Long-range firefighting hose with a spiral flow

Application: firefighting.

Advantages: increases the maximum long-range in 1.5–2 times; significantly increases the efficiency and safety of high complexity firefighting.

Key features: optimum size of the oval cross-section has an aspect ratio of the axes – 1:3; hydraulic resistance coefficient for rectangular cross-section is reduced by 10–15 %, for an oval cross-section it’s reduced by 25–40 % (compared with a circular cross-section); oval jet has a maximum long-range.

Developed: Department of Shipbuilding and Hydraulics, Supervisor – Prof. Dr. Igor Kachanov, D.Sc.

Tel.: +375 17 292 76 77, fax: +375 17 292 76 77, e-mail: hidrokaf@bntu.by.