Study of the Effects of Various Propeller Configurations on the Flow About a Shroud

Mcnay, David E.

doi:10.21236/ad0219121

Cited by 2 publications

(1 citation statement)

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“…This idea that higher velocities toward the outboard blade sections may create higher total system thrust is not entirely new, although several separate experimental investigations have only led to conflicting results. 6,[22][23][24] The objective of this paper is to investigate the effect of duct-rotor aerodynamic interactions on the performance and efficiency of multiple duct-rotor configurations in hover and axial flight. This is accomplished by examining how the rotor inflow is modified with and without the presence of the duct.…”

Section: Introductionmentioning

confidence: 99%

Effect of Duct-Rotor Aerodynamic Interactions on Blade Design for Hover and Axial Flight

Jimenez¹,

Singh

2015

53rd AIAA Aerospace Sciences Meeting

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Computational analysis of several ducted rotor systems is performed to determine the effect of rotor inflow on thrust generation in hover and axial flight. An outboard-biased rotor inflow has been shown to increase the performance of a hovering ducted rotor system. The duct-rotor aerodynamic interactions and their resulting effects on rotor inflow are studied to provide insights on duct-rotor design. Multiple duct-rotor configurations are studied using high-fidelity CFD in hover and axial flight for various twist distributions and increasing rotor collective values. Performance and efficiency gains are shown for multiple duct-rotor configurations in hover. Rotor inflow calculations show an outboard bias that allows rotors to be operated more efficiently for a range of collective angles. Benefits of outboard-biased rotor inflow in axial flight for a fixed collective were minimal. This analysis shows the extent to which performance and efficiency benefits are achieved for a ducted rotor based on the behavior of rotor inflow.

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Section: Introductionmentioning

confidence: 99%