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Title: Foam formation in low expansion fire fighting equipment
Author: Rogers, Lucy
ISNI:       0000 0001 3532 9947
Awarding Body: Lancaster University
Current Institution: Lancaster University
Date of Award: 2001
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This thesis describes an investigation into the foam generation mechanisms involved in producing foam from a lox expansion fire fighting branchpipe. The investigation was carried out using scale models of branchpipes, and a high-speed video camera was used to study the formation of the foam. The experiments provided evidence of three possible methods of bubble formation : Stage 1 - Mixing within the branchpipe Stage 2 - Air entrainment and bubble growth during the flight of the jet Stage 2 - Aeration produced from the collision of the high speed jet onto a surface Each stage is described in detail and the mechanism which has the greatest effect on the expansion ratio of the foam produced has been determined. The relevance of these findings to the design of branchpipes is discussed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
Keywords: Safety engineering