Lab Manual v.3 - MAE 2381 RELEASE5 MECHANICAL AND AEROSPACE...

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M A E 2 3 8 1 R E L E A S E 5 2 / 3 / 2 0 0 9 1 MECHANICAL AND AEROSPACE ENGINEERING The University of Texas at Arlington MAE 2381 MECHANICAL METHODS AND MEASUEMENTS Laboratory Manual Frank K. Lu Michael Byron Webb Department of Mechanical and Aerospace Engineering University of Texas at Arlington Revised: February 3,2009
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M A E 2 3 8 1 R E L E A S E 5 2 / 3 / 2 0 0 9 2 Table of Contents 1 Metrology* . ........................................................................................ 3 2 Basic Digital Measurements 1 . ....................................................... 10 3 Basic Digital Measurements 2 . ....................................................... 28 4 Structural Dynamics Analysis . ....................................................... 40 5 Flow Rate Measurement . ................................................................ 58 6 Heat Transfer – Free and Forced Convection . ............................. 73 7 Introduction to LabVIEW . ............................................................. 83 8 Heat Transfer – Forced Convection (Impinging Hot Jet) . ........ 106 9 Thermal Conduction . .................................................................... 115
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M A E 2 3 8 1 R E L E A S E 5 2 / 3 / 2 0 0 9 3 1 Metrology* Dimensional measurements and uncertainty analysis The aim of this laboratory is to familiarize students with several geometrical measuring instruments and determine their accuracies, limitations, and capabilities. Note: This lab does not require a diagram of data flow for Lap prep. What you will learn 1. Principles of linear measurement 2. Uncertainty analysis 3. Elements of report writing 4. Introduction to instrument characteristics Equipment you need 1. Steel Rule 2. Vernier caliper 3. Micrometer caliper 4. Micrometer depth gauge 5. Manufactured “pin” for inspection Procedure In this lab, we will use instruments using the inch scale 1. Equipment List: Note down manufacturer’s name, serial and model numbers (if present) of all the instruments and the sample pin, so as to able to identify them precisely, including the specimen pin (select only. only one Figure 1.4 and use that particular one throughout this lab), the steel ruler, the Vernier caliper, the micrometer caliper and the micrometer depth gauge (refer to ). If no identification number is present, write down what is available. 2. Estimate the resolution (least count) accuracy of each of the provided measuring devices and record these values in your laboratory notebook. Verify the following. Steel Ruler (0.01 inch) Vernier Calipers (0.001 inch) (VC) Micrometer Calipers (0.001 inch) (MC) Micrometer Depth Gauge (0.001 inch) (MDG) For VC, MC, MDG, you will see that each inch is divided into 10 decimals, each decimal is divided into 4 quarters and each quarter is divided into 25 subdivisions, on the Vernier Scale on the VC or the circular scale in MC and MDG. So, 1 in./10/4/25 = 1/1000 inch. *Adapted from D. D. Seath, MAE 2181 Laboratory Manual, The University of Texas at Arlington, 1998 3. Note down the maximum reading of each instrument. Verify the following: steel ruler (6 in.), Vernier calipers (~5.2 in.), micrometer calipers (1.05 in.) and the micrometer depth gauge (1 in.). 4. Note down the zero error, if any of, all four instruments. What is zero error? If your car is sitting in the parking lot and the speedometer reads 5 mph, then the speedometer has a zero error of 5 mph. In this case, you have to subtract 5 every time you read the gauge. Similarly, for every analog instrument, one has to check for zero
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M A E 2 3 8 1 R E L E A S E 5 2 / 3 / 2 0 0 9 4 error before using it. In the event that an instrument has a zero error (negative or positive), one has to add or
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Lab Manual v.3 - MAE 2381 RELEASE5 MECHANICAL AND AEROSPACE...

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