Rotor geometry and wake
Vertical-axis wind turbines in oblique flow: sensitivity to rotor geometry
... and wake dynamics, both in normal and in oblique flow, of three different vertical-axis wind turbines: one with a straight-bladed configuration, another with a curved-bladed configuration and another with a heli- ...
8
CiteSeerX — Wake Geometry Measurements and Analytical Calculations on a Small-Scale Rotor Model
... the rotor wake behind a scale model helicopter rotor in forward level flight at one thrust ...The rotor system in this test consisted of a four-bladed fully articulated hub with blades of ...
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Wake dynamics and rotor-fuselage aerodynamic interactions
... the rotor and fuselage; these unsteady loads can lead to deficiencies in handling qualities and unacceptable vibratory characteristics of the ...the wake dynamics in the presence of a fuselage, as well as ...
19
Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight
... The geometry of the rotor system, along with the range of advance ratios that were studied, was chosen to be similar to those used during the HELIFLOW experiments in order that qualitative comparisons with ...
13
Impact of wake modeling uncertainty on helicopter rotor aeroacoustic analysis
... Two distinct cases have been defined for uncertainty analysis: (a) when experimental data about the geometry of tip vortex core are available and (b) when experimental data are absent. For both cases uncertainty ...
14
Predicting the wake structure of the HART II rotor using the vorticity transport model
... the wake to a suitable level of precision and ...the geometry of the wake system, the resultant rotor blade loading and the radiation of acoustic noise for the HART II rotor ...the ...
17
Unsteady Loads Evaluation for a Wind Turbine Rotor using free wake method
... the rotor wake is discretized into vortex filaments defined by a series of Lagrangian ...the wake of the prescribed method, we calculate explicitly the tip vortex ...the wake has a helical ...
9
An Approach for the Verification and Validation of Rotor Aerodynamics Codes Based On Free-Wake Vortex Methods
... vortical wake positions predicted for different values of ( δ v ,S c ) with the tip-vortex locations measured using the smoke visualization experiments ...the wake expansion, even though such parameters did ...
15
Wind Tunnel Measurements of the Wake of a Full-Scale UH-60A Rotor in Forward Flight
... Description of PIV System The stereo PIV system design was largely driven by constraints imposed by the 40- by 80-Foot Wind Tunnel test section geometry and facility infrastructure. Details of the installation and ...
5
Towards the prediction of noise from realistic rotor wake/stator interaction using CAA
... of wake-stator noise is a demanding problem due to the highly nonuniform swirling flow upstream of the stator vanes and the loaded, complex geometry stator ...incoming rotor wakes are decomposed into ...
11
Panel/full-span free-wake coupled method for unsteady aerodynamics of helicopter rotor blade
... the wake and blades on sectional thrust distributions is observed on the advancing side at azimuths of around 60–100 and on the retreating side at around ...blade geometry, there is a discrepancy among ...
9
Reprint of: Towards the Prediction of Noise from Realistic Rotor Wake/Stator Interaction Using CAA
... of wake-stator noise is a demanding problem due to the highly nonuniform swirling flow upstream of the stator vanes and the loaded, complex geometry stator ...incoming rotor wakes are decomposed into ...
11
Assessment of Geometry and In-Flow Effects on Contra-Rotating Open Rotor Broadband Noise Predictions
... turbulent rotor wake interactions and rotor blade trailing edges is per- formed on the historical baseline F31/A31 contra-rotating open rotor ...actual rotor blade sec- tional ...
20
Comparison of a RANS blade element model for tidal turbine arrays with laboratory scale measurements of wake velocity and rotor thrust
... for wake and mean thrust prediction has been assessed by comparison to experimental measurement for a single turbine and small arrays of ...single rotor variation of thrust coefficient with tip-speed ratio ...
20
Aeroacoustic analysis of main rotor-tail rotor interaction
... tail rotor noise and its aerodynamic sources. A generic single main rotor and tail rotor helicopter has been simulated in high speed forward, and quartering, flight using the Vorticity Transport ...
15
Rotor Wake Modelling Using the Vortex-Lattice Method
... a rotor in ground ...the rotor in extreme proximity to the ground, vortex rings were generated at the rotor hub and were released in periodic cycles, affecting the thrust generated by the ...particle ...
86
Unsteady aerodynamic wake of helicopter main-rotor-hub assembly
... ABSTRAK Fenomena getaran pada ekor helikopter merupakan suatu isu yang dipandang berat oleh para pengeluar helikopter kerana ia memberi kesan kepada prestasi keseluruhan dan kualiti kawalan helikopter, serta keselesaan ...
36
Power curve and wake analyses of the Vestas multi-rotor demonstrator
... (single) rotor di- ...two rotor diameters. Jamieson et al. (2014) simulated a 20 MW multi-rotor wind turbine consisting of 45 444 kW ...to rotor interactions, and the fact that smaller wind ...
21
Effect of Hydrofoil Trailing Edge Geometry on the Wake Dynamics
... the wake dynamics in the case of truncated and oblique trailing ...the wake centerline respectively to estimate the vortex core ...near wake of the oblique trailing edge is found to be almost two and ...
132
Geometry and topography in James Joyce's Ulysses and Finnegans Wake
... Euclidean geometry ‘lie in the prescientific cultural world’; similar to the pre-scientific heroes and deities which are mapped using points and lines in the night ...the Wake, reflections evoked by the ...
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