Experimental Studies of Tip-Vortex Formation: Influence of Blade-Tip Geometry on the Vortex Characteristics

David Cousin; Michael Morikone; Stephen Hirst; Jamison Elder; Marcel Ilie

doi:10.2514/6.2011-1253

Experimental Studies of Tip-Vortex Formation: Influence of Blade-Tip Geometry on the Vortex Characteristics

David Cousin, Michael Morikone, Stephen Hirst, Jamison Elder, Marcel Ilie

Mechanical Engineering

University of Central Florida

Research output: Contribution to book or proceeding › Chapter

Abstract

Noise generation remains a major concern in the design of modern rotorcrafts. One of the major noise sources is associated with the blade-vortex interaction (BVI) phenomenon. The present study concerns the investigation of tip vortex formation and development of passive flow control technique for the reduction of strength and vortex core size. Two measurement techniques: laser sheeting photography and velocity measurements utilizing a hot-wire anemometer, were conducted in a low-speed wind tunnel environment to determine vortex size. Five different blade-tip geometries were subject of investigation. The study shows that the polyhedral blade was deemed the most efficient due to the decrease in overall vortex velocity. Numerical studies using large-eddy simulation approach are in progress.

Original language	American English
Title of host publication	Proceedings of the Aerospace Sciences Meeting
DOIs	https://doi.org/10.2514/6.2011-1253
State	Published - Jan 4 2011

Disciplines

Mechanical Engineering

Keywords

Blade-tip geometry
Tip-vortex formation
Vortex characteristics

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10.2514/6.2011-1253License: Unspecified

Cite this

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title = "Experimental Studies of Tip-Vortex Formation: Influence of Blade-Tip Geometry on the Vortex Characteristics",

abstract = " Noise generation remains a major concern in the design of modern rotorcrafts. One of the major noise sources is associated with the blade-vortex interaction (BVI) phenomenon. The present study concerns the investigation of tip vortex formation and development of passive flow control technique for the reduction of strength and vortex core size. Two measurement techniques: laser sheeting photography and velocity measurements utilizing a hot-wire anemometer, were conducted in a low-speed wind tunnel environment to determine vortex size. Five different blade-tip geometries were subject of investigation. The study shows that the polyhedral blade was deemed the most efficient due to the decrease in overall vortex velocity. Numerical studies using large-eddy simulation approach are in progress.",

keywords = "Blade-tip geometry, Tip-vortex formation, Vortex characteristics",

author = "David Cousin and Michael Morikone and Stephen Hirst and Jamison Elder and Marcel Ilie",

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doi = "10.2514/6.2011-1253",

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T1 - Experimental Studies of Tip-Vortex Formation: Influence of Blade-Tip Geometry on the Vortex Characteristics

AU - Cousin, David

AU - Morikone, Michael

AU - Hirst, Stephen

AU - Elder, Jamison

AU - Ilie, Marcel

PY - 2011/1/4

Y1 - 2011/1/4

N2 - Noise generation remains a major concern in the design of modern rotorcrafts. One of the major noise sources is associated with the blade-vortex interaction (BVI) phenomenon. The present study concerns the investigation of tip vortex formation and development of passive flow control technique for the reduction of strength and vortex core size. Two measurement techniques: laser sheeting photography and velocity measurements utilizing a hot-wire anemometer, were conducted in a low-speed wind tunnel environment to determine vortex size. Five different blade-tip geometries were subject of investigation. The study shows that the polyhedral blade was deemed the most efficient due to the decrease in overall vortex velocity. Numerical studies using large-eddy simulation approach are in progress.

AB - Noise generation remains a major concern in the design of modern rotorcrafts. One of the major noise sources is associated with the blade-vortex interaction (BVI) phenomenon. The present study concerns the investigation of tip vortex formation and development of passive flow control technique for the reduction of strength and vortex core size. Two measurement techniques: laser sheeting photography and velocity measurements utilizing a hot-wire anemometer, were conducted in a low-speed wind tunnel environment to determine vortex size. Five different blade-tip geometries were subject of investigation. The study shows that the polyhedral blade was deemed the most efficient due to the decrease in overall vortex velocity. Numerical studies using large-eddy simulation approach are in progress.

KW - Blade-tip geometry

KW - Tip-vortex formation

KW - Vortex characteristics

UR - https://doi.org/10.2514/6.2011-1253

U2 - 10.2514/6.2011-1253

DO - 10.2514/6.2011-1253

M3 - Chapter

BT - Proceedings of the Aerospace Sciences Meeting

ER -

Experimental Studies of Tip-Vortex Formation: Influence of Blade-Tip Geometry on the Vortex Characteristics

Abstract

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Keywords

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