Results 51 to 60 of about 15,084 (235)
Wind Energy, Volume 28, Issue 9, September 2025.ABSTRACT Conventional methods for manufacturing rotor blades, such as composite construction and die casting, are hindered by high costs due to expensive molds, while 3D printing often results in poor quality or high production costs with unfavorable cost‐per‐part scaling.
Moritz Burmester +2 more
wiley +1 more source
Mathematical modeling and investigating the effect of the area of the horizontal stabilizer on the stability of a single-main-rotor helicopter in forward flight [PDF]
مجله مدل سازی در مهندسی, 2019 This paper investigates the effect of the area of the horizontal stabilizer of a single-main-rotor helicopter on its dynamic responses, stability properties, and flight handling quality during forward flights.
Fatemeh Ghaderi, Farid Shahmiri
doaj +1 more source
Rotorcraft thickness noise control
Archives of Mechanics, 2021 The paper describes an innovative idea of Thickness Noise Control (TNC) based on adoption of a flow control strategy (i.e. surface ventilation) for acoustic attenuation of helicopter rotor periodic noise.
O. Szulc
doaj +1 more source
Wind Tunnel Test of Counter‐Rotating Dual Rotor Wind Turbine With Double Rotational Armature Design
Wind Energy, Volume 28, Issue 8, August 2025.ABSTRACT This study evaluates the performance of a counter‐rotating dual rotor wind turbine (CR‐DRWT) with 2 m2 rotor radius equipped with a double rotational armature in an open jet wind tunnel. With only one similar‐sized design previously assessed in a wind tunnel, this study offers valuable validation material for the literature.
Niels Adema +3 more
wiley +1 more source
Main rotor-body action for virtual blades model
EPJ Web of Conferences, 2018 This research aims to investigate a virtual blade model and assess rotor influence on helicopter fuselage aerodynamics. The rotor disk is discretized in the azimuthal direction, and a time-varied pressure jump is applied in regions occupied by the blades.
Kusyumov Alexander +6 more
doaj +1 more source
Journal of Marine Science and Engineering, 2022 Landing a helicopter to the ship flight deck is most demanding even for the most experienced pilots and modeling and simulation of the ship-helicopter dynamic interface is a substantially challenging technical problem. In this paper, a coupling numerical
Yihua Cao +3 more
doaj +1 more source
Spring and Power in Hovering Ornithopters
Advanced Intelligent Systems, Volume 7, Issue 7, July 2025.Only small ornithopters can hover, longest at the hummingbird size. This article reviews the drive and power of these hovering machines, focusing on elastic energy and thrust boosters. Unlike two‐winged designs, X‐winged and multiple‐V‐winged ornithopters benefit from lower disk loading and slower, smaller wingbeats, and the clap‐and‐fling effect ...
Gih‐Keong Lau +4 more
wiley +1 more source
Experimental Study on the Effect of Different Parameters on Rotor Blade Icing in a Cold Chamber
Applied Sciences, 2020 Icing phenomenon is an important problem in helicopter rotor design. Conducting experiments in a cold chamber is one of the main methods used to study the law of rotor icing.
Zhengzhi Wang, Chunling Zhu, Ning Zhao
doaj +1 more source
Engineering Reports, Volume 7, Issue 7, July 2025.FR‐FMEA combines fuzzy logic and rough set theory to address uncertainty and incomplete knowledge in failure analysis. Applied to a gas turbine system, it delivers more reliable and distinct risk rankings, identifying critical components for targeted maintenance and improved reliability.
Ali Aghazadeh Ardebili +2 more
wiley +1 more source
Wind Energy, Volume 28, Issue 7, July 2025.ABSTRACT As the demand for power increases, installing small‐scale wind turbines can be an alternative solution. However, the main challenge for their implementation is the aerodynamic noise. With a view to minimizing noise, this study focuses on the performance investigation of a small‐scale horizontal‐axis wind turbine with NACA 4412 blades inspired ...
Hasan Muhommod Robin +4 more
wiley +1 more source