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Prof. V. Babu
IIT Madras

 

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  • Gas dynamics
    • Introduction
    • Fundamental Ideas
    • Normal shocks
    • Rayleigh flow
    • Fanno flow
    • Quasi 1D flows
    • Oblique shocks
    • Prandtl-Meyer waves
  • Propulsion
    • Thrust
    •  Modes of Propulsion
    •  Operation of a Basic Gas Turbine Engine
    •  Turbojet, Afterburning Turbojet and Turbofan Engine
    •  Detailed Analysis of the parts of a Gas Turbine Engine
      •   Intake – Subsonic
      •   Compressor Aerodynamics
      •   Combustor
        •   Emissions
      •  Turbine Aerodynamics
        •   Cooling, Materials & Metallurgy
      •   Nozzles
    •  Turbofan Engine
    •  Emerging Trends
    •  Ramjet & Turboramjet Engine
      •  Supersonic Intakes
    •   Scramjet Engine
    •   Thrust Equation
    •   Thermodynamic Analysis
    •   Thrust Calculations Turbojet, Turbofan, Ramjet Engine
 


Lecture

Topics and contents

1

Introduction - Compressibility of Fluids; Compressible and Incompressible Flows; Perfect Gas Equation of State; Calorically Perfect Gas

2

One Dimensional Flows – Basics Governing Equations; Acoustic Wave Propagation Speed; Mach Number; Reference States – sonic state

3

One Dimensional Flows – Basics (cont’d) Reference States – stagnation state; T-s and P-v Diagrams in Compressible Flows

4

Normal Shock Waves - Governing Equations; Mathematical Derivation of the Normal Shock Solution

5

Normal Shock Waves - (cont’d) Illustration of the Normal Shock Solution on T-s and P-v diagrams; Worked example

6

Normal shock waves - (cont’d) Further Insights into the Normal Shock Wave Solution

7

Flow with Heat Addition - Rayleigh Flow Governing Equations; Illustration on T-s and P-v diagrams

8

Flow with Heat Addition - Rayleigh Flow (cont’d) Thermal Choking and Its Consequences

9

Flow with Heat Addition - Rayleigh Flow (cont’d) Worked example

10

Flow with Friction - Fanno Flow Governing Equations; Illustration on T-s diagram

11

Flow with Friction - Fanno Flow (cont’d) Friction Choking and Its Consequences; Worked example

12

Quasi One Dimensional Flows - Governing Equations; Impulse Function and Thrust; Area Velocity Relation

13

Quasi One Dimensional Flows - (cont’d) Geometric Choking; Area Mach number Relation for Choked Flow; Mass Flow Rate for Choked Flow

14

Quasi One Dimensional Flows - (cont’d) Flow Through A Convergent Nozzle; Flow Through A Convergent Divergent Nozzle

15

Quasi One Dimensional Flows - (cont’d) Worked example; Supersonic Wind Tunnels and Intakes; Worked example

16

Quasi One Dimensional Flows - (cont’d) Interaction between Nozzle Flow and Fanno, Rayleigh Flows; Worked examples

17

Oblique Shock Waves Introduction; Governing Equations; q-b-M curve

18

Oblique Shock Waves - (cont’d) Worked examples; Detached Shocks

19

Oblique Shock Waves - (cont’d) Reflected Shocks - Reflection from a Wall

20

Prandtl Meyer Flow - Propagation of SoundWaves and the Mach Wave; Prandtl Meyer Flow Around Concave and Convex Corners

21

Prandtl Meyer Flow- Prandtl Meyer Solution; Reflection of Oblique Shock From a Constant Pressure Boundary ; Worked example

22

Basic ideas in aircraft propulsion Thrust; Modes of Propulsion

23

Turbojet engine Operation of a turbojet and afterburning turbojet engine

24

Turbojet engine - (cont’d) Component analysis – intake and compressor

25

Turbojet engine - (cont’d) Component analysis – combustor, turbine and nozzle

26

Turbofan engine

27

Turbofan engine - (cont’d) Component analysis – Fan

28

Turbofan engine Emerging trends

29

Ramjet and turboramjet engines Operation of a Ramjet Engine and a Turboramjet Engine

30

Ramjet and turboramjet engines Component analysis – Supersonic Intake

31

Ramjet and turboramjet engines Component analysis – Supersonic Intake

32

Scramjet engines

33

Thermodynamics of jet engines Thrust Equation for a Turbojet and Turbofan Engine; T-s diagram of a Turbojet Engine

34

Thermodynamics of jet engines Component efficiencies; T-s diagram of a Turbofan Engine

35

Thrust calculations Turbojet and Turbofan engine

36

Thrust calculations (cont’d) Turbojet and Turbofan engine (cont’d)

37

Thrust calculations (cont’d) Afterburning Turbojet and Ramjet Engine

38

Thrust calculations (cont’d)  Worked example

39

Thrust calculations (cont’d) Worked example

40

Thrust calculations (cont’d)  Worked example
 
  • Freshman level Thermodynamics

  1. Fundamentals of Gas Dynamics by V. Babu, ANE Student Edition, 2008.
  2. Fundamentals of Propulsion by V. Babu ANE Student Edition, 2009.

  1. http://www.grc.nasa.gov/WWW/K-12/airplane/
  2. http://www.rolls-royce.com/

  1. Mechanics and Thermodynamics of Propulsion by P. G. Hill and C. R. Peterson, Third Edition, Addison Wesley, 1991.
  2. Elements of Gas Turbine Propulsion by J. D. Mattingly, McGraw-Hill Series in Aeronautical and Aerospace Engineering, 1996.
  3. Aerothermodynamics of Gas Turbine and Rocket Propulsion by G. C. Oates, Third edition, AIAA Education Series, 1997.
  4. Aerothermodynamics of Aircraft Engine Components by G. C. Oates, AIAA Education Series, 1985.
  5. Gas Turbine Theory by H. I. H. Saravanamuttoo, G. F. C. Rogers and H. Cohen, Fifth edition, Pearson Education, 2004.


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