Improving adiabatic film-cooling effectiveness spanwise and lateral directions by combining BDSR and anti-vortex designs
Mustapha Grine1, Khadidja Boualem2, Ahmed Zineddine Dellil1, Abbes Azzi2
1University Oran 2 Mohamed Ben Ahmed, Oran, Algeria
2University of Science and Technology Mohamed Boudiaf, Oran, Algeria
Keywords: film cooling, Barchan dune, sister, CRV, anti-CRV
Abstract
In the present study, a numerical investigation was conducted to enhance the film cooling efficiency by using anti-vortex designs. Four configurations are considered in this paper, which are the configuration with the streamwise cylindrical injection, the case with an upstream Barchan dune shape ramp (BDSR), the case with sister holes and the configuration that combine the Barchan dune shape with sister holes. The effects of a blowing ration (M = 0.5, 0.85, 1.0 and 1.5) on the film cooling effectiveness are considered. The validation shows good agreement and almost all flow structures are well reproduced by the RANS computation. Results show that the Barchan dune shapes with sister holes have an influence on thermal and flow structures, this configuration substantially augments the film cooling efficiency.
|
