Drag Reduction Application in Fire Fighting Systems

by Hillel Rubin, Sr. Res. Sci.; HYDRONAUTICS, Inc., Laurel, MD; on leave from Civ. Engrg. Dept., Technion, Haifa, Israel,

Serial Information: Journal of the Sanitary Engineering Division, 1972, Vol. 98, Issue 1, Pg. 1-9

Document Type: Journal Paper


Predictions concerning the maximum friction reduction by drag reducing polymeric additives are presented. It was found that in rough firehoses, a reduction of about 60% in friction losses can be obtained. Polymeric additives can be used in fire fighting systems in order to increase the flow rate. However, it seems that 1-1/2 in. firehoses cannot be made as effective as 2-1/2 in. firehoses by the addition of drag reducing polymers. Polymeric slurries can be used as drag reducing agents; however, in common firehoses about 400 pipe diameters are required to activate the polymers injected as polymeric slurry to the water flowing in the firehose.

Subject Headings: Polymer | Fires | Friction | Chemical additives | Slurries | Drag (fluid dynamics) | Flow rates | Water pipelines

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