This paper explores the subcooled nucleate boiling and critical heat flux (CHF) characteristics of a hybrid cooling module that combines the cooling attributes of micro-channel flow and jet impingement. A test module was constructed and tested using HFE-7100 as working fluid. Increasing the coolant’s flow rate and/or subcooling shifted both the onset of boiling (ONB) and CHF to higher heat flux...

In order to cool the gas turbine vane or blade and raise operating temperature, two standard convective cooling methods are used: jet impingement film cooling. The current study uses computational analysis analyze compare effectiveness with without multi-jet on a flat plate. Ansys Fluent software is used perform results were compared experimental result using K-ω SST turbulence model validated ...

Experimental and numerical methods were used to explore the cooling performance of a new hybrid device consisting of a slot jet impinging into a micro-channel, thus capitalizing upon the merits of both cooling configurations. The three-dimensional heat transfer characteristics of this device were analyzed using the standard k–e turbulent model. Numerical predictions for liquid PF-5052 show exce...

The strength of panel sheets can be increased by 2–3 times after hot stamping, and for high quality stamped sheets, uniform cooling rate on the die face to quench is needed. However, it difficult water channels, commonly used stamping dies, dissipate heat evenly. In addition, dies are easily corroded contact with at temperature. Thus, this study considers air quenching process. airflow applied ...

This paper presents recent advances in a number of novel, high-performance cooling techniques for emerging electronics applications. Critical enabling thermal management technologies covered include microchannel transport and micropumps, jet impingement, miniature flat heat pipes, transient phase change energy storage systems, piezoelectric fans, and prediction of interface contact conductance....

This study examines the single-phase and two-phase cooling performance of a hybrid micro-channel/micro-jet impingement cooling scheme using HFE 7100 as working fluid. This scheme consists of supplying coolant from a series of jets that deposit liquid into the micro-channels. A single-phase numerical scheme that utilizes the k–e turbulent model and a method for determining the extent of the lami...

This study explores the single-phase cooling performance of a hybrid cooling module in which a series of micro-jets deposit coolant into each channel of a micro-channel heat sink. This creates symmetrical flow in each micro-channel, and the coolant is expelled through both ends of the micro-channel. Three micro-jet patterns are examined, decreasing-jet-size (relative to center of channel), equa...

Cooling of gas turbine hot section components such as combustor liners, combustor transition pieces, turbine vanes (nozzles) and blades (buckets) is a critical task for improving the life and reliability of hotsection components. Conventional cooling techniques using air-film cooling, impingement jet cooling, and turbulators have significantly contributed to cooling enhancements in the past. Ho...