Results 271 to 280 of about 188,936 (312)

Effects of rotor–rotor interaction for a small tandem rotor operating in a crosswind

Physics of Fluids
This study investigates the effects of rotor–rotor interaction on the wake and thrust characteristics of a small tandem rotor operating in a crosswind. Flow velocity and force measurements were conducted in a wind tunnel with two rotors arranged parallel to a crosswind. The results show that the rotor–rotor interaction significantly influences the wake
Seokbong Chae, Seungcheol Lee, Seongyun Hwang, Seokwon Jeong, Jooha Kim   +4 more
openaire   +1 more source

Unsteady interaction of a rotor with a vortex

20th Fluid Dynamics, Plasma Dynamics and Lasers Conference, 1989
The unsteady, three-dimensional flow field of a helicopter rotor blade encountering a passing vortex is calculated by solving the Euler/thin layer Navier-Stokes equations by a finite-difference numerical procedure. A prescribed vortex method is adopted to preserve the structure of the interacting vortex.
G. SRINIVASAN, W. MCCROSKEY
openaire   +1 more source

Open Rotor Broadband Interaction Noise

18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference), 2012
A theoretical model is presented for calculating the broadband noise produced by the interaction of an open rotor with the wake from either an upstream contra-rotating rotor or a stationary pylon. The model is used to investigate the dependence of the radiated noise on parameters such as pylon–rotor gap and the polar and azimuthal directivity of the ...
openaire   +2 more sources

Turbine Rotor-Stator Interaction

Journal of Engineering for Power, 1982
The aerodynamic interaction between the rotor and stator airfoils of a large scale axial turbine stage have been studied experimentally. The data included measurements of the time averaged and instantaneous surface pressures and surface thin film gage output on both the rotor and stator at midspan.
R. P. Dring, H. D. Joslyn, L. W. Hardin, J. H. Wagner   +3 more
openaire   +1 more source

An analysis of rotor-stator interaction

2012
The aim of this paper is to investigate the influence of rotor-stator interaction on the dynamic behaviour of a rotor-bearing system. First the model of a SDOF system with two stop-ends is established. The analytical solution permits testing the stability and the robustness of the penalty contact law combined with two numerical schemes. Second, a three-
Duran, Celio, Manin, Lionel, Andrianoely, Marie-Ange, Bordegaray, Céline, Dufour, Régis   +4 more
openaire   +2 more sources

Aeroacoustic and aerodynamic measurements at the rotor plane in the interaction of a small rotor with wings

The Journal of the Acoustical Society of America
Current research on tiltrotor noise predominantly concentrates on configurations with high disk loading and Reynolds numbers, leaving smaller aircraft setups underexplored. This study investigates aeroacoustic and aerodynamic trends resulting from rotor-wing interaction at low disk loading (<100 N/m2) and Reynolds number (Re < 100 000 ...
Mingtai Chen, Lucy Liu, Yuhan Chen, Jacob Wimsatt   +3 more
openaire   +2 more sources

Lynx Main Rotor/Tail Rotor Interactions: Mechanisms and Modelling

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 1994
A flight trial has been conducted by the Defence Research Agency (DRA) Bedford using a Lynx AH Mk5 helicopter fitted with an instrumented tail rotor to collect data on tail rotor aerodynamic performance. The analysis carried out to date has concentrated on the effects of main rotor wake interactions on the tail rotor.
openaire   +1 more source

Dipolar rotor-rotor interactions in a difluorobenzene molecular rotor crystal

Physical Review B, 2006
Robert D. Horansky, Laura I. Clarke, Erick B. Winston, John C. Price, Steven D. Karlen, Peter D. Jarowski, Rosa Santillan, Miguel A. Garcia-Garibay   +7 more
openaire   +1 more source

Stability and Control of a Coaxial Quadcopter with Rotor-On-Rotor Interactional Aerodynamics

Journal of the American Helicopter Society
This article focuses on the integration of generalized rotor-on-rotor interactional aerodynamics models in state-variable form within flight dynamics simulations of multi-rotor unmanned aircraft systems, and on their subsequent linearization. The aircraft chosen for this investigation is a resupply coaxial quadcopter.
Dogyu Jun, Umberto Saetti, Ondrej Juhasz
openaire   +1 more source

Study on two-rotor interaction of counter-rotating horizontal axis tidal turbine

Energy, 2022
Xiaodong Liu, Haitao Zhao, Yulin Si
exaly