Results 61 to 70 of about 94,319 (292)
Diagnosis of a rotor imbalance in a wind turbine based on support vector machine
AIP AdvancesRotor imbalances in wind turbines present safety risks and lead to economic losses, and a method to diagnose rotor imbalances is urgently needed. A diagnostic method for rotor imbalances is proposed in this paper. First, a signal reconstruction method is
Mingyang Chen +5 more
doaj +1 more source
Passive Rotor Noise Reduction Through Axial and Angular Blade Spacing Modulation
AerospaceThis study investigates the aerodynamic and aeroacoustic performance of a novel two-stage two-bladed coaxial propeller that is axially and angularly spaced.
Chingiz Arystanbekov +2 more
doaj +1 more source
Fan noise reduction achieved by removing tip flow irregularities behind the rotor - forward arc test configurations [PDF]
The noise source caused by the interaction of the rotor tip flow irregularities (vortices and velocity defects) with the downstream stator vanes was studied. Fan flow was removed behind a 0.508 meter (20 in.) diameter model turbofan through an outer wall
Dittmar, J. H. +2 more
core +1 more source
Energy Science &Engineering, EarlyView.An AI‐driven CNN–LSTM forecasting framework is integrated with HOMER Pro to optimally design a grid‐connected PV–wind–BESS microgrid for a rural school in Bangladesh, achieving 91.7% renewable penetration, low energy cost (0.0397 USD/kWh), and an 81.5% reduction in CO2 emissions. ABSTRACT Hybrid renewable microgrid planning in HOMER Pro often relies on
Robiul Khan +5 more
wiley +1 more source
Rotor performance characteristics from an aeroacoustic helicopter wind-tunnel test program [PDF]
An investigation of helicopter rotor noise at model scale was conducted in the Langley 4 by 7 meter tunnel. The program described was the first of a planned three-phase project whose purpose was to examine the characteristic noise mechanism involved in ...
Elliott, J. W., Hoad, D. R., Orie, N. M.
core +1 more source
Energy Science &Engineering, EarlyView.Graphical abstract of wind energy study in the Vicinity of GolGohar Sirjan Mining and Industrial Company. ABSTRACT Wind energy is a central pillar of sustainable energy transition; however, its feasibility strongly depends on site‐specific wind regimes and economic conditions.
Hossein Amiri
wiley +1 more source
Effects of Different Attack Angles and Guide Vane Numbers on the Vortex-solid Interaction Noise of Axial Flow Fan [PDF]
Journal of Applied Fluid MechanicsThis paper utilizes experiments and numerical simulations to investigate the effects of different attack angles of the rotor and the number of guide vanes on the vortex-solid interaction and noise generation of an axial flow fan.
Z. Tu, Y. Li, J. Zhou, Z. Chen
doaj +1 more source
The validation and application of a rotor acoustic prediction computer program [PDF]
An essential prerequisite to reducing the acoustic detectability of military rotorcraft is a better understanding of main rotor noise which is the major contributor to the overall noise.
Gallman, Judith M.
core +1 more source
Energy Science &Engineering, EarlyView.ABSTRACT Accurate long‐term wind speed forecasting is pivotal for the strategic planning of renewable energy infrastructure, particularly for assessing the techno‐economic feasibility of wind‐powered green hydrogen facilities. However, capturing the complex spatiotemporal dependencies in climate data remains a significant challenge. This study proposes
Iman Baghaei +2 more
wiley +1 more source
Experimental Acoustic Investigation of Rotor Noise Directivity and Decay in Multiple Configurations
AerospaceIn the framework of the MATIM project, an acoustic test campaign was conducted on a platform derived from a commercial-class quadcopter within the CIRA semi-anechoic chamber.
Giovanni Fasulo +3 more
doaj +1 more source