about scramjets, its components, function, its advantages and advantages, its applications with many references by reshmi.r , dinesh kumar and sandeep.

1. Presented by:
R.DINESH KUMAR
R.SANDEEP
R.RESHMI
B.E MATERIALS
SCIENCE AND
ENGINEERING.,(3RD
SEM)

2. WHAT IS A SCRAMJET
ENGINE?
 Scramjet stands for supersonic combustion
ramjet.
 Combustion takes place in supersonic airflow .
 Air breathing jet engine.
 Has no turbo machinery.
 Integrated engine vehicle designed for aircraft
and missile.

3. COMPONENTS OF SCRAMJET
ENGINES
The scramjet is composed of three basic
components:
1. The converging Inlet : incoming air is
compressed and decelerated.
2. A Combustor : gaseous fuel is burned with
atmospheric oxygen to produce thrust.
3. A diverging Nozzle : heated air is accelerated
to produce thrust.

5. PRINCIPLE OF WORKING:
INLET
 The air approaches at supersonic speed
into the inlet .
 The air is heated due to compression.
 The hot air is then let into the combustion
chamber.

6. COMBUSTION CHAMBER
 Fuel is sprayed on the hot air in the
combustion chamber.
 Dissociation of fuel takes place which
increases the temperature of the air.
 The whole combustion process takes
place at supersonic speeds.
 The ignited fuel along with the air is sent
into the nozzle for exhaustion.

7. NOZZLE
 The gases are gushed out through the
nozzle.
 The release of the gases produces
forward thrust.
 The thrust produced exceeds the drag
, which is the cause for forward
motion.

8. FUELS
 Hydrogen is the most commonly used
fuel.
 Steam is produced as a by product
which is eco friendly.
 Use of hydrogen eliminates the need
for igniters.

9. Advantages of scramjet
 Does not have to carry oxygen.
 No rotating parts, making it easier to
manufacture.
 Less weight and simple design.

10. Disadvantages of scramjet
 As scramjet cannot produce efficient
thrust until mach 5,it requires additional
propulsion systems.
 High cost
 Cooling is required.
 Testing difficulties.

12. References:
BOOKS:
 Aircraft propulsion – Saeed Farokhi.
 Aerospace propulsion systems – Thomas A. Ward
 Aircraft propulsion – V. Babu
 The scramjet engine(processes and characteristics) – corin segal
JOURNALS:
 Kristen Nicole Robert ,”Analysis and design of hypersonic scramjet
engine with a starting mach number of four” , Kristen Nicole Robert
, August 2008
 Epstein ,M &Kutshenreuter, P 1994,”Fuel injection system for
scramjet engine”, United States Patent, patent number 5280705.
 G.M Sayeed Ahmed ,“Design and analysis of scramjet inlet”,
International Journal of Scientific and Research Publications,
Volume 3, Issue 1, January 2013.