Numerical investigation of V-shaped trench on film cooling performance

This study seeks to improve the film cooling performance by embedding a film hole in a V-shaped trench. The angle scale that makes up the V has been changed, 25°, 75°, and 115°. The three novel designs were compared to rectangular (transverse) trench and conventional cylindrical hole. The main param...

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Bibliographic Details
Published in:Thermophysics and aeromechanics 2023-03, Vol.30 (2), p.305-315
Main Authors: Boualem, Kh, Bordjane, M., Bourdim, M., Grine, M., Ben Ali Kouchih, F., Azzi, A.
Format: Article
Language:English
Subjects:
Cooling
Effectiveness
Film cooling
Physics
Physics and Astronomy
Pressure loss
Thermodynamics
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Summary:This study seeks to improve the film cooling performance by embedding a film hole in a V-shaped trench. The angle scale that makes up the V has been changed, 25°, 75°, and 115°. The three novel designs were compared to rectangular (transverse) trench and conventional cylindrical hole. The main parameters of film cooling, cooling effectiveness, and total pressure loss, were discussed at three blowing ratios, M = 0.5, 1.0, and 2.0. Fifteen cases were simulated using Reynolds averaged Navier–Stokes equations closed by the RNG k – ε model. A good agreement is obtained between CFD results with experimental data of the baseline case. The results showed that the use of compact jet in the trenches, whether transverse or V-shaped, enhances the film cooling effectiveness. The use of V-shaped trench helps to reduce the size of the kidney vortices (CRV) and, thus, enhance the film cooling performance. The V2 shaped trench is the most prefer in improving the film cooling efficiency and reducing the total pressure loss.
ISSN:1531-8699
0869-8643
1531-8699
DOI:10.1134/S0869864323020117