Results 31 to 40 of about 15,084 (235)

A Study on Influence of Flapping Dynamic Characteristics on Vibration Control of Active Rotor with Trailing-Edge Flaps

Aerospace, 2023
An active rotor with trailing-edge flaps (TEFs) is an effective active vibration control method for helicopters. Blade flapping dynamic characteristics have a significant effect on the active vibration control performance of an active rotor.
Xiancheng Gu, Linghua Dong, Tong Li, Weidong Yang   +3 more
doaj   +1 more source

Some Peculiarities of Helicopter Main Rotor Aeroacoustic for Far-Field Observer [PDF]

EPJ Web of Conferences, 2019
Mathematical models for helicopter rotor acoustics are usually based on the Ffowcs Williams–Hawkings (FW–H) equation. The level of rotor noise is determined by geometry (thickness noise) of a flying vehicle and distributed blade loading (loading noise ...
Kusyumov Alexander, Mikhailov Sergey, Kusyumov Sergey, Romanova Elena, Barakos Georgios   +4 more
doaj   +1 more source

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

Advanced Materials Technologies, Volume 11, Issue 3, 5 February 2026.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk, Senentxu Lanceros‐Mendez, Abílio Pereira Silva   +2 more
wiley   +1 more source

The influence of helicopter tail rotor parameters on RCS

Hangkong gongcheng jinzhan
High requirements have been placed on the stealth performance of armed helicopters during wartime missions，in order to reduce the probability of the helicopter being found during the task，based on geometric optics method and consistent diffraction theory，
ZHAO Qijun
doaj   +1 more source

Numerical simulation for three-dimensional rotor icing in forward flight

Advances in Mechanical Engineering, 2018
Icing will occur when helicopters pass through clouds containing supercooled droplets. The ice accreted on rotor blade affects the safety of helicopter. A numerical simulation method of helicopter rotor icing in forward flight is presented, and the icing
Zhengzhi Wang, Ning Zhao, Chunling Zhu
doaj   +1 more source

Advances in Delamination Analysis and Damage Prediction: A Comprehensive Review on Polymer Composite Materials

Engineering Reports, Volume 8, Issue 2, February 2026.
This comprehensive study advances delamination analysis in composites through innovative computational methods, experimental validation techniques, and predictive algorithms, collectively enhancing damage progression prediction and structural health monitoring for improved integrity in high‐performance applications.
Dhivya Elumalai, Ananda Babu Arumugam, Yitbarek Gashaw Tadesse, Mesfin Kebede Kassa, Mohit Gupta   +4 more
wiley   +1 more source

Development of an aeroelastic stability boundary for a rotor in autorotation [PDF]

, 2008
<p>For the present study, a mathematical model AMRA was created to simulate the aeroelastic behaviour of a rotor during autorotation. Our model: Aeroelastic Model of a Rotor in Autorotation (AMRA) captures transverse bending and teeter ...
Gillies, E.A., Thomson, D.G., Trchalík, J.   +2 more
core  

One‐Dimensional Finite Elements With Arbitrary Cross‐Sectional Displacement Fields

International Journal for Numerical Methods in Engineering, Volume 127, Issue 1, 15 January 2026.
ABSTRACT This paper introduces an unprecedented unified approach for developing structural theories with an arbitrary kinematic variable over the beam cross‐section. Each of the three displacement variables can be analyzed using an independent expansion function. Both the order of the expansion and the number of terms in each field can be any. That is,
E. Carrera, D. Scano, E. Zappino
wiley   +1 more source

Study on the Mechanism of the Variable-Speed Rotor Affecting Rotor Aerodynamic Performance

Applied Sciences, 2018
The variable-speed rotor has proven to be a promising means to improve helicopter performance. Previous investigations on the aeromechanics of the variable-speed rotor are scarce.
Jiayi Xie, Nanxiang Guan, Ming Zhou, Zhifeng Xie   +3 more
doaj   +1 more source

Effect of Airfoil's Attack Angle and Airfoil‐Cylinder Configuration on Turbulence Parameters and Airfoil's Aerodynamic Efficiency

Energy Science &Engineering, Volume 13, Issue 11, Page 5432-5450, November 2025.
The increasing demand for energy in daily life and the finite nature of fossil fuel reserves have driven researchers worldwide to explore renewable energy sources such as wind energy. To optimize the performance and minimize energy losses in vertical wind turbines, parameters such as the airfoil's angle of attack, as well as the horizontal and vertical
Reza Abbaspour, Mitra Yadegari, Abdolamir Bak Khoshnevis   +2 more
wiley   +1 more source