# ENGRMAE 135 Compressible Flow (2017-2018)

#### ENGRMAE 135 Compressible Flow

**ENGRMAE 135 Compressible Flow (Credit Units: 4)** Compressibility effects in fluid mechanics. One-dimensional flow with area variation, friction, heat transfer, and shocks. Design of gas supply systems. Two-dimensional flow with oblique shocks and isentropic waves. Supersonic airfoil theory and design, wind tunnel design. Basic diagnostics. Prerequisite: ENGRMAE130B. Aerospace Engineering and Mechanical Engineering majors have first consideration for enrollment. (Design units: 1)

1. Apply the fundamentals of compressible flow.

2. Analyze and design devices/systems involving gas delivery, internal and external nozzle flows, and airfoil performance.

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

- First and second Laws of Thermodynamics; reversible and irreversible processes; equation of state; Gibbs relation
- Conservation equations for quasi-one-dimensional (Q1D) flow; definition of speed of sound; definition of Mach number; concepts of total temperature and total pressure
- Isentropic Q1D flow; area-velocity and area-Mach number relations.
- Mass flow rate relations for convergent nozzle
- One dimensional flow with friction and heat transfer; Fanno and Rayleigh lines
- Normal-shock relations
- Oblique shock theory
- Isentropic waves: compression and expansion. Prandtl-Meyer function.
- Airfoil shock-expansion theory; thin airfoil theory
- Internal and external nozzle flows; wave reflections; method of characteristics
- Supersonic nozzle design; wind tunnel design; basic flow diagnostics

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

Spreadsheet analysis and plotting

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

Overview of the design of practical applications such as gas flow regulators, piping systems, wind tunnels, jet engines, rocket engines, and airfoils. Both homework and design assignments include problems on devices/systems relevant to the aforementioned applications.

- Homework: 25%
- Midterm Exam: 25%
- Design Project: 15%
- Final Exam: 35%
- 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