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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Kim, S. -M Youn, J. Kim |
| Copyright Year | 2003 |
| Abstract | Dispersion of coolant jets in a film cooling flow field is the result of a highly complex interaction between the film cooling jets and the mainstream. In order to investigate the effects of injection hole shapes and injection angle on the film cooling of turbine blade, four models having cylindrical and laterally-diffused holes were used. Three-dimensional Navier-Stokes code with k – ε model was used to compute the film cooling coefficient on the turbine blade. A multi-block grid system was generated that was nearly orthogonal to the various surfaces. Mainstream Reynolds number based on the cylinder diameter was 7.1 × 104. The turbulence intensity kept at 5.0% for all inlets. The effect of coolant flow rates was studied for blowing ratios of 0.9, 1.3 and 1.6, respectively. The temperature distribution of the cylindrical body surface is visualized by infrared thermography (IRT) and compared with computational results. Results show that the effects of injection hole shape and injection angle increase as the blowing ratio increases. As lateral injection angle increases, the adiabatic film cooling effectiveness is more broadly distributed and the area protected by coolant increases. The mass flow rate of the coolant through the first-row holes is less than that through the second-row holes due to the pressure distribution around the cylinder surface. |
| Sponsorship | International Gas Turbine Institute |
| Starting Page | 541 |
| Ending Page | 549 |
| Page Count | 9 |
| File Format | |
| ISBN | 0791836886 |
| DOI | 10.1115/GT2003-38645 |
| e-ISBN | 0791836711 |
| Volume Number | Volume 5: Turbo Expo 2003, Parts A and B |
| Conference Proceedings | ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference |
| Language | English |
| Publisher Date | 2003-06-16 |
| Publisher Place | Atlanta, Georgia, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Temperature distribution Turbulence Turbine blades Reynolds number Coolants Jets Film cooling Shapes Flow (dynamics) Pressure Cylinders Thermography |
| Content Type | Text |
| Resource Type | Article |
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