Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-053008-142400

Document Typethesis
Author NameCrocker, Jeremiah
Email Address jeremiah.crocker at tycofp.com
TitleThe Effect of Sprinkler Sprays on Fire Induced Mass Flow Rates
DepartmentFire Protection Engineering
  • Professor Ali Rangwala, Advisor
  • David LeBlanc, Co-Advisor
  • Professor Nicholas Dembsey, Co-Advisor
  • Professor Kathy Notarianni, Department Head
  • Keywords
  • Performance Based Design
  • Sprinkler Spray
  • Vent Flow
  • Date of Presentation/Defense2008-04-28
    Availability unrestricted


    Performance based methodologies are becoming increasingly common in fire safety due to the inability of prescriptive codes to account for every architectural feature. Fire Sprinkler suppression systems have long been used to provide property protection and enhance life safety. However, very few methodologies exist to account for the impact of sprinkler sprays on fire scenarios. Current methods are extremely complicated and difficult to use as an engineering tool for performance based design. Twenty four full scale fire tests were conducted at Tyco Fire Suppression & Building Products Global Technology Center to determine a simple method for accounting for the impact of a single residential sprinkler on fire induced doorway flows. It was found that a spraying sprinkler reduced the mass flows at the doorway while maintaining two stratified layers away from the sprinkler spray. The mass flow reduction was consistent and could be predicted through the use of a simple buoyancy based equation. The current study suggests that the buoyancy equation can be altered through the use of a constant cooling coefficient (equal to 0.84 for a Tyco LFII (TY2234) sprinkler) based on the test results reported in this paper. This study is a proof of concept and the results suggest the methodology can be applicable to similar situations.

  • jcrocker.pdf

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