Related Experiment Videos
Mach number effect on jet impingement heat transfer
P Brevet1, E Dorignac, J J Vullierme
1Laboratoire d'Etudes Thermiques (UMR CNRS 6608) ENSMA, Teleport 2, BP 40109, 86961 FUTUROSCOPE, France.
Annals of the New York Academy of Sciences
|July 20, 2001
Summary
This study investigates heat transfer from a single round free jet impinging on a flat plate. It found that varying the injection Mach number (M) while keeping the Reynolds number (Re) constant allows direct evaluation of Mach number
Area of Science:
- Heat Transfer
- Fluid Dynamics
- Aerodynamics
Background:
- Understanding heat transfer is crucial for designing efficient cooling systems.
- Jet impingement is a widely used cooling technique in various industries.
Purpose of the Study:
- To experimentally investigate heat transfer from a single round free jet impinging normally on a flat plate.
- To evaluate the influence of the injection Mach number (M) on jet impingement heat transfer.
- To develop a correlation for the average Nusselt number.
Main Methods:
- Infrared measurements were used to characterize local and averaged heat transfer coefficients and Nusselt numbers.
- Experiments were conducted with varying nozzle diameters (3-15 mm) to alter the Mach number (M) while maintaining a constant Reynolds number (Re).
- Adiabatic wall temperature was used as the reference temperature for heat transfer coefficient calculations.
Main Results:
- Local and averaged heat transfer coefficients and Nusselt numbers were determined.
- The influence of Mach number on jet impingement heat transfer was directly evaluated.
- A correlation for the average Nusselt number was obtained from the experimental data.
Conclusions:
- The study provides valuable data for optimizing jet impingement cooling.
- The developed correlation can be used to predict heat transfer performance.
- Mach number is a significant parameter influencing jet impingement heat transfer.