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Jiayu Wen, Yanguo Song, Huanjin Wang and Dong Han
This work presents a systematic approach to analyzing the aerodynamic characteristics of tandem rotor forward autorotation considering rotor-to-rotor interference. The single-rotor computational model trimmed from a generic helicopter flight dynamics ana...
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Nikos Spyropoulos, George Papadakis, John M. Prospathopoulos and Vasilis A. Riziotis
In this paper, the accuracy of an in-house Actuator Line (AL) model is tested on aeroelastic simulations of a Wind Turbine (WT) rotor and a helicopter Main Rotor (MR) under uniform free-stream flow. For the scope of aeroelastic analyses, the AL model is ...
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Chang Wang, Minqi Huang, Xianmin Peng, Guichuan Zhang, Min Tang and Haowen Wang
The aerodynamic performance of a reduced-scale coaxial rigid rotor system in hover and steady forward flights was experimentally investigated to gain insights into the effect of interference between upper and lower rotors and the influences of the advanc...
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Jiayi Xie, Zhifeng Xie, Ming Zhou and Jun Qiu
The aerodynamic design of rotor blades is challenging, and is crucial for the development of helicopter technology. Previous aerodynamic optimizations that focused only on limited design points find it difficult to balance flight performance across the e...
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Xinfan Yin, Hongxu Ma, Xianmin Peng, Guichuan Zhang, Honglei An and Liangquan Wang
In order to simulate the flight state of the helicopter effectively, it is necessary to trim the helicopter during the forward flight in a wind tunnel test. Previously, due to the lack of an internal-control closed loop in the test rig, the helicopter-wi...
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Guoqiang Li, Qing Wang, Qijun Zhao, Guoqing Zhao, Fei Feng and Linxin Wu
The environment for the shipboard landing and takeoff of helicopters is extremely complex and significantly affects their safe flight. To address the intricate characteristics of the flow field during these operations, a simulation method suitable for ro...
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Anton Hadar, Andrei-Daniel Voicu, Florin Baciu, Daniel Vlasceanu, Daniela-Ioana Tudose and Stefan-Dan Pastrama
This paper describes the transition towards a composite structure, with the same overall aerodynamic characteristics, for a tail rotor blade of an IAR330 helicopter. The newly proposed structure of the composite blade is made of a carbon-roving spar embe...
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Jinbin Fu, Yi Yuan and Luigi Vigevano
The accurate prediction of helicopter rotor aerodynamics and aeroacoustics using Computational Fluid Dynamics (CFD) techniques still remains a challenge, as the over-dissipation of numerical schemes results in a higher diffusive rate of rotor wake and vo...
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Chunhua Wei, Chenglin Zuo, Xianhui Liao, Guoshuai Li, Lingrui Jiao, Di Peng and Lei Liang
A simultaneous surface pressure and displacement measurement method that integrates pressure-sensitive paint (PSP) and binocular stereophotogrammetry is proposed. The assays were completed on the F4 m rotor test stand at China Aerodynamic Research and De...
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Patrick Pölzlbauer, Andreas Kümmel, Damien Desvigne and Christian Breitsamter
The present work is part of the Clean Sky 2 project Full-Fairing Rotor Head Aerodynamic Design Optimization (FURADO), which deals with the aerodynamic design optimization of a full-fairing rotor head for the Rapid And Cost-Effective Rotorcraft (RACER) co...
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Khiem Van Truong
To fulfill the objective of a predictive tool for rotorcraft, comprehensive analysis (CA) needs to be capable of providing both accurate and time-efficient predictions of rotor air loads and structural loads. The more recent methodology based on comprehe...
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Khiem Van Truong
To fulfill the objective of a predictive tool for rotorcraft, comprehensive analysis (CA) needs to be capable of providing both accurate and time-efficient predictions of rotor air loads and structural loads. The more recent methodology based on comprehe...
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Julia A. Cole, Lauren Rajauski, Andrew Loughran, Alexander Karpowicz and Stefanie Salinger
There is currently interest in the design of small electric vertical take-off and landing aircraft to alleviate ground traffic and congestion in major urban areas. To support progress in this area, a conceptual design method for single-main-rotor and lif...
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Yu Tian, Luofeng Wang, Zhongliang Zhou and Renliang Chen
In order to reveal the mechanism of Category II rotor-body-slung-load coupled oscillation (RBSLCO) with the frequency range of 2.5~8 Hz, a novel nonlinear rigid-elastic coupled model is presented for the helicopter and slung load system (HSLS) with expli...
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Marjan Dodic, Branimir Krstic, Bosko Rasuo, Mirko Dinulovic and Aleksandar Bengin
This article addresses the numerical computation problem of induced inflow ratio based on the helicopter momentum theory in forward flight. The Glauert inflow formula (equation) is a nonlinear equation usually solved by the Newton?Raphson method in a rel...
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Yan Sun, Yongjie Shi and Guohua Xu
The accurate prediction of helicopter rotor blade?vortex interaction (BVI) noise is challenging. This paper presents an implementation of the seventh-order improved weighted essentially non-oscillatory (WENO-Z) scheme for predicting rotor BVI noise using...
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Oleksandr Lytviak, Vasyl Loginov, Sergii Komar and Yevhen Martseniuk
Self-oscillations are one of the common problems in the complex automatic system, that can occur due to the features of the workflow and the design of the governor. The development of digital control systems has made it possible to damp self-oscillations...
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Abdallah Samad, Eric Villeneuve, Caroline Blackburn, François Morency and Christophe Volat
Successful icing/de-icing simulations for rotorcraft require a good prediction of the convective heat transfer on the blade?s surface. Rotorcraft icing is an unwanted phenomenon that is known to cause flight cancelations, loss of rotor performance and se...
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Abdallah Samad, Eric Villeneuve, François Morency and Christophe Volat
In-flight icing affects helicopter performance, limits its operations, and reduces safety. The convective heat transfer is an important parameter in numerical icing simulations and state-of-the-art icing/de-icing codes utilize important computing resourc...
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Abdallah Samad, Gitsuzo B. S. Tagawa, François Morency and Christophe Volat
Calculating the unsteady convective heat transfer on helicopter blades is the first step in the prediction of ice accretion and the design of ice-protection systems. Simulations using Computational Fluid Dynamics (CFD) successfully model the complex aero...
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