Recent advances in film cooling enhancement: A review

Numerical assessment of round-to-slot film cooling performances on a turbine blade under engine representative conditions

Multi-objective optimization of round-to-slot film cooling holes on a flat surface

Vapor-based processes are particularly promising to deposit the perovskite thin film absorber of solar cells. These deposition methods are up-scalable, involve a controlled solvent-free environment, have the ability to conformally coat rough substrates, involve soft, low-energy deposition conditions, are compatible with shadow masks for patterning, and are already widely deployed at the industrial level. Still, solar cells featuring layers processed with these methods have not yet reached the same performance as their solution-processed counterparts, in part, due the complexity of controlling the sublimation of the organic precursors. This Research Update will discuss the different vapor-based deposition processes that have been reported to deposit perovskite thin films and will discuss reaction chamber designs that provide an enhanced control over the deposition process. The second part of this Research Update will then link experimental observations regarding layer properties depending on process conditions to theoretical concepts describing the sublimation and condensation of precursors and the growth of the perovskite thin film.

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Vapor deposition of metal halide perovskite thin films: Process control strategies to shape layer properties

Experimental and numerical investigations on double-jet film-cooling with different mainstream incidence angles

Film cooling with primary and secondary hole injection is numerically investigated. Effects of primary hole shape and secondary hole injection angle are documented. Each primary hole, either cylind...

Influence of secondary hole injection angle on enhancement of film cooling effectiveness with horn-shaped or cylindrical primary holes

Investigation and numerical simulation on film cooling performance with an anti-vortex hole design: Influences of diameter ratio

Optimization of cooling structures in gas turbines: A review

\n Film cooling is one of the most efficient and widely used cooling methods for high-temperature components. The interaction between the film cooling jet and main flow creates the counter-rotating vortex pair (CRVP), which enhances the mixing between coolant and hot stream and lifts the coolant film off the protected surface. The desire to overcome the unfavorable effects of CRVP and thus efficiently improve cooling effectiveness promotes various new combined-hole designs for film cooling. In this review paper, a summary of previous progress on film cooling and a special focus on recent literature related to the combined-hole film cooling designs with less difficulty in machining are provided. The underlying mechanisms of the enhancement in cooling effectiveness and film coverage due to antikidney vortex structure by combined holes are analyzed. Some perspectives on future prospects are finally addressed.

Combined-Hole Film Cooling Designs Based on the Construction of Antikidney Vortex Structure: A Review

In this study, four novel film cooling hole designs, all based on cylindrical holes, are numerically evaluated, and compared with those of a simple cylindrical hole and a laterally-diffused shaped ...

Rui Zhu

Papers

Influence of secondary hole injection angle on enhancement of film cooling effectiveness with horn-shaped or cylindrical primary holes

Investigation and numerical simulation on film cooling performance with an anti-vortex hole design: Influences of diameter ratio

Optimization of cooling structures in gas turbines: A review

Combined-Hole Film Cooling Designs Based on the Construction of Antikidney Vortex Structure: A Review

Influence on film cooling effectiveness of novel holes based on cylindrical configurations