GRAVITY VENTILATION OF UNDERGROUND SHELTERS

Abstract

Tests were conducted to determine the suitability of using gravity ventilation as an emergency method of providing air for survival in an underground shelter. The tests consisted of inducing through a simulated test shelter an airflow caused by (a) inside - outside temperature differentials, and (b) stack heaters in the exhaust duct. An additional test was made which involved a device to direct wind into the intake duct. It was found that wind blowing over the inlet and exhaust ducts created a negative pressure in the shelter that could not be satisfactorily overcome by the gravity methods used; thus, minimum ventilation rates could be obtained only when there was no wind blowing. In the tests conducted to utilize the wind, an NCEL-designed air inducer which mounts on the inlet duct provided satisfactory ventilation during normal weather conditions when there was a wind of 6 to 8 miles per hour.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1965
Accession Number
AD0613550

Entities

People

  • J. C. King

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Biomedical
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • California
  • Civil Defense
  • Civil Engineering
  • Department Of Defense
  • Emergencies
  • Energy
  • Engineering
  • Engineers
  • New York
  • Physics
  • Physics Laboratories
  • Test Facilities
  • United States
  • United States Naval Academy
  • Wind Energy
  • Wind Velocity

Fields of Study

  • Agricultural and Food sciences

Readers

  • Combustion and Flow Dynamics.
  • Nuclear Civil Defense.