# ENGRMAE 136 Aerodynamics (2017-2018)

#### ENGRMAE 136 Aerodynamics

**ENGRMAE 136 Aerodynamics (Credit Units: 4)** Analysis of flow over aircraft wings and airfoils, prediction of lift, moment and drag. Topics: fluid dynamics equations; flow similitude; viscous effects; vorticity, circulation, Kelvin's theorem, potential flow; superposition principle, Kutta-Joukowski theorem; thin airfoil theory; finite wing theory; compressibility. Prerequisite: MAE130A, MAE130B. Aerospace Engineering and Mechanical Engineering majors have enrollment. (Design units: 1)

Bertin, John J. and Smith, Michael L. Aerodynamics for Engineers, 3rd Edition, Prentice Hall.

1. Develop a fundamental understanding of fluid mechanics as applied to the airplane: namely the source of lift, drag and moment; calculate them.

- Introduction to Fluid Mechanics
- Introduction to Viscous and Compressible Flows

- Introduction
- basic concepts
- aerodynamic forces and moments
- Fundamental Principles
- vector relations
- continuity, momentum, energy equations
- pathlines and streamlines
- vorticity and circulation
- stream function and velocity potential
- Potential Flow
- Bernoulli's eq, airspeed, pressure coefficient
- equations for incompressible flow
- elementary potential flow
- flow about a cylinder
- lift & the Kutta-Joukowski theorem
- real flow over a cylinder
- numerical source panel method
- Incompressible Flow over Airfoils
- airfoil characteristics
- airfoil representations as a vortex sheet
- Kutta condition & Kelvin's theorem
- thin airfoil theory
- numerical vortex panel method
- real airfoils
- Wing Theory
- downwash & induced drag
- Biot-Savart law & Helmholtz theorems
- Prandtl's lifting-line theory
- Compressible Flow over airfoils
- qualitative description of compressible flow, Mach number
- Prandtl-Glauert correction
- critical Mach number, drag divergence
- area rule, supercritical airfoils
- Effects of Viscosity
- qualitative description of viscous flow
- definition of the boundary layer
- skin friction & pressure drag

Meets for 4 hours of lecture and 1 hour of discussion each week for 10 weeks.

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

A proper understanding of aerodynamic lift, drag and moment is critical to the design of an airplane. Application of aerodynamic theory to the airplane design process is a regular topic, integral with the development of the theory itself.

- Homework: 25%
- Midterm Exam: 30%
- Final Exam: 45%
- Total: 100%

Mathematics and Basic Science: 0.0 credit units

Computing: 0.0 credit units

Engineering Topics: 4.0 credit units

Engineering Science: 3.0 credit units

Engineering Design: 1.0 credit units