The Local Measurements of Single Phase and Boiling Heat Transfer by Confined Planar Impinging Jets

Seong Je Wu; Chang Hwan Shin; Hyung Hee Cho

The Local Measurements of Single Phase and Boiling Heat Transfer by Confined Planar Impinging Jets

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평면충돌제트에 의한 단상 및 비등 열전달의 국소적 측정

Type: Academic journal

Author: Seong Je Wu Chang Hwan Shin Hyung Hee Cho

Journal: The Korean Society of Mechanical Engineers Transactions of the Korean Society of Mechanical Engineers - B Vol.28 No.8 (WN.227) KCI Accredited Journals SCOPUS

Published: 2004.8

Pages: 895 - 901 (7page)

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The Local Measurements of Single Phase and Boiling Heat Transfer by Confined Planar Impinging Jets

Research history (3)

2004

The Local Measurements of Single Phase and Boiling Heat Transfer by Confined Planar Impinging Jets

Seong Je Wu , Chang Hwan Shin , Hyung Hee Cho Transactions of the Korean Society of Mechanical Engineers - B 2004.08 Academic journal

2002

Local Heat Transfer Characteristics in Convective Partial Boiling by Impingement of Free - Surface / Submerged Circular Water Jets

Seong Je Wu , Chang Hwan Shin , Hyung Hee Cho Korean Journal of Air-Conditioning and Refrigeration Engineering 2002.06 Academic journal

2001

Local Heat Transfer Measurements of Convective Boiling by Impingement of Miniature Water Jets

Seong Je Wu , Chang Hwan Shin , Hyung Hee Cho 대한기계학회 춘추학술대회 2001.09 Proceeding

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Single-phase convection and nucleate boiling heat transfer were locally Investigated for confined planar water Jets. The detailed distributions of the wall temperature and the convection coefficient as well as the typical boiling curves were discussed The curve for the single~phase convection indicated the developing laminar boundary layer, accompanied by monotonic Increase of the wall temperature in the stream direction. Boiling was initiated from the furthest downstream as heat flux Increased. Heat transfer variation according to the streamwise location was reduced as heat flux increased enough to create the vigorous nucleate boiling
Velocity effects were considered for the confined free-surface jet Higher velocity of the jet caused the boiling incipient to be delayed more The transition to turbulence precipitated by the bubble-induced disturbance was obvious only for the highest velocity, which enabled the boding incipient to start in the middle of the heated surface, rather than the furthest downstream as was the case of the moderate and low velocities The temperature at offset line were somewhat lower than those at the centerline for single-phase convection and partial boiling, and these differences were reduced as the nucleate boding developed For the region pnor to transition, the convection coefficient distributions were similar in both cases while the temperatures were somewhat lower in the submerged jet For single-phase convection, transition was initiated at x/W=2 5 and completed soon for the submerged jet, but the onset of transition was retarded to the distance at x/W=6 for the free-surface jet

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[학술지(정기간행물)] - / 1995 / Single-Phase Liquid Jet Impingement Heat Transfer 26 : 105 ~ 217

[학술지(정기간행물)] - / 1993 / Jet Impingement Boiling 23 : 1 ~ 132

[학술지(정기간행물)] - / 1992 / Convective Nucleate Boiling on a Heated Surface Cooled by an Impinging, Planar Jet of Water 114 : 152 ~ 160

[학술지(정기간행물)] - / 1996 / Local Jet Impingement Boiling Heat Transfer 39 : 1395 ~ 1406

[학술지(정기간행물)] - / 1988 / Boiling Heat Transfer to an Impinging Jet Spurted into a Narrow Space: Part I 17 : 71 ~ 80

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