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Propulsion engine performance

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Carmen Ruan

on 17 October 2014

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Transcript of Propulsion engine performance

Propulsion engine performance

index of the class
Gas Turbine
Symple Gas Turbine Cycle
Analysis of the Open Simple-Cycle Gas Turbine
OTTO CYCLE
EQUATIONS
EXERCISE

Statement
A four-cylinder four-stroke 50 kW gasoline engine,
running at 3000 rpm, has a compression ratio of 9,
500 cm3 of displacement per cylinder.
Evaluate:
a) The conversion efficiency, deducing it from the basic
cycle states.
b) Maximum pressure and temperature in the cycle,
and mean effective pressure.

BIBLIOGRAPHY
QUESTIONS??
Introducction
Gas turbine and stroke engine
Different configuration engine systems
Performance data
Graphical methods
An internal-combustion engine consisting essentially of an air compressor, combustion chamber, and turbine wheel that is turned by the expanding products of combustion.
Brayton cycle
turbojet
turboprop

turboshaft
(electric generator)
turbofan: high-bypass
(civilian)
turbofan: low-bypass afterburning (military)
TURBOJET
INTRODUCTION:Aircraft Performance
Force balance for aircraft in steady level flight



Continuity equation
Gs = G+c = G(1+f)
Equation of amount of motion
-G V1 + (G+c) Ve = Fext
DESIGN
Air intake
compressor
combustion chamber
turbine
noozle
TURBO-PROP
TURBOJET VS TURBO-PROP

The new turbine moves the propeller

the new nozzle provides a low Velocity in the exit and a high propulsion efficiency
CONCLUSION
MAIN ENGINE SYSTEMS
STROKE ENGINES
Reciprocating motion, used in reciprocating engines and other mechanisms, is back-and-forth motion. Each cycle of reciprocation consists of two opposite motions: there is a motion in one direction, and then a motion back in the opposite direction
TURBOFAN
Types
low bypass
high by pass
afterburning
TURBOJET VS TURBOFAN
two air flow
2 STROKE ENGINE
Applications
motorcycle
snowmobiles
ultralights
model airplanes
4 STROKE ENGINE
AN IDEAL SYMPLE GAS TURBINE PERFORMANCE
Analysis of the Ideal Cycle
isobaric processes
work ratio
(steady-flow energy equation)
Properties for Gas Turbine Analysis
EXERCISE
OTTO ENGINE PERFORMANCE
Golley, John (1997). Genesis of the Jet: Frank Whittle and the Invention of the Jet Engine. Crowood Press. ISBN 1-85310-860-X.
Hill, Philip; Peterson, Carl (1992), Mechanics and Thermodynamics of Propulsion (2nd ed.), New York: Addison-Wesley, ISBN 0-201-14659-2
Kerrebrock, Jack L. (1992). Aircraft Engines and Gas Turbines (2nd ed.). Cambridge, MA: The MIT Press. ISBN 978-0-262-11162-1.
Hardenberg, Horst O. (1999). The Middle Ages of the Internal combustion Engine. Society of Automotive Engineers (SAE). ISBN 978-0-7680-0391-8.
Cengel, Yunus A; Michael A Boles; Yaling He (2009). Thermodynamics An Engineering Approach. N.p. The McGraw Hill Companies. ISBN 978-7-121-08478-2.
ENF
THE END
cruise flight
G=quantity of mass of air
c= quantity of mass of combustible
f= dosage or mix ratio
V= velocity

Two stroke vs four stroke
SOLUTION
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