Helicopter brownout - can it be modelled?

R.E. Brown, Catriona Phillips, Hyo Wan Kim

Research output: Contribution to conferencePaper

Abstract

Significant progress has been made to date in modelling, computationally, the formation and development of the dust cloud that forms in the air surrounding the rotorcraft under brownout conditions. Modern computational methods are able to replicate not only the development of the dust cloud in appropriate operational scenarios, but also the sensitivity of the shape and density of the dust cloud to the detailed design of the rotorcraft. Results so far suggest that attempts to ameliorate brownout by aerodynamic means, for instance by modifying the rotor properties, will be frustrated to some extent by the inherent instability of the °flow field that is produced by the helicopter. Nonetheless, very recent advances in understanding the fundamental mechanisms that lead to the formation of the dust cloud may allow substantial progress to be made once certain elements of the basic physics of the problem are more fully understood and better quantified.

Conference

ConferenceRoyal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment
CityLondon, UK
Period16/06/1017/06/10

Fingerprint

Helicopter
Helicopters
Dust
Computational methods
Aerodynamics
Computational Methods
Rotor
Flow Field
Flow fields
Physics
Rotors
Scenarios
Air
Modeling

Keywords

  • flow field
  • brownout conditions
  • dust cloud formation
  • rotorcraft

Cite this

Brown, R. E., Phillips, C., & Kim, H. W. (2010). Helicopter brownout - can it be modelled?. Paper presented at Royal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment, London, UK, .
Brown, R.E. ; Phillips, Catriona ; Kim, Hyo Wan. / Helicopter brownout - can it be modelled?. Paper presented at Royal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment, London, UK, .13 p.
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title = "Helicopter brownout - can it be modelled?",
abstract = "Significant progress has been made to date in modelling, computationally, the formation and development of the dust cloud that forms in the air surrounding the rotorcraft under brownout conditions. Modern computational methods are able to replicate not only the development of the dust cloud in appropriate operational scenarios, but also the sensitivity of the shape and density of the dust cloud to the detailed design of the rotorcraft. Results so far suggest that attempts to ameliorate brownout by aerodynamic means, for instance by modifying the rotor properties, will be frustrated to some extent by the inherent instability of the °flow field that is produced by the helicopter. Nonetheless, very recent advances in understanding the fundamental mechanisms that lead to the formation of the dust cloud may allow substantial progress to be made once certain elements of the basic physics of the problem are more fully understood and better quantified.",
keywords = "flow field, brownout conditions, dust cloud formation, rotorcraft",
author = "R.E. Brown and Catriona Phillips and Kim, {Hyo Wan}",
note = "Session 5-Paper 17; Royal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment ; Conference date: 16-06-2010 Through 17-06-2010",
year = "2010",
month = "6",
day = "16",
language = "English",

}

Brown, RE, Phillips, C & Kim, HW 2010, 'Helicopter brownout - can it be modelled?' Paper presented at Royal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment, London, UK, 16/06/10 - 17/06/10, .

Helicopter brownout - can it be modelled? / Brown, R.E.; Phillips, Catriona; Kim, Hyo Wan.

2010. Paper presented at Royal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment, London, UK, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Helicopter brownout - can it be modelled?

AU - Brown, R.E.

AU - Phillips, Catriona

AU - Kim, Hyo Wan

N1 - Session 5-Paper 17

PY - 2010/6/16

Y1 - 2010/6/16

N2 - Significant progress has been made to date in modelling, computationally, the formation and development of the dust cloud that forms in the air surrounding the rotorcraft under brownout conditions. Modern computational methods are able to replicate not only the development of the dust cloud in appropriate operational scenarios, but also the sensitivity of the shape and density of the dust cloud to the detailed design of the rotorcraft. Results so far suggest that attempts to ameliorate brownout by aerodynamic means, for instance by modifying the rotor properties, will be frustrated to some extent by the inherent instability of the °flow field that is produced by the helicopter. Nonetheless, very recent advances in understanding the fundamental mechanisms that lead to the formation of the dust cloud may allow substantial progress to be made once certain elements of the basic physics of the problem are more fully understood and better quantified.

AB - Significant progress has been made to date in modelling, computationally, the formation and development of the dust cloud that forms in the air surrounding the rotorcraft under brownout conditions. Modern computational methods are able to replicate not only the development of the dust cloud in appropriate operational scenarios, but also the sensitivity of the shape and density of the dust cloud to the detailed design of the rotorcraft. Results so far suggest that attempts to ameliorate brownout by aerodynamic means, for instance by modifying the rotor properties, will be frustrated to some extent by the inherent instability of the °flow field that is produced by the helicopter. Nonetheless, very recent advances in understanding the fundamental mechanisms that lead to the formation of the dust cloud may allow substantial progress to be made once certain elements of the basic physics of the problem are more fully understood and better quantified.

KW - flow field

KW - brownout conditions

KW - dust cloud formation

KW - rotorcraft

M3 - Paper

ER -

Brown RE, Phillips C, Kim HW. Helicopter brownout - can it be modelled?. 2010. Paper presented at Royal Aeronautical Society Rotorcraft Group Conference: Operating Helicopters Safely in a Degraded Visual Environment, London, UK, .