Steam Nozzle Experiment

Department of Mechanical and Industrial Engineering Technology

Laboratory Report

Steam Nozzle Experiment

By

AT JAFTA

(Student No -201427383)

A laboratory report submitted

in partial fulfilment of the requirements for the module

THERMODYNAMICS IV (IMT 441)

FOR THE DEGREE OF BACHELOR OF

MECHANICAL ENGINEERING TECHNOLOGY

Submitted to

Module Lecturer Mr Bakaya Kyahurwa

DEPARTMENT OF MECHANICAL AND INDUSTRIAL ENGINEERING TECHNOLOGY

FACULTY OF ENGINEERING AND THE BUILT ENVIRONEMNT

UNIVERSITY OF JOHANNESBURG

Submitted: Wednesday 11th March, 2015

DECLARATION

I .. hereby declare that this laboratory report is wholly my own work and has not been submitted anywhere else for academic credit, either by myself or another person.

I understand what plagiarism implies and declare that this report embodies my own ideas, words, phrases, arguments, graphics, figures, results and organization except where reference is explicitly made to another work.

I understand further that any unethical academic behaviour, which includes plagiarism, is seen in a serious light by the University of Johannesburg and is punishable by disciplinary action as stipulated by the university rules and regulations.

Finally, I understand that fulfilment of this laboratory task complies with the objective of the ECSA ELO 4 and it must therefore be passed. I declare that this is not the product of a group work but is my own individual work.

Name: ..

Student No: . .

Signature: ..................................................

Date: ..............................................

]

TABLE OF CONTENTS

1DECLARATION

4INTRODUCTION

41.1.Aim

41.2.Theory behind the experiment

51.3.Apparatus

7SECTION TWO

7Table 1: Recorded Pressures and Absolute Pressures

8Recorded Temperature and Atmospheric Pressure

82.1 Results

82.1.1 Sample of Calculations

82.1.2 Theoretical Calculations

92.1.3 Experimental Calculations

13REFERENCES

LIST OF FIGURES

5figure 1: Steam Nozzle Experiment Apparatus

5figure 2 : Schematic Diagram of Nozzle and Dimensions

6figure 3: Converging-Diverging Nozzle configuration

11figure 4: Ms Excel Spreadsheet sample used to draw the m/a vs absolute pressure graph

11figure 5: M/A vs Absolute Pressure graph

SECTION ONE

INTRODUCTION1.1. Aim

The aim/objective of the laboratory task is to determine the following:

The mass flow rate of steam

Critical Velocity

Critical Pressure

After the values for the mass of flow rate of steam, critical velocity and pressure are obtained, the experimental values are then compared to the experimental values then conclusions whether then values correlate or not can be made.

1.2. Theory behind the experiment

According to Eastop & McConkey, a nozzle is a duct with a varying cross-sectional area in which a steadily flowing fluid can be made to accelerate by a pressure drop along a duct.

It can be assumed that the flow through a duct is subsonic since M