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Nozzle Report

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Submitted By Ribz17
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DEN 306 AIRCRAFT PROPULSION
NOZZLE THRUST EXPERIMENT
ASAD SHAHID
090174120

Table of Contents Introduction 3 Objective 3 Background Theory 4 Derivation of the theoretical value of thrust 6 Apparatus 9 Experimental Procedure 10 Sample Calculations 11 Results 14 Graphs 17 Discussion 19 Conclusion 20 References 20

Introduction

Nozzles are used in everyday life, whether they are in the form of a garden hose or in rockets. They are used extensively in rockets and turbo jet engines. Nozzles come in several different types, whether its convergent, divergent, convergent –divergent and divergent-convergent nozzle. Convergent nozzles are used to accelerate subsonic flow to sonic (m=1) and a convergent divergent nozzle accelerates the flow from sonic to supersonic.
This investigation looks into the flow of a fluid through a converging nozzle therefore subsonic and sonic flow will be considered.

Objective

To study the thrust produced by a convergent nozzle operating under both subsonic and choked conditions.
This was achieved using three methods; firstly by calculating the volumetric flow rate (Q) for each condition then plotting these results against the pressure ratio. From these graphs the Mach number can be deduced at the throat of the nozzle. At the throat of the nozzle is also where choking occurs when the appropriate conditions are applied. The last step is to produce a graph of non-dimensional thrust for each condition against the pressure ratio.

Background Theory

A nozzle is a mechanical device that is designed to control the characteristics of a fluid as it exits from an enclosed chamber into a different medium.
All gas turbine engines have nozzles that produce thrust, to conduct the exhaust gases back to the free stream and to set the mass flow rate through the engine. The nozzle is usually located downstream of the

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