Engineering reference for Indian students

Core aeronautical

Propulsion

5 self-contained study topics — notes, diagrams, formulas, and worked examples for exams and GATE.

Topics

Thermodynamics of Propulsion
Propulsion thermodynamics separates thermal and propulsive efficiencies to evaluate how effectively fuel power becomes useful thrust power.
$Overall efficiency \eta_{o} = \eta_{th} \times \eta_{prop}$
Turbojet and Turbofan Engines
Turbojet and turbofan performance is governed by momentum thrust, pressure ratio, and bypass architecture.
Ramjet and Scramjet
Ramjet and scramjet engines rely on vehicle speed for inlet compression, enabling high-speed propulsion without rotating compressors.
$Ramjet needs external compression - no static thrust at V_{0} = 0$
Rocket Propulsion
Rocket propulsion derives thrust from onboard propellant momentum and works independent of atmospheric oxygen.
Combustion in Aerospace Engines
Aerospace combustors must deliver stable high-efficiency heat release with low pressure loss and acceptable emissions.