Cooling of gas turbine hot-section components, such as combustor liners, combustor transition pieces, and turbine vanes (nozzles) and blades (buckets), is a critical task for improving the life and reliability of them. Conventional cooling techniques using air-film cooling, impingement jet cooling, and turbulators have significantly contributed to cooling enhancements in the past. However, the increased net benefits that can be continuously harnessed by using these conventional cooling techniques seem to be incremental and are about to approach their limit. Therefore, new cooling techniques are essential for surpassing these current limits. This paper investigates the potential of film-cooling enhancement by injecting mist into the coolant. The computational results show that a small amount of injection (2% of the coolant flow rate) can enhance the adiabatic cooling effectiveness about 30–50%. The cooling enhancement takes place more strongly in the downstream region, where the single-phase film cooling becomes less powerful. Three different holes are used in this study including a two-dimensional (2D) slot, a round hole, and a fan-shaped diffusion hole. A comprehensive study is performed on the effect of flue gas temperature, blowing angle, blowing ratio, mist injection rate, and droplet size on the cooling effectiveness with 2D cases. Analysis on droplet history (trajectory and size) is undertaken to interpret the mechanism of droplet dynamics.
Skip Nav Destination
e-mail: xli8@uno.edu
Article navigation
Research Papers
Simulation of Film Cooling Enhancement With Mist Injection
Xianchang Li,
Xianchang Li
Energy Conversion & Conservation Center,
e-mail: xli8@uno.edu
University of New Orleans
, 2000 Lakeshore Dr., New Orleans, LA 70148-2220
Search for other works by this author on:
Ting Wang
Ting Wang
Energy Conversion & Conservation Center,
University of New Orleans
, 2000 Lakeshore Dr., New Orleans, LA 70148-2220
Search for other works by this author on:
Xianchang Li
Energy Conversion & Conservation Center,
University of New Orleans
, 2000 Lakeshore Dr., New Orleans, LA 70148-2220e-mail: xli8@uno.edu
Ting Wang
Energy Conversion & Conservation Center,
University of New Orleans
, 2000 Lakeshore Dr., New Orleans, LA 70148-2220J. Heat Transfer. Jun 2006, 128(6): 509-519 (11 pages)
Published Online: December 9, 2005
Article history
Received:
April 5, 2005
Revised:
December 9, 2005
Citation
Li, X., and Wang, T. (December 9, 2005). "Simulation of Film Cooling Enhancement With Mist Injection." ASME. J. Heat Transfer. June 2006; 128(6): 509–519. https://doi.org/10.1115/1.2171695
Download citation file:
Get Email Alerts
Cited By
Estimation of thermal emission from mixture of CO2 and H2O gases and fly-ash particles
J. Heat Mass Transfer
Non-Classical Heat Transfer and Recent Progress
J. Heat Mass Transfer
Related Articles
Film Cooling Measurements for Novel Hole Configurations
J. Heat Transfer (August,2006)
Effects of Various Modeling Schemes on Mist Film Cooling Simulation
J. Heat Transfer (April,2007)
Comparison of Film Effectiveness and Cooling Uniformity of Conical and Cylindrical-Shaped Film Hole With Coolant-Exit Temperature Correction
J. Thermal Sci. Eng. Appl (September,2011)
Compound Triple Jets Film Cooling Improvements via Velocity and Density Ratios: Large Eddy Simulation
J. Fluids Eng (March,2011)
Related Proceedings Papers
Related Chapters
Further Applications of Spreading Resistance
Thermal Spreading and Contact Resistance: Fundamentals and Applications
Numerical Simulation of Nucleate Spray Cooling: Effect of Droplet Impact on Bubble Growth and Heat Transfer in a Thin Liquid Film
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Numerical Study on Dynamic Discharging Performance of Packed Bed Using Spherical Capsules Containing N-Tetradecane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)