Rise-up Characteristics of Self-Standing Water Jet Firefighting Hose

Abstract

In this study, we have investigated a water jet self-standing firefighting hose that can provide a solid water stream easily and safely from on the ground to fires occurring at a second or third floor in houses and buildings. The flexible vinyl hose at whose end a L-shaped nozzle is attached obtains a force coming from a water flow through the bent part of the nozzle. The force makes the hose bow-shaped, and it stands steadily by itself. As a result, the nozzle exit rises up and the water jet is delivered from higher location to the burning area. In this experiment, the rise-up characteristics of the self-standing water jet hose was examined by varying the hose length, the nozzle length and the mass of the nozzle. The data was organized with two different types of non-dimensional parameters.