An analysis is made of the benefits which can be obtained by ejecting the gases, displaced when petroleum is loaded into cargo tanks, at a high velocity so that they reach a height well above the ships' working areas. It has now been established that a minimum efflux velocity of 100 fps will provide adequate dispersal and it is proposed that this velocity is achieved by installing a variable nozzle in each outlet in which tank pressure is used to provide a vent area proportional to the loading rate. The theory of mixing which takes place in turbulent jets in still air is considered and a study of previous experimental results relating efflux velocity to projection length and entrainment ratio is reviewed.

  • Corporate Authors:

    Royal Institution of Naval Architects

    10 Upper Belgrave Street
    ,   United States 
  • Authors:
    • Martin, W S
  • Publication Date: 1970-7

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00019130
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 29 1971 12:00AM