the anechoic open jet test section, and in the 8 x 6 m closed test section of the DNW. The wind tunnel, the blade instrumentation, and the test conditions are described, and data on rotor performance, blade and control loads, and blade-pressure and acoustic measurements are presented.
Dadone, Leo↗
Blade-vortex interaction
A conformal transformation and discrete vortex dynamics are used to calculate the interaction of a blade with vortices drifting with the free stream. An unsteady Kutta condition is employed to dictate the strength of vortices shed at the trailing edge. Instantaneous pressure distributions are calculated and compared with earlier experimental and analytical data.
Poling, David R.↗