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Propulsion engine performance
Transcript of Propulsion engine performance
index of the class
Symple Gas Turbine Cycle
Analysis of the Open Simple-Cycle Gas Turbine
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.
a) The conversion efficiency, deducing it from the basic
b) Maximum pressure and temperature in the cycle,
and mean effective pressure.
Gas turbine and stroke engine
Different configuration engine systems
An internal-combustion engine consisting essentially of an air compressor, combustion chamber, and turbine wheel that is turned by the expanding products of combustion.
turbofan: low-bypass afterburning (military)
Force balance for aircraft in steady level flight
Gs = G+c = G(1+f)
Equation of amount of motion
-G V1 + (G+c) Ve = Fext
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
MAIN ENGINE SYSTEMS
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
high by pass
TURBOJET VS TURBOFAN
two air flow
2 STROKE ENGINE
4 STROKE ENGINE
AN IDEAL SYMPLE GAS TURBINE PERFORMANCE
Analysis of the Ideal Cycle
(steady-flow energy equation)
Properties for Gas Turbine Analysis
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.
G=quantity of mass of air
c= quantity of mass of combustible
f= dosage or mix ratio
Two stroke vs four stroke