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Numerical investigation of turbulent flow and heat transfer for enhancing performance of gas turbine blade with rib turbulators |
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| รหัสดีโอไอ | |
| Creator | Theeradech Mookum |
| Title | Numerical investigation of turbulent flow and heat transfer for enhancing performance of gas turbine blade with rib turbulators |
| Contributor | Pilaisiri Chaisri |
| Publisher | Maejo University |
| Publication Year | 2567 |
| Journal Title | Maejo International Journal of Science and Technology |
| Journal Vol. | 18 |
| Journal No. | 1 |
| Page no. | 13 |
| Keyword | rib turbulators, turbulent flow and heat transfer, Reynolds-averaged Navier-Stokes equations, impingement cooling, cooling effectiveness |
| Website title | Maejo International Journal of Science and Technology |
| ISSN | 1905-7873 |
| Abstract | We numerically investigate the effects of rib turbulators on turbulent flow and heat transfer in a gas turbine blade with impingement cooling. The 45-angled ribs are attached on two opposite walls of the blade with two ribbed channels. Three-dimensional steady-state Reynolds-averaged Navier-Stokes equations combined with the standard k- model and heat equation are used to analyse the turbulent flow, temperature distribution and cooling effectiveness. The numerical results indicate that a blade with ribs generates more re-circulation regions and secondary flows, leading to higher turbulent kinetic energy, wall shear stress and a 23.86% increase in cooling effectiveness. In addition, increasing inlet velocity increases the volume-averaged cooling effectiveness, volume-averaged turbulent kinetic energy and area-averaged wall shear stress. |
