# ME-417 Compressible Flow & Propulsion Systems

ME-417 COMPRESSIBLE FLOW & PROPULSION SYSTEMS

CREDIT HOURS

Theory = 3
Practical = 0

COURSE LEARNING OUTCOMES (CLOs)

 S. No. CLOs PLO Taxonomy 1 Explain different terms of compressible and isentropic flows PLO-1 Coginitive Level 2* 2 Solve cases of different non-isentropic flows such as normal / oblique shock and flows with friction or heat transfer PLO-2 Coginitive Level 3* 3 Analyze various shaft power and aircraft gas turbine engines with their environmental impact PLO-7 Coginitive Level 4*

COURSE CONTENT

• Governing equations for compressible fluid flow: conservation of mass, momentum and energy.
• Sonic velocity and Mach number, difference between incompressible, subsonic and supersonic flow, propagation of sound waves, equations for perfect gases in terms of Mach number, optical methods of investigation.
• Isentropic flow of a perfect gas, limiting conditions (choking), effect of area change on flow properties, flow in convergent and convergent-divergent nozzles, Hugoniot equation, applications of isentropic flow.
• Formation of shock waves, Weak and Strong waves, stationary and moving shock waves, working equations for perfect gases, operating characteristics of converging diverging nozzle, supersonic diffusers and pitot tube.
• Governing equations for oblique shock waves and Prandtl-Meyer flow, Shock Polar, variation of properties across an oblique shock wave, expansion of supersonic flow over successive corners and convex surfaces.
• Fannoline, friction parameter for a constant area duct, limiting conditions, isothermal flow in long ducts.
• Flow in ducts with heating or cooling, thermal choking due to heating, correlation with shocks.
• Propulsion applications including rocket nozzles, rocket engine staging, supersonic inlets, and exhaust nozzles for air breathing propulsion systems. Parametric cycle analysis for ramjet, turbojet, turbofan, and turboprop engines.
• Experimental work on following will be performed in the lab: Use of wind tunnel; determination of Mach Number, drag coefficients of various objects; comparison of aerodynamic designs; pressure distributions on models.

RECOMMENDED BOOKS

(01) Gas Dynamics by M.H. Aksel, O.C. Eralp

(02) Fundamentals of Gas Dynamics by R.D. Zucker & O. Biblarz