Results 61 to 70 of about 66,325 (272)
Polymer Composites, Volume 46, Issue S1, Page S9-S25, 10 September 2025.Typical manufacturing defects and mitigation strategies in thick thermosetting composites. Abstract The composite part industry is currently dominated by thin‐section geometries. However, thick composites gain interest in many applications where monolithic parts are required, such as foils, wind mill root blades, and so forth.
Francesco Taddei +2 more
wiley +1 more source
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
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
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
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
Pneumatic boot for helicopter rotor deicing [PDF]
, 1981 Pneumatic deicer boots for helicopter rotor blades were tested. The tests were conducted in the 6 by 9 ft icing research tunnel on a stationary section of a UH-IH helicopter main rotor blade.
Blaha, B. J., Evanich, P. L.
core +1 more source
, 2020 Rotor noise is one of the most important reasons for restricting helicopter development; hence, the optimization design of rotor blade considering aeroacoustic and aerodynamic performance at the same time has always been the focus of research attention ...
Y. Bu +4 more
semanticscholar +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