Q

CA2 V2gh

CA2 V2gh

C = coefficient of discharge for meter A2 = area of throat section, ft2 (m2) g = acceleration of gravity, 32.17 ft/s2 (9.81 m/s2) h = differential head of liquid between meter inlet and throat, ft (m) R = ratio of throat to inlet diameter (D2/D1) Q' = rate of flow, gpm A'2 = area of throat section, in2

Flow nozzles operate on the same basic principle as venturi meters. In effect, the flow nozzle is a venturi meter that has been simplified and shortened by omission of the long diffuser on the outlet side (Figure 10). The streamlined entrance of the nozzle provides a straight cylindrical jet without contraction, so the coefficient of discharge is almost the same as that for the venturi meter. In the flow nozzle, the jet is allowed to expand of its own accord, and the high degree of turbulence created downstream from the nozzle causes a greater loss of head than occurs in the venturi meter, where the diffuser suppresses turbulence. The relationship of flow rate to head and flow nozzle dimensions is

Survival Treasure

Survival Treasure

This is a collection of 3 guides all about survival. Within this collection you find the following titles: Outdoor Survival Skills, Survival Basics and The Wilderness Survival Guide.

Get My Free Ebook


Post a comment