DTIC ADA035785: Air Velocity and Convective Cooling pdf

DTIC ADA035785: Air Velocity and Convective Cooling_bookcover

DTIC ADA035785: Air Velocity and Convective Cooling

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The Environment Subcommittee of the Royal Naval Personnel Research Committee is reviewing and rationalising requirements for extreme-cold-weather clothing in ships. It is generally thought that flight-deck personnel concerned with helicopter operations in ships at sea are those most adversely affected by cold. The protection required by these crews is likely to be one of the base factors in deciding the overall extent of the clothing protection that is needed. Flight-deck personnel can be subjected to temperatures in the range -15 C to +10 C for periods of up to 6 hours. They may be exposed to wind speeds of up to 50 knots in addition to the down-draught and outwash created by the helicopter itself. As a preliminary to land and sea trials designed to assess particular garment assemblies suitable for use in these environments, a study has been made to measure the wind strengths and convective cooling coefficients found beneath a helicopter operating on land in a temperate climate.

This paper reports the results of these experiments which were performed beneath a Sea King helicopter at A and AEE Boscombe Down on 18 September 1975. (Author

  • Creator/s: Defense Technical Information Center
  • Date: 1/1/1976
  • Year: 1976
  • Book Topics/Themes: DTIC Archive, Clark, R P, Mullan, B J, Goff, M R, ROYAL NAVAL PERSONNEL RESEARCH COMMITTEE LONDON (ENGLAND), *HELICOPTERS, *CONVECTION(HEAT TRANSFER), *PROTECTIVE CLOTHING, NAVAL PERSONNEL, COLD WEATHER OPERATIONS, WIND, TEST METHODS, COOLING, EXPOSURE(PHYSIOLOGY), AIRCRAFT LANDINGS, ANEMOMETERS, DOWNWASH, FLIGHT DECKS, WIND CHILL, UNITED KINGDOM

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