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What are the effects of a change in the V-notch angle on the discharge equation and the accuracy of flow measurement?

What are the effects of a change in the V-notch angle on the discharge equation and the accuracy of flow measurement?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Theory The discharge of a V-notch is given by Q = C/2g 8 |2g tan 0 H³/2 (1) where Q=discharge (m/s), Ca=coefficient of discharge, 0=half-angle of the V-notch, H=water level measured from the vertex of the V-notch. Apparatus A V-notch fixed at the outlet of a channel, a rotameter and a water level gauge fixed on the side of the channel. What are the effects of a change in the V-notch angle on the discharge equation and the accuracy of flow measurement?
Transcribed Image Text:Theory The discharge of a V-notch is given by Q = C/2g 8 |2g tan 0 H³/2 (1) where Q=discharge (m/s), Ca=coefficient of discharge, 0=half-angle of the V-notch, H=water level measured from the vertex of the V-notch. Apparatus A V-notch fixed at the outlet of a channel, a rotameter and a water level gauge fixed on the side of the channel. What are the effects of a change in the V-notch angle on the discharge equation and the accuracy of flow measurement?
Introduction In hydraulic engineering, weirs are commonly used to regulate flow in rivers and other open channels. Where the relationship between the water level upstream of the weir and the discharge is known, the discharge at any time may be found by noting the upstream water level. Fig. 1 shows a V-shaped notch weir. Such notches usually have sharp edges so that the water springs clear of the plate as it passes through the notch. Objective To determine the relationship between the discharge and the water level of a V-notch 60mm 228mm H 20 Fig. 1
Transcribed Image Text:Introduction In hydraulic engineering, weirs are commonly used to regulate flow in rivers and other open channels. Where the relationship between the water level upstream of the weir and the discharge is known, the discharge at any time may be found by noting the upstream water level. Fig. 1 shows a V-shaped notch weir. Such notches usually have sharp edges so that the water springs clear of the plate as it passes through the notch. Objective To determine the relationship between the discharge and the water level of a V-notch 60mm 228mm H 20 Fig. 1
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