UNIVERSITY OF WEST BOHEMIA FACULTY OF MECHANICAL ENGINEERING
UNIVERSITY OF WEST BOHEMIA FACULTY OF MECHANICAL ENGINEERING DEPARTMENT OF POWER SYSTEM ENGINEERING Ratkovská Katarína
JET ENGINES
HISTORY • 17. 12. 1903 Orvill Wright and Wilburom Wright - first controlled flight
• 1935 Frank Whitley - patented principle of jet engines • 27. 8. 1939 Hans von Ohain - He. S – 3 B jet engine W-1
He - 178
TYPICAL ENGINE CUTS 0 – 1 engine intake 1 – 2 compressor 2 – 3 main combustion chamber 3 – 4 gas turbine 4 – 5 exhaust system
VK 1 engine with radial compressor
RD 33
Mi. G-29
BASIC PARAMETERS •
Turboprop engine TP 100
TS - 21 - Turboshaft engine with free gas turbine. - It is starter of R-27 F 2 M-300 engines.
Mig 23 - FLOGGER
COMPRESSOR TYPES Centrifugal flow compressors
AXIAL FLOW COMPRESSORS
THERMAL CYCLE • Jet engines are reactive engines witch works with atmospheric air. Purpose of air in this case is: - Basic component of working media in thermodynamic cycle - Oxygen included in air is used during chemical reaction of burning - Accelerated air (in case of engines with direct reaction) create trust
Sf. JE - Ideal thermal cycle
Sf. JE with afterburner – ideal thermal cycle
WORK OF IDEAL THERMAL CYCLE
WORK OF IDEAL THERMAL CYCLE • In p-V diagram • In T-s diagram
Ideal expansion work of gas:
EFFICIENCY OF IDEAL CYCLE - Sf. TJE •
WORK OF IDEAL THERMAL CYCLE Sf. TJE
CONCLUSION •
DISCUSSION QUESTIONS
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