Results 1 to 10 of about 1,210 (163)
Helicopter modelling and study of the accelerated rotor [PDF]
Advances in Engineering Software, 2018 This work presents a helicopter dynamic model that captures the fuselage vibrations for an accelerated main rotor. Some rotor parameters are modified with the purpose of study their impact on the rotorcraft. Being this, a tool that allows to predict vibrations on the helicopter.
Salvador Castillo-Rivera +1 more
exaly +3 more sources
Aerodynamics Analysis of Helicopter Rotor in Flight Test Using Strain Gauge Sensors [PDF]
SensorsThe acquisition of aerodynamic loads on helicopter rotors is fundamental to the study of helicopter performance optimization, structural design, flight control, and other aspects.
Shuaike Jiao, Jiahong Zheng
doaj +2 more sources
Research on Tail Rotor Load Test Flight Technology for Helicopters Based on Strain Sensor Measurement [PDF]
SensorsThe load characteristics of the helicopter tail rotor system are critical to flight safety and handling performance, and flight testing remains the most direct and reliable means to obtain authentic load data.
Shuaike Jiao +3 more
doaj +2 more sources
Engineering Applications of Computational Fluid Mechanics, 2019 Coupled ship/coaxial-rotor simulations have been conducted to investigate the rotor loads of a shipborne coaxial-rotor helicopter during a vertical landing based on Reynolds-averaged Navier-Stokes (RANS) solver.
Guohua Xu
exaly +2 more sources
Journal of Industrial Design and Engineering Graphics, 2011 The objective of this paper is to analyze the role of helicopter rotor, to classify them by type, and to imagine new types of helicopter rotors that can equip future helicopters.
IONESCU Cristian Andrei
doaj +1 more source
Effect of low temperature on fatigue and crack propagation behavior of aeronautic aluminium alloy
Journal of Aeronautical Materials, 2021 Fatigue and crack growth tests were performed on two categories of the common aeronautic aluminum- alloys 2524-T3 and 7050-T7451 at ambient temperature of 25 ℃ and cryogenic temperature of –70 ℃, in order to investigate the fatigue and crack propagation ...
LIU Mudong
doaj +1 more source
Aerodynamic Modeling and Performance Analysis of Variable-Speed Coaxial Helicopter
Applied Sciences, 2022 In this paper, the variable-speed coaxial helicopter is modelled by the blade element method, non-uniform inflow method and empirical function method, and the aerodynamic performance analysis method is proposed.
Anan Xu, Fang Wang, Ming Chen, Liang Li
doaj +1 more source
Research Status and Advances in Cryogenic Crack Propagation of Aeronautic Aluminium-alloys
Hangkong gongcheng jinzhan, 2020 Aluminium-alloys are widely used in aeronautical engineering due to the advantages of high strength and easy processing. Low temperature inevitably occurs in aero-structures of aluminium-alloys, and cryogenic crack propagation of aeronautic aluminium ...
LIU Mudong
doaj +1 more source
Numerical Calculation Of Aerodynamic Loads Of Helicopter Rotor Using CFD / BET Method [PDF]
فناوری در مهندسی هوافضا, 2023 Considering the complexity of analyzing the phenomena affecting the aerodynamic performance of the main rotor helicopter and how to simulate the dynamic movements of the blade relative to the center of rotation, Using methods such as blade element theory
Mehdi Naderi Nezhad +2 more
doaj +1 more source
Jurnal Eltek, 2023 Vibrasi pada helikopter menjadi konsentrasi tersendiri untuk terus ditingkatkan penanganannya. Hal ini dikarenakan selain dapat menyebabkan kerusakan struktur badan helikopter jika vibrasi yang dihasilkan terlalu besar juga berpengaruh pada kenyamanan ...
Farida Gamar +2 more
doaj +1 more source