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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-431-1

ISBN Online: 978-1-56700-430-4

First Thermal and Fluids Engineering Summer Conference
August, 9-12, 2015 , New York City, USA

EXPERIMENTAL INVESTIGATION OF CARBON DIOXIDE DRY-ICE ASSISTED JET IMPINGEMENT COOLING PERFORMANCE

Get access (open in a dialog) pages 977-980
DOI: 10.1615/TFESC1.fnd.012987

Аннотация

The novel concept of dry-ice assisted jet impingement cooling is suggested by current study. When the carbon-dioxide (CO2) passes through the tiny orifice gap or jet nozzle, it experiences the rapid temperature drop as well as pressure decrease by the Joule-Thomson effect. This temperature drop causes the formation of small CO2 dry-ice particles. Besides the enhanced cooling performance by lowered bulk-jet temperature, the improved heat transfer can be expected by the additional sublimation effect between the dry-ice particles and cooling target surface. The cooling performance comparison was performed experimentally between the suggested CO2 solid-gas two-phase jet and the single phase nitrogen (N2) jet. Both jet fluids are impinged on the electrically heated flat heater surface and their heat transfer coefficients are measured. The performance of impinging jet for both fluids are also evaluated by the variance of flow parameter like Reynolds number and jet geometry configurations.