Aerothermal Propulsion

1
Aerothermal Propulsion

• Lecture 34
• Intro to Turbo-Machinery

2
Agenda

• History of Jet Propulsion
• Stage Work
• Stage Efficiency

3
Propellers
Late Middle ages
4
Wind turbines
Note area is increased
5
Steam turbine
1900
6
First Jet plane
1909
7
First Jet plane
1937-Germany just before WWII
8
First Jet Fighter
1943
9
Second jet Fighter
1943
10
First US Jet Fighter
1944
11
The Rude shock
1950 Korea
12
The Reaction
1951 Korea
13
Turbojet Propulsion

• Basic Propulsion Engines
• Jet Turbines and Turbomachinery (low and slow)

14
Turbojet
15
Turbojet Sections
compression
Afterburning?
burning
expansion
1.
2.
3.
6.
7.
5.
4.
16
Turbojet Process Graphs
Combustion (afterburner) Pconstant
Combustion Pconstant
Isentropic expansions
Isentropic compression
17
Turbine Engines
18
Compression Stage
Rotor
2.
1.
3.
w2
?2
?1
?2
c2
U
w2
w1
?3
U
c3
U
c2
c1
19
Velocity Triangles
20
Work
21
Single Stage
22
Stage Efficiency