Results 281 to 290 of about 3,387,018 (354)

Blade Load Reconstruction from Embedded Strain Measurements

Proceedings of the Vertical Flight Society 78th Annual Forum, 2022
Rotorcraft blades are subject to significant dynamic loads both in standard and critical operating conditions. The knowledge and the prediction of the produced aerodynamic loads could represent an advantage in preventing failures on the rotorcraft, but also to avoid unnecessary inspections and reduce the downtime of the aircraft.
Talamo, C., Bettini, P., Rigamonti, D., Masarati, P., Cumbo, R., De Gregoriis, D.   +5 more
openaire   +2 more sources

Turbine Blade Loading and Experimental Verification

Applied Mechanics and Materials, 2013
The paper describes process of verification of FEM model of turbine rotor blade fatigue tests. Design of new turbine blade is tested on experimental stand, where load situation is similar to load of rotor blade of steam turbine during operation. Real load of blade and boundary condition on experimental stand was monitored by means of strain gauges set.
Karel Doubrava, Jiří Kuželka
openaire   +1 more source

BLADE: A Broadband Loaded Antenna DEsigner

IEEE Antennas and Propagation Magazine, 2006
This paper presents a software tool for designing loaded antennas equipped with matching networks for broadband or multi-band applications. The software implements a genetic algorithm to automatically optimize the large set of parameters involved in the design procedure.
L. Mattioni, G. Marrocco
openaire   +1 more source

Damage mode identification of composite wind turbine blade under accelerated fatigue loads using acoustic emission and machine learning

Structural Health Monitoring, 2019
This article studies experimentally the damage behaviors of a 59.5-m-long composite wind turbine blade under accelerated fatigue loads using acoustic emission technique.
Pengfei Liu, Dong Xu, Jingguo Li, Zhiping Chen, Shuaibang Wang, J. Leng, R. Zhu, L. Jiao, Weisheng Liu, Zhongxiang Li   +9 more
semanticscholar   +1 more source

Experimental investigation of blade and propeller loads: Steady turning motion

Applied Ocean Research, 2019
This paper is the continuation of the work described in [14] , dedicated to the presentation of the results of propeller performance in behind-hull during straight ahead motion obtained by a novel experimental set-up for the measurements of single blade ...
F. Ortolani, G. Dubbioso
semanticscholar   +1 more source

Rotor blade harmonic air loading

AIAA Journal, 1964
The determination of the air loads acting on rotor blades in forward flight presents an interesting and challenging problem in applied aerodynamics. Of particular importance for design purposes are the oscillatory components of this loading occurring at harmonics of the rotor speed.
openaire   +1 more source

Experimental investigation of single blade and propeller loads by free running model test. Straight ahead sailing

Applied Ocean Research, 2019
The understanding and the accurate assessment of propeller loads in realistic operative scenario, both design and off-design conditions, is of paramount importance to design low emission and comfortable ships, fulfilling the requirements of structural ...
F. Ortolani, G. Dubbioso
semanticscholar   +1 more source

Blade Loading and Spanwise Effects on Wake Characteristics of Compressor Rotor Blade

Journal of Aircraft, 1982
An experimental investigation of the blade loading and spanwise effects on the rotor wake is presented. The investigation was limited to a study of a low subsonic and incompressible wake flow found downstream of a lightly loaded rotor. Measurements were made with a triaxial hot wire probe mounted in the stationary frame of reference at six radial and ...
B. Reynolds, B. Lakshminarayana
openaire   +1 more source

Effect of Helicopter Blade Dynamics on Blade Aerodynamic and Structural Loads

Journal of the American Helicopter Society, 1987
The effect of rotor blade dynamics on aerodynamic and structural loads is examined for a conventional, main- rotor helicopter using both a comprehensive rotorcraft analysis (CAMRAD) and night test data. The impact of blade dynamics on blade section lift-coefficient time histories is studied by comparing predictions from both a rigid blade analysis and ...
openaire   +1 more source

Wind Turbine Rotor Blades under Fatigue Loads

1990
To investigate fatigue life of wind turbine rotor blades DLR operates a 100 kW wind energy converter with 25 m diameter rotor at its test site in Southern Germany. Additionally, fatigue tests on Gl-Ep material and full scale components are carried out at the laboratory. Results of these investigations are presented.
Kensche, Ch., Seifert, H.
openaire   +2 more sources