Discharge Through an Orifice

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Formal Lab #1

Prepared By:

Eduardo Hernandez

CE 343 – Hydraulics Lab

T.A: Ankit Ghanghas

October 15, 2021,

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Synopsis/Abstract

Using the Bernoulli equation, this study investigates various types of orifices and their impact on

flow rate. The velocity, flow rate, velocity constant Cv, and discharge coefficient Cd were calculated

using experimental data from a beveled edge and sharp-edged orifice. These constants are used to

compensate for assumptions made in order to make computations easier. The experiment found that

Bernoulli’s theorem may be used to compute velocity, and that the assumptions made correct the

experiment through the coefficients. The corrective coefficients of two distinct edged orifices were varied.

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Table of Contents

Introduction…………………………………………………………………………………….. 4

Theoretical Background………………………………………………………………………… 5

Description of Experiment……………………………………………………………………… 7

Results/Discussion………………………………………………………………………………. 8

Conclusion……………………………………………………………………………………….. 11

References……………………………………………………………………………………….. 12

Appendix………………………………………………………………………………………… 12

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Introduction

Civil hydraulics engineers must be familiar with the flow over or through an orifice, as well as the

concepts that govern this flow. An orifice is a closed hole in the wall of a tank or plate that is

perpendicular to the flow of the fluid. This laboratory study analyzed the variables that influence flow rate

across an aperture. These are the velocity coefficient, the contraction coefficient, and the discharge

coefficient, as well as the speed of the water approaching the orifice, the depth of the water, the area of

the orifice, the kind of orifice edge, and the velocity coefficient.