Aeroacoustics of a coaxial rotor in level flight [PDF]
, 2008 The aeroacoustic characteristics of a coaxial system with teetering rotors in level forward °ight are com- pared to those of an equivalent articulated single rotor with the same solidity.
Brown, R.E. +5 more
core +12 more sources
International Journal of Aeronautical and Space Sciences, 2019 A computational fluid dynamics method is built to study the unsteady aerodynamic loads of a high-speed rigid coaxial rotor model, taking account of lift offset (LOS). The flowfield is simulated by solving Reynolds Averaged Navier–Stokes equations, and moving overset mesh is adopted to include blade motions. A high-efficient trim model for coaxial rotor
Haotian Qi +3 more
openaire +3 more sources
Numerical Analysis of the Influence of Rotor Wake on Hub Drag for a Coaxial Rigid Rotor [PDF]
Proceedings of the Advances in Materials, Machinery, Electrical Engineering (AMMEE 2017), 2017 Long He +3 more
openaire +3 more sources
Interactional aerodynamics and acoustics of a hingeless coaxial helicopter with an auxiliary propeller in forward flight [PDF]
, 2008 The aerodynamic and acoustic characteristics of a generic hingeless coaxial helicopter with a tail-mounted propulsor and stabiliser have been simulated using Brown's Vorticity Transport Model.
Brown, R.E. +3 more
core +14 more sources
A comparison of coaxial and conventional rotor performance [PDF]
, 2010 The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, Richard E., Kim, Hyo Won
core +4 more sources
Effect of rotor stiffness and lift offset on the aeroacoustics of a coaxial rotor in level flight [PDF]
, 2009 The acoustic characteristics of a twin contra-rotating coaxial rotor configuration with significant flapwise stiffness are investigated in steady forward flight.
Brown, R.E. +5 more
core +4 more sources
Modelling the aerodynamics of coaxial helicopters : from an isolated rotor to a complete aircraft [PDF]
, 2008 This paper provides an overview of recent research on the aerodynamics of coaxial rotors at the Rotorcraft Aeromechanics Laboratory of the Glasgow University Rotorcraft Laboratories.
Brown, R.E. +7 more
core +4 more sources
A minimal thrust vectoring rotor with six degree of freedom: Design and analysis
IET Cyber-systems and Robotics, 2021 This article presents a minimal thrust vectoring rotor (mTVR) with 6‐DoF motion ability. The mTVR is equipped with only three tiltable thrust units that deploy the coaxial counter‐propellers design for generating pure thrusts.
Wei Qiu, Chao Xu
doaj +1 more source
Aerodynamic Interactions Between the Propeller and Other Components in a Coaxial Compound Helicopter [PDF]
Journal of Applied Fluid MechanicsThe coaxial compound helicopter represents a promising configuration for enhancing maximum flight speed. This configuration features a pair of coaxial rigid rotors and a rear-located propeller.
Y. Cao, M. Wang
doaj +1 more source
A rational approach to comparing the performance of coaxial and conventional rotors [PDF]
, 2009 The merit, in terms of its efficiency and performance, of the twin, contrarotating coaxial rotor configuration over the more conventional single rotor system has long been a point of contention.
Brown, R.E., Kim, Hyo Wan
core +4 more sources