Local heat transfer and pressure drop measurements in a wavy channel with and without flow disturbers

Conference · Fri Sep 01 04:00:00 EDT 1995

OSTI ID:98690

Dini, S; Kmelius, D ^[1]; Saniei, N ^[2]

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1. Western New England College, Springfield, MA (United States)
2. Southern Illinois Univ., Edwardsville, IL (United States)

Experiments have been performed to measure local heat transfer coefficients and pressure drop in a wavy channel for Reynolds numbers of 2,900 and 7,000. Additionally, the effect of flow disturbers mounted on the first two peaks on one surface was investigated. The transient method and liquid crystals were used for the local heat transfer measurements. Initial experimental results indicate that addition of ribs into the passage stimulates flow instabilities which enhance the heat transfer performance with moderate effect on pressure drop. Measurements were conducted on a 6 in x 3/8 in x 12 in wavy channel with a wave length of one inch. The highest local heat transfer was detected on the second, followed by the third and fourth peaks at Re = 7000; wheras for Re = 2900 the highest heat transfer was along the next peak detected immediately after the disturbers. The experimental results observed in this study suggest that ribbed passages would yield higher heat transfer with moderate change in pressure drop compared with non-ribbed channels.

• OSTI ID: 98690
• Report Number(s): CONF-950640--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BOILERS
DATA ACQUISITION SYSTEMS
FLUID FLOW
HEAT EXCHANGERS
HEAT TRANSFER
MEASURING METHODS
NUSSELT NUMBER
PRESSURE DROP
REYNOLDS NUMBER
VAPOR CONDENSERS