Recent Studies in Turbine Blade Cooling
Gas turbines are used extensively for aircraft propulsion, land-based power generation, and industrial applications. Developments in turbine cooling technology play a critical role in increasing the thermal efficiency and power output of advanced gas turbines. Gas turbine blades are cooled internall...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2004-01-01
|
| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/S1023621X04000442 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Gas turbines are used extensively for aircraft propulsion,
land-based power generation, and industrial applications.
Developments in turbine cooling technology play a critical
role in increasing the thermal efficiency and power output of
advanced gas turbines. Gas turbine blades are cooled internally
by passing the coolant through several rib-enhanced
serpentine passages to remove heat conducted from the outside
surface. External cooling of turbine blades by film cooling
is achieved by injecting relatively cooler air from the
internal coolant passages out of the blade surface in order
to form a protective layer between the blade surface and
hot gas-path flow. For internal cooling, this presentation focuses
on the effect of rotation on rotor blade coolant passage
heat transfer with rib turbulators and impinging jets. The
computational flow and heat transfer results are also presented
and compared to experimental data using the RANS
method with various turbulence models such as k-ε, and
second-moment closure models. This presentation includes
unsteady high free-stream turbulence effects on film cooling
performance with a discussion of detailed heat transfer coef-
ficient and film-cooling effectiveness distributions for standard
and shaped film-hole geometry using the newly developed
transient liquid crystal image method. |
|---|---|
| ISSN: | 1023-621X |