CONSTRUCTION OF VENTURIMETER

ABSTRACT

The project was on the construction of a venturimeter. Venturimeter being a measuring instruction was used in determining the flow rate of fluid down a pipe or the rate of discharge in a pipeline and is often fixed permanently at different sections of the piple line to know the discharge there.

The research was made possible by the consultation of the internet, textbooks, and relevant information from friends.  The construction was based on these dimensions.

Throat diameter –       2.5cm

Thickness of metal sheet – 0.2cm

Length of diverging – 28.6m

Length of converging 24.cm.

The main purpose of this study was to respond to both the reality and preciption of venturimeter, also the scope and the uses are reviewed such as, how it works, it important and uses.

During the construction of these venturimeter machines like the drilling machines, smothering machines, were used in carrying out major operations of how drilling and smoothing enhanced the work with less time spent in operation like this.

Also manual tools and equipment such as the hack, saw, hand file, meter rule and maters was found to consume more time and back precious to the job.

CHAPTER ONE

INTRODUCTION

1.1    BACKGROUND OF STUDY

A venturi meter or venturi flow meter is a device used to measure the velocity, or flow rate, of fluid flowing through a pipeline. The venturi meter constricts the flow using a Herschel venturi tube. As the liquid flows through the pipeline, the device measures the pressure of liquid before it enters the venturi tube and as it exist the constricted area. These measurements are then compared to figure the volumetric flow rate of the fluid. The flow meter is commonly used in plumbing applications to determine the flow of fluids such as water, liquid propane, and oil.

For this procedure the venturi tube is typically a long pipe with conically shaped entry and exist points. The entry point is usually a thirty degree cone which constricts to five degree cone at the exit. The venturi meter result is less degradation of the head pressure due to the tube’s design.

The venturi mater can accurately measure flow rate using Bernoulli’s principle. bernoulli stated that the velocity of liquid increases in direct proportion to a decrease in pressure. When the liquid is forced through a constricted pipeline, it begins to make at a higher rate of speed because the majority of the pressure is held behind the constriction.

A common example of Bernoulli’s principle in action can be found in the nozzle of a garden hose. As the nozzle is turned fully open, the water glows slowly and usually falls just a short distance from the nozzle. When the nozzle is turned towards the closed position, it restricts the flow of the water and increases its velocity. The pressure held behind the nozzle builds and the velocity can carry the water for great distances.

CONSTRUCTION OF VENTURIMETER