Comparison of heat transfer characteristics of a slot jet reattachment nozzle and a conventional slot jet nozzle

Book · Tue Dec 31 04:00:00 EST 1996

OSTI ID:445530

Narayanan, V; Seyed-Yagoobi, J; Page, R H ^[1]

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1. Texas A and M Univ., College Station, TX (United States)

A new type of nozzle, the Slot Jet Reattachment Nozzle (SJR), was designed and built with a zero degree exit angle. The heat transfer characteristics of the submerged SJR nozzle were compared to a conventional submerged slot jet nozzle. The comparisons were made under identical air flow power at each nozzle`s favorable height from the impinging surface. Infrared imaging techniques were used to obtain the temperature distributions on the impinging surface. The results indicate that comparable local heat transfer coefficients are obtained by the SJR nozzle while the exerted force on the impinging surface is significantly reduced. The peak local heat transfer coefficient for the SJR nozzle is approximately 8.4% higher than the peak local heat transfer coefficient for the slot jet nozzle under the same flow power. Additional experiments were conducted under matching local peak pressure for the SJR and slot jet nozzles. The results showed significant enhancements, of the order of 1.5 times, in the peak local heat transfer coefficient for the SJR nozzle over the slot jet nozzle.

• OSTI ID: 445530
• Report Number(s): CONF-961105--; ISBN 0-7918-1520-X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
EXPERIMENTAL DATA
FLUID FLOW
HEAT TRANSFER
JETS
NOZZLES
PERFORMANCE
TEMPERATURE DISTRIBUTION