sem 3 sylla

1 AO7017 EXPERIMENTAL AERODYNAMICS L T P C 3 0 0 3 UNIT I BASIC MEASUREMENTS IN FLUID MECHANICS Objective of experimental studies – Fluid mechanics measurements – Properties of fluids – Measuring instruments – Performance terms associated with measurement systems – Direct measurements - Analogue methods – Flow visualization – Components of measuring systems – Importance of model studies - Experiments on Taylor-Proudman theorem and Ekman layer – Measurements in boundary layers. UNIT II WIND TUNNEL MEASEUREMENTS Characteristic features, operation and performance of low speed, transonic, supersonic and special tunnels - Power losses in a wind tunnel – Instrumentation and calibration of wind tunnels – Turbulence- Wind tunnel balance – Principle and application and uses – Balance calibration. UNIT III FLOW VISUALIZATION AND ANALOGUE METHODS Visualization techniques – Smoke tunnel – Hele-Shaw apparatus - Interferometer – Fringe- Displacement method – Shadowgraph - Schlieren system – Background Oriented Schliren (BOS) System - Hydraulic analogy – Hydraulic jumps – Electrolytic tank. UNIT IV PRESSURE, VELOCITY AND TEMPERATURE MEASUREMENTS Pitot-Static tube characteristics - Velocity measurements - Hot-wire anemometry – Constant current and Constant temperature Hot-Wire anemometer – Hot-film anemometry – Laser Doppler Velocimetry (LDV) – Particle Image Velocimetry (PIV) – Pressure Sensitive Paints – Pressure measurement techniques - Pressure transducers – Temperature measurements. UNIT V DATA ACQUISITION SYSTEMS AND UNCERTAINTY ANALYSIS Data acquisition and processing – Signal conditioning - Estimation of measurement errors – Uncertainty calculation - Uses of uncertainty analysis. REFERENCES 1. Rathakrishnan, E., “Instrumentation, Measurements, and Experiments in Fluids,”CRC Press – Taylor & Francis, 2007. 2. Robert B Northrop, “Introduction to Instrumentation and Measurements”, Second Edition, CRC Press, Taylor & Francis, 2006.

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8/10/2019 sem 3 sylla

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AO7014 EXPERIMENTAL STRESS ANALYSIS L T P C3 0 0 3

UNIT I INTRODUCTION

Principle of measurements-Accuracy, sensitivity and range- Mechanical, Optical, Acoustical and ElectricalextensometersUNIT II ELECTRICAL RESISTANCE STRAIN GAUGES

Principle of operation and requirements-Types and their uses-Materials for strain gauge- Calibration andtemperature compensation-Cross sensitivity-Rosette analysis-Wheatstone Bridge- Potentiometer circuits for

static and dynamic strain measurements-Strain indicators- Application of strain gauges to wind tunnel balance.

UNIT III PRINCIPLES OF PHOTOELASTICITY

Two dimensional photo elasticity-Concepts of photoelastic effects-Photoelastic materials-Stress optic law-

Plane polariscope – Circular polariscope-Transmission and Reflection type-Effect of stressed model in Plane

and Circular polariscope. Interpretation of fringe pattern Isoclinics and Isochromatics.-Fringe sharpening and

Fringe multiplication techniques-Compensation and separation techniques-Introduction to three dimensional

photoelasticity.UNIT IV PHOTOELASTICITY AND INTERFEROMETRY TECHNIQUES

Fringe sharpening and Fringe multiplication techniques-Compensation and separation techniques- Calibration

methods – Photo elastic materials - Introduction to three dimensional photoelasticity - Moire fringes – Laser

holography – Grid methods-Stress coat

UNIT V NON DESTRUCTIVE TECHNIQUES

Radiography- Ultrasonics- Magnetic particle inspection- Fluorescent penetrant technique-Eddy current

testing – thermography – MICRO FOCUS CT scan.

REFERENCES

1. J.W. Dally and M.F. Riley, “Experimental Stress Analysis”, McGraw -Hill Book Co., New York,1988

2. Srinath,L.S., Raghava,M.R., Lingaiah,K. Gargesha,G.,Pant B. and Ramachandra,K. – Experimental Stress

Analysis, Tata McGraw Hill, New Delhi, 1984

3. P. Fordham, “Non -Destructive Testing Techniques” Business Publications, London, 1988.

4. M. Hetenyi, “Handbook of Experimental Stress Analysis”, J ohn Wiley & Sons Inc., New York 1980

5. G.S. Holister, “Experimental Stress Analysis, Principles and Methods”, Cambridge University Press, 1987

6. A.J. Durelli and V.J. Parks, “Moire Analysis of Strain”, Prentice Hall Inc., Englewood Cliffs, New Jersey,

1980

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