# ENGRMAE 108 Aerospace Laboratory (2014-2015)

#### ENGRMAE 108 Aerospace Laboratory

**ENGRMAE 108 Aerospace Laboratory (Credit Units: 4)** Analytical and experimental investigation in aerodynamics, fluid dynamics, and heat transfer. Emphasis on study of flow over objects and lift and drag on airfoils. Introduction to basic diagnostic techniques. Report writing is emphasized. Design project is required. Materials fee. Prerequisite: MAE130B. Aerospace Engineering and Mechanical Engineering majors have first consideration for enrollment. (Design units: 2)

- Fox, R.W., McDonald, A.T. and Pritchard, P.J. Introduction to Fluid Mechanics, 6th Edition, John Wiley & Sons, 2004.
- Bertin, J.J. Aerodynamics for Engineers, 4th Edition, Prentice Hall, 2002.
- Holman, J.P. Experimental Methods for Engineers, 7th Edition, McGraw-Hill, 2001.

1. Understand low speed wind tunnel design, instrumentation, and use. (EAC b)

2. Apply basic fluid mechanics theory (Bernoulli equation, potential flow theory, Blasius solution, etc.) to real wind tunnel flows. (EAC b)

3. Apply uncertainty and statistical analysis techniques. (EAC b)

4. Learn to work effectively in a small group / lab team. (EAC d)

5. Design and execute a laboratory low speed wind tunnel experiment that is technically relevant as demonstrated by relation published work. (EAC d, EAC i)

6. Understand through analysis and related experimentation the basics of airfoil and wing design and function. (EAC b)

- Fundamentals of Newtonian Mechanics
- Calculus and Differential Analysis
- Control Volume Analysis
- Basic analysis of viscous flows and means whereby aerodynamic forces are generated

- Course overview and discussion of wind tunnel and associated safety issues (10%)
- Bernoulli equation and potential flow, with emphasis on various pressure contributions, i.e. total, dynamic, static (10%)
- Analysis of Pitot and yaw tubes and use of associated differential pressure transducers (10%)
- Viscous flow and boundary layers with discussion of separation and means to control separation (10%)
- Uncertainly analysis and statistical analysis of data (20%)
- Operation and analysis of force balances (10%)
- Discussion of sources of drag in simple shapes such as spheres, cylinder, and streamlined objects (10%)
- Sources of lift and drag on airfoils, pitching moment, center of pressures, pressure distribution, and aerodynamic center (10%)
- Discussion of separation modes on airfoils and the effect of slats and flaps on lift, drag, and pitching moment (10%)

Meets for 3 hours of lecture, 1 hour of discussion and 3 hours of laboratory each week for 10 weeks.

Excel, Word, and LabView.

Use of Pitot and yaw tubes to: 1. Determine sensitivity of Pitot tube to misalignment; and 2. Determine flow uniformity and flow angle in test section of wind tunnel (15%). Calibration of force transducer, measurement of drag on spheres, cylinders and streamlined shapes (20%). Effect of three dimensional effects on measured drag of 2-D objects (10%). Effect of boundary layer trips on drag (10%). Measurement of lift, drag, and pitching moment on an airfoil (10%). Investigation of separation modes and their effects on drag and lift (5%). Determination of aerodynamic center (5%). Effect of slats and flaps on aerodynamic characteristics (5%). Measurement of pressure distribution on an airfoil (10%). Use of anemometry techniques for characterization of flow over objects and the resulting wake (10%).

Contributes toward the Mechanical Engineering Topics courses and Major design experience. Contributes toward the Aerospace Engineering Topics courses and Major design experience.

Design exercise chosen from a list provided to the students or can be student initiated. Provide motivation for choice of the design project and perform a literature review. Evaluate potential experimental procedures; justify choice of experimental procedure. Analysis of equipment and/or test apparatus prior to construction or use. Several oral and written progress reports; a final engineering report.

- Laboratory Reports: 40%
- Final Project: 25%
- Midterm Exam 1: 25%
- Midterm Exam 2: 10%
- Total: 100%

Mathematics and Basic Science: 0.0 credit units

Computing: 0.0 credit units

Engineering Topics: 4.0 credit units

Engineering Science: 2.0 credit units

Engineering Design: 2.0 credit units