Experiment 5 flow through small orifice
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Experiment (5) Flow through small orifice . By: Eng. Motasem M. Abushaban. Eng. Fedaa M. Fayyad . Introduction . An Orifice is an opening in the side or base of tank or reservoir through which fluid is discharge in the form of a jet.

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Experiment 5 flow through small orifice

Experiment (5)Flow through small orifice

By:

Eng. Motasem M. Abushaban.

Eng. Fedaa M. Fayyad.


Introduction
Introduction

  • An Orifice is an opening in the side or base of tank or reservoir through which fluid is discharge in the form of a jet.

  • The discharge will depend upon the head of the fluid (H) above the level of the orifice.

  • The term small orifice means that the diameter of the orifice is small compared with the head producing flow.


Purpose
Purpose

  • Studying the flow through small orifice discharging to atmosphere.

  • Calculating the coefficient of discharge (Cd).

  • Calculating the coefficient of velocity (Cv).

  • Calculating the coefficient of contraction (Cc)



Theory1

,

Theory

  • Two reasons for the difference between theoretical and actual discharge.

  • First: The velocity of jet is less than the velocity calculated because there is losses of energy between point A and B.

    ,Cvis the coefficient of velocity


Theory2
Theory

  • Second: The stream line of the orifice contract reducing the area of flow. (Vena Contraction)

    Where. Ccis the coefficient of contraction.

    Cd in the range [0.6-0.65]





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