Table of contentsUnsteady Turbine Aerodynamics - from the Laboratory to the Engine
The Jet Engine
Some facts:
Low Pressure Turbine Blades
Secondary Flows
Motivation
Efficiency Breakdown of the turbine
The Boundary Layer
Description of Suction Surface flow
Aerodynamic Load
Effect of Diffusion/Lift on Bubble
Wind Tunnel and Cascade
Higher Lift with Steady Flow– the cost
Unsteady Inflow: Wakes
Wake Distortion
Cascade Simulation
Simulation
Turbulent spots formed by wakes
Looking down…
Real turbulent spots
Details of turbulent spots
PowerPoint Presentation
Increased Lift Profiles
Benefits of wakes
Can we do better?
Aft Loaded Profiles
Slide 27
Profile Efficiencies
Cascade Results
Laboratory Aft Loading Works
Comparison: Laboratory and Engine
Rotors and Stators
Engine: Multistage Interactions
Results from 715 Engine (NGV3)
Things get more complicated in the Engine!
Beating: Proof of Multistage interactions
Effect of Wake Frequency
Slide 38
The Engine: Turbine Efficiency
Conclusions
Slide 41
For your information…
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