Simulation of boundary states of helicopter flight

• Autorzy: Stanisławski Jarosław

Identyfikatory

DOI

10.2478/kones-2019-0042

• Języki publikacji: EN

Abstrakty

EN

Results of simulation of main rotor blade loads and deformations, which can be generated during boundary states of helicopter flight, are presented. Concerned cases of flight envelope include hover at maximum height, level flight at high velocity, pull-up manoeuvres applying cyclic pitch and mixed collective and cyclic control. The simulation calculations were executed for data of light helicopter with three-bladed articulated rotor. For analysis, the real blades are treated as elastic axes with distributed masses of blade segments. The model of deformable blade allows for out-of-plane bending, in plane bending, and torsion. For assumed flight state of helicopter, the equations of rotor blades motion are solved applying Runge-Kutta method. According to Galerkin method, for each concerned azimuthal position of blade the parameters of its motions are assumed as a combination of considered bending and torsion eigen modes of the blade. The loads of rotor blades generated during flight depend due to velocity of flight, helicopter mass, position of rotor axis in air and deflections of swashplate that correspond to collective and cyclic pitch angle applied to rotor blades. The results of simulations presenting rotor loads and blade deformations are shown in form of timeruns and as plots of rotor-disk distributions. The simulations of helicopter flight states may be useful for prediction the conditions of flight-tests without exceeding safety boundaries or may help to define limitations for manoeuvre and control of helicopter.

Słowa kluczowe

EN

helicopter; boundary flight; rotor loads

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2019
• Tom: Vol. 26, No. 2
• Strony: 137--144
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Stanisławski Jarosław

• Łukasiewicz Research Network − Institute of Aviation Krakowska Av. 110/114, 02-256 Warsaw, Poland tel.: [phone] ext. 362

Bibliografia

• [1] Bain, J., Sim, B. W., Sankar, L., Brentner, K., Aeromechanics and Aeroacoustics Predictions of the Boeing -SMART Rotor Using Coupled -CFD/CSD Analysis, AHS 66th Annual Forum, Phonix, Arizona 2010.
• [2] Bousman, W. G., Putting the Aero Back Into Aeroelasticity, NASA/TM-2000-209589, Ames Research Center Moffett Field, California 2000.
• [3] Bousman, W. G., Kufeld, R. M., UH-60A Airloads Catalog, NASA/TM-2005-212827, 2005.
• [4] Bousman, W. G., Rotorcraft Airloads Measurements-Extraordinary Costs, Extraordinary Benefits, NASA/TP-2014-218374, Ames Research Center Moffett Field, California 2014.
• [5] Gula, P., Gorecki, T., Design, Experiments and Development of a Polish Unmanned Helicopter ILX-27, 39st European Rotorcraft Forum, Moscow 2013.
• [6] Johnson, W., Milestones in Rotorcraft Aeromechanics, NASA/TP-2011-215971, Ames Research Center Moffett Field, California 2011.
• [7] Johnson, W., A History of Rotorcraft Comprehensive Analyses, AHS 69th Annual Forum, Phonix, Arizona 2013.
• [8] Stalewski, W., Aerodynamic designing and optimalization of Rotorcrafts (in Polish: Projektowanie i optymalizacja aerodynamiczna wiropłatów), Biblioteka naukowa nr 52, Wydawnictwo Naukowe Instytutu Lotnictwa, Warszawa 2017.
• [9] Wang, L., Diskin, B., Biedron, R. T., Neilsen, E. J., Sonneville, V., Bauchau, O. A., High-Fidelity Multidisciplinary Design Optimization Methodology with Application to Rotor Blades, Aeromechanics Design for Transformative Vertical Flight, San Francisco, California 2018
• [10] Yeo, H., Romander, E. A., Norman, T. R., Investigatioin of Rotor Performance and Loads of a UH-60A Individual Blade Control System, Journal of the American Helicopter Society, Vol. 56, 2011.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).