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Convective Heat Transfer Near One-Dimensional and Two-Dimensional Wall Temperature Steps
Oleh:
Moffat, Robert J.
;
Eaton, John K.
;
Mukerji, Debjit
Jenis:
Article from Bulletin/Magazine
Dalam koleksi:
Journal of Heat Transfer vol. 126 no. 2 (Apr. 2004)
,
page 202-210.
Topik:
temperature
;
convective heat transfer
;
wall temperature steps
Ketersediaan
Perpustakaan Pusat (Semanggi)
Nomor Panggil:
JJ90.8
Non-tandon:
1 (dapat dipinjam: 0)
Tandon:
tidak ada
Lihat Detail Induk
Isi artikel
Steady - state experiments with one - dimensional and two - dimensional calorimeters were used to study the convective heat transfer near sharp steps in wall temperature in a turbulent boundary layer. Data acquired under low and high freestream turbulence conditions indicated that spanwise turbulent diffusion is not a significant heat transport mechanism for a two - dimensional temperature step. The one - dimensional calorimeter heat transfer data were predicted within ± 5 percent using the STAN7 boundary layer code for situations with an abrupt wall temperature step. The conventional correlation with an unheated starting length correction, in contrast, greatly under - predicts the heat transfer for the same experimental cases. A new correlation was developed that is in good agreement with near and far - field semi -analytical solutions and predicts the calorimeter heat transfer data to within ± 2 percent for temperature step boundary condition cases.
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