original power point presentation made with help of Abhijit Banerjee under the guidance of prof. Abhimanyu Kar

2. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY
2
SCRAMJET SUPERSONIC COMBUSTION RAMJET
SUPERSONIC THOUGHOUT THE ENTIRE ENGINE
OPERATE EFFICIENTLY AT EXTREMELY HIGH SPEED

3. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 3
Wernher Magnus
Maximilian Freiherr von
Braun (1912-1977)

4. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 4
THE BIRTH OF JET ENGINES AND THE
PRIMARY RESEARCH AT PEEN MUNDE
EXTENSIVE RESEARCH BEING DONE ON JET
ENGINES BY THE USA IN THE POST WORLD
WAR II PERIOD
THE RECENT STANDING EXAMPLE OF THE
APPLICATION OF SCRAMJET ENGINE (NASA
X-43 A)

5. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 5
JETDEFININGQUANTITIES
CROSS-SECTIONAL
AREA
COMPOSITION
VELOCITY
VELOCITY

6. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 6
SYSTEM JET VELOCITY (m/s)
TURBOFAN 200-600
TURBOJET(SEA-LEVEL,STATIC) 350-600
TURBOJET(MACH 2 , 36000 ft.) 900-1200
RAMJET(MACH 2, 36000 ft.) 900-1200
RAMJET(MACH 4, 36000 ft.) 1800-2400
SOLID ROCKET 1500-2600
LIQUID ROCKET 2000-3500
MANNED SCRAMJET 980-1100
UNMANNED SCRAMJET 3200-3300

7. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 7

8. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 8

9. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 9
VEHICLE VELOCITY
COMBUSTION
OPERATINGCOMPONENTS
INTAKE(DIFFUSER)
BURNER(COMBUSTION
CHAMBER)
NOZZLE
•Air decelerated in intake (diffuser) and pressure rises due to ram effect.
• Known as ram pressure and significant at supersonic speeds.
• A ramjet therefore needs neither a compressor nor a turbine, simplifying the design and reducing
the cost.

10. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 10
CONVERGING
INLET
•COMPRESS THE
INCOMING AIR
COMBUSTOR
•GASEOUS FUEL IS
BURNED WITH
ATMOSPHERIC
OXYGEN
DIVERGING
NOZZLE
•THE HEATED AIR IS
ACCELARATED TO
PRODUCE THRUST
COMPOSITION
OF SCRAMJET

11. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 11
BREATHER ENGINE
NO FANS REQUIRED
RELY ON SHOCKWAVES

12. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 12

13. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 13
 Doesn't have to carry oxygen.

14. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 14
In the above picture:-
a) Jet propulsion engine
b) Ramjet engine
c) Scramjet engine
• Large temp rise associated with deceleration
from high speed to M~0.3 for combustion
• Solution for increased flight speed: decelerate
to ‘lower’ supersonic speeds in combustor
• Combustion very difficult (flame support) in a
high speed flow
• Vehicle cooling requirements become very
challenging

15. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 15

16. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 16

17. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 17
Introduction to Flight, John D Anderson Jr.(
The Mc Graw-Hill companies (5th Edition)).
https://en.wikipedia.org/wiki/Scramjet
http://spaceflight101.com/india-tests-
hypersonic-scramjet-for-future-application-in-
rocketry/
http://www.csmonitor.com/Science/2010/061
7/US-Air-Force-scramjet-test-sees-Spaceships-
in-future

18. DEBADRI GHOSH AND ABHIJIT BANERJEE
DEPT OF MECHANICAL ENGINEERING , ACDEMY OF TECHNOLOGY 18