Introduction to Propulsion


  Propulsion.ppt (Size: 805 KB / Downloads: 11)

Definitions and Basic Relations

Fluid dynamics of compressible flows is generally referred to as Gas dynamics. This deals with an unified analysis of dynamics and thermodynamics of compressible flows.
Convectional fluid mechanics analyses are inadequate for high speed flows of gases and vapours due to non-compressibility approach.
Therefore in the application like high speed aerodynamics, rocket and missile propulsion, steam and gas turbines, and high speed turbocompressors compressible fluid dynamics is used to obtain solutions of a number of design problems.
The properties of fluid which are generally considered in compressible flow problems are temperature, pressure, density, internal energy, enthalpy, entropy and viscosity.
A major portion covered by the fluid dynamics of compressible flows deals with the relation between force, mass and velocity.

Rocket Propulsion

Goal:  Create a Force to Propel a Vehicle
Two options:
1) Take mass stored in a vehicle and throw it backwards (rocket propulsion). Use the reaction force to propel the vehicle.
Propellant ---> burn ---> expand through nozzle
(chem. energy)  (thermal energy)  (kinetic energy & momentum)