Abstract
Massively parallel simulation based on hybrid thermal lattice Boltzmann method (HTLBM) is performed to analyze the near-wall flow and heat transfer characteristics in compound angled film cooling. Multiple graphic processing units (Multi-GPUs) are used to speed up the computations. The effect of compound angle on the instantaneous flow characteristics and cooling performance with various blowing ratios and inclined angles are studied in detail. In the simulation, three compound angles of β=15°,30°,45° are considered. The inclined angles of coolant jet to the flat surface are set to α=30° and α=60°, respectively. The blowing ratios are BR=0.5 and BR=1.0. It is observed that the application of compound angle enhances the mixing between the crossflow and the jet flow, especially for the large-blowing-ratio cases. The detachment of the coolant jet is reduced by applying compound angle, which results in the increasing of film cooling effectiveness, particularly in the case of small jet inclined angle α. Moreover, to reasonably evaluate the uniformity of coolant film in compound angled film cooling, a novel coefficient (COU) affording a wide application is proposed in the present work. The results show that the coolant-film uniformity is decreased by the application of compound angle.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
