Course Details
Subject {L-T-P / C} : ME6347 : Thermal Measurements { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. S. Murugan
Syllabus
MODULE 1 GENERAL CONCEPTS
Fundamental elements of a measuring instrument. Static and dynamic characteristics, Errors in instruments,. calibration, uncertainty analysis, error propagation, Gaussian or Normal distribution, confidence level, regression analysis, correlation coefficient, Chi-Square test, zeroth-,first- and second-order systems.
MODULE 2 PRESSURE MEASUREMENTS
Sensing elements and transducers. Measurement of pressure – principles of pressure measurement, static and dynamic pressure, vacuum and high pressure measuring – Measurement of low pressure, Manometers, Calibration methods, Dynamic characteristics- design principles.
MODULE 3 MEASUREMENT OF FLOW
Positive displacement flow meters, venture, orifice, impact tube, flow nozzle, sonic nozzle, rotameter, pitot static tube, hot-wire anemometer, laser Doppler anemometer, flow visualization techniques – shadowgraph, Schlieren and interferometer.
MODULE 4 TEMPERATURE MEASUREMENT
Different principles of Temperature Measurement, use of bimetallic thermometers – Mercury thermometers, Vapor Pressure thermometers, Thermo positive elements, thermocouples in series & parallel, pyrometry, measurement of heat flux, calibration of temperature measuring instruments. Design of temperature measuring instruments.
MODULE 5 ADVANCED MEASUREMENTS AND DATA ACQUISITION
Measuring devices used to measure pollutants such as carbon monoxide, carbon dioxide, unburnt hydrocarbon, oxides of nitrogen, smoke and particulates, in-cylinder pressure etc. Signal conditioning, data transmission, storage, A to D and D to A conversion, design of experiments.
Course Objectives
- To educate the students the need of measurement, elements of a measuring instrument, different errors, different methods to analyze errors and uncertainty, basics of statistical data.
- To make the students to understand pressure measurement devices, different flow level measuring devices, temperature measuring devices.
- To make the students to learn emission measuring instruments and engine in cylinder measurements .
- To make the students to learn on collection and processing of data,data logger and data acquisition system used for laboratory and industrial applications. To make the students to learn on design of experiments and plan and conduct experiments.
Course Outcomes
At the end of the course, the students must be able to use different measuring instruments to measure pressure, temperature,flow and thermal parameters that are used in different fields such as industrial, commercial, engineering applications. The students must be able to carry out design of experiments, and able to plan and conduct higher level of experiments. The students must be able to acquire and process the measurement data and analyse using different statstical methods.
Essential Reading
- J. P. Holman, Experimental methods for engineers, Mc Graw Hill , Eigth Edition
- E.O. Doeblin, Mechanical and Industrial Measurements, McGraw Hill Higher Education , Fourth Edition
Supplementary Reading
- R.K. Jain, Mechanical and Industrial Measurements, Khanna Publishers
- Buck & Beckwith, Mechanical Measurements, Pearson