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Главная IHTC DL Архив Оргкомитет Будущие конференции AIHTC
International Heat Transfer Conference 13

ISBN Печать: 1-56700-226-9 (CD)
ISBN Онлайн: 1-56700-225-0

HYBRID SYNTHETIC JET INTENDED FOR ENHANCED JET IMPINGEMENT HEAT/MASS TRANSFER

DOI: 10.1615/IHTC13.p16.140
page 12

Zdenek Travnicek
Institute of Thermomechanics of the Czech Academy of Sciences

Tomas Vit
Institute of Thermomechanics AS CR, and Faculty of Mechanical Engineering, Technical University of Liberec, Czech Republic

Аннотация

A possibility to enhance the “synthetic jet” has been studied. Instead of the typical zero-net-mass-flux synthetic jets, the non-zero-net-mass-flux hybrid synthetic jet was proposed. An additional volume rate is entrained (pumped) through a pair of auxiliary channels into the actuator cavity. Not any fluid supply is added from any external source (neither blower nor compressor are needed).
Three variants are experimentally studied, namely (a) the synthetic (zero-net-mass-flux) jet, (b) hybrid synthetic (non-zero-net-mass-flux) jet, and (c) continuous jet. Flow visualization, hotwire measurement, and mass transfer measurement using the naphthalene sublimation technique have been performed.
The present experiments confirmed that the hybrid synthetic jet achieves higher extrusion volume flow rate in comparison with the common synthetic jets. An appreciable enhancement of the impingement heat/mass transfer was achieved. The main reason for the heat/mass transfer enhancement is the speedup of the time-mean flow by means of higher extrusion volume flow rate.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION