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Thursday, May 21, 2020

CLASSIFICATION OF PROPULSIVE DEVICES


Propulsive devices are the device which is used especially used for air and space vehicles. Propulsive devices are broadly classified into two parts air-breathing and non-air-breathing. The rocket motor is a non-airbreathing propulsive device.

CLASSIFICATION OF PROPULSIVE DEVICES



propulsive devices

propulsive devices are broadly classified into two parts

  1.     Air-breathing

for example 
a)      Ramjet
b)      Scramjet
c)       Turbojet
d)      Turboprop
e)      Turbofan

      2.   Non- air-breathing

for example 
a)      Chemical
b)      Nuclear
c)       Electric

We are more concerned about non-air-breathing propulsive devise which are basically of 3 types 

         1.       Photons


         2.    Rockets

a.       Chemical
                                              i.            Solid
                                             ii.            Liquid
                                           iii.            Hybrid
b.      Non-chemical
                                            I.            Electric
                                          II.            Nuclear
                                        III.            Solar

           3.    Solar sail


propulsive devices DIFFERENCE BETWEEN AIRBREATHING AND NON-AIR BREATHING


AIR BREATHING


  •         Air breathing propulsive  devise take oxygen from atmosphere
  •        They operated only in the atmosphere, not in a vacuum
  •         These device can’t operate at the flight speed not more than M 5.
  •        The rate of climb decrease with altitude in the air breathing propulsive devices  
  •       The thrust developed by the air-breathing   engine is dependent on flight speed


NON AIR BREATHING


  •        Non-air breathing propulsive devices have its fuel and oxygen with its self
  •        They can operate both in atmosphere and vacuum(space)
  •        These devices can operate at any flight speed
  •        The rate of climb increases with altitude
  •        The thrust developed by non-air breathing devices are independent of flight speed


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