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| Numerical Simulation of Film Cooling of Shaped Holes |
| DOI：10.13949/j.cnki.nrjgc.2025.03.012 |
| Key Words:film cooling numerical simulation grid shaped hole blowing ratio |
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| Abstract:The self-developed cell-vertex unstructured computational fluid dynamics software AENS was used for the numerical simulation of film cooling. With regard to the influence of boundary layer grid and near-hole zone grid on the accuracy of film cooling simulation and the difference in cooling efficiency of films with shaped holes under different blowing ratios， a standard single-hole film cooling model was adopted， and a comparative study was carried out to investigate the difference in cooling efficiencies of different boundary layer grids， different near-hole zone grids， and three types of holes， namely， cylindrical holes， fan-shoped holes and dustpan holes under different blowing ratios. The results show that the height of the first layer of the grid does not have a great influence on the simulation results. The grid of the near-hole area has a greater influence on the simulation results under lower blowing ratios， and the mesh generated by nesting two O-type blocks in the near-hole area has a better simulation result. Under higher blowing ratios， the fan-shaped holes and laid-back fan-shaped holes have a more obvious increase in the film cooling efficiencies of the near-hole area， compared with the cylindrical holes. The GE-E3 high-pressure turbine with film guide vane model was simulated， which proved that the self-developed software has the ability to calculate engineering examples with complex film-cooling structures. The practicality and accuracy of the self-developed software was verified. |
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