Abstract
Punched longitudinal vortex generators in form of winglets in staggered arrangements were employed to enhance heat transfers in high performance finned oval tube heat exchanger elements. Three-dimensional hydrodynamically and thermally developing laminar flow (Re = 300) and conjugate heat transfer in finned oval tubes were calculated by solving the Navier-Stokes and energy equations with a finite-volume method in curvilinear grids. Velocity field, pressure distribution, vortex formation, temperature fields, local heat transfer distributions and global results for finned oval tubes with two to four staggered winglets ({beta}= 30{sup o}, {lambda} = 2, h =H) were presented and compared. Winglets in staggered arrangement bring larger heat transfer enhancement than in in-line arrangement since the longitudinal vortices from the former arrangement influence a larger area and intensify the fluid motion normal to the flow direction. For Re = 300 and Fi = 500, the ratios of heat transfer enhancement to flow loss penalty (j/j{sub 0})/( f/f{sub 0}) were 1.151 and 1.097 for a finned oval tube with two and four staggered winglets, respectively. (author)
Chen, Y;
Fiebig, M;
Mitra, N K
[1]
- Ruhr-Universitaet Bochum (Germany). Inst. fuer Thermo- und Fluiddynamik
Citation Formats
Chen, Y, Fiebig, M, and Mitra, N K.
Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators.
United Kingdom: N. p.,
2000.
Web.
doi:10.1016/S0017-9310(99)00157-X.
Chen, Y, Fiebig, M, & Mitra, N K.
Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators.
United Kingdom.
https://doi.org/10.1016/S0017-9310(99)00157-X
Chen, Y, Fiebig, M, and Mitra, N K.
2000.
"Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators."
United Kingdom.
https://doi.org/10.1016/S0017-9310(99)00157-X.
@misc{etde_20225251,
title = {Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators}
author = {Chen, Y, Fiebig, M, and Mitra, N K}
abstractNote = {Punched longitudinal vortex generators in form of winglets in staggered arrangements were employed to enhance heat transfers in high performance finned oval tube heat exchanger elements. Three-dimensional hydrodynamically and thermally developing laminar flow (Re = 300) and conjugate heat transfer in finned oval tubes were calculated by solving the Navier-Stokes and energy equations with a finite-volume method in curvilinear grids. Velocity field, pressure distribution, vortex formation, temperature fields, local heat transfer distributions and global results for finned oval tubes with two to four staggered winglets ({beta}= 30{sup o}, {lambda} = 2, h =H) were presented and compared. Winglets in staggered arrangement bring larger heat transfer enhancement than in in-line arrangement since the longitudinal vortices from the former arrangement influence a larger area and intensify the fluid motion normal to the flow direction. For Re = 300 and Fi = 500, the ratios of heat transfer enhancement to flow loss penalty (j/j{sub 0})/( f/f{sub 0}) were 1.151 and 1.097 for a finned oval tube with two and four staggered winglets, respectively. (author)}
doi = {10.1016/S0017-9310(99)00157-X}
journal = []
issue = {3}
volume = {43}
journal type = {AC}
place = {United Kingdom}
year = {2000}
month = {Feb}
}
title = {Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators}
author = {Chen, Y, Fiebig, M, and Mitra, N K}
abstractNote = {Punched longitudinal vortex generators in form of winglets in staggered arrangements were employed to enhance heat transfers in high performance finned oval tube heat exchanger elements. Three-dimensional hydrodynamically and thermally developing laminar flow (Re = 300) and conjugate heat transfer in finned oval tubes were calculated by solving the Navier-Stokes and energy equations with a finite-volume method in curvilinear grids. Velocity field, pressure distribution, vortex formation, temperature fields, local heat transfer distributions and global results for finned oval tubes with two to four staggered winglets ({beta}= 30{sup o}, {lambda} = 2, h =H) were presented and compared. Winglets in staggered arrangement bring larger heat transfer enhancement than in in-line arrangement since the longitudinal vortices from the former arrangement influence a larger area and intensify the fluid motion normal to the flow direction. For Re = 300 and Fi = 500, the ratios of heat transfer enhancement to flow loss penalty (j/j{sub 0})/( f/f{sub 0}) were 1.151 and 1.097 for a finned oval tube with two and four staggered winglets, respectively. (author)}
doi = {10.1016/S0017-9310(99)00157-X}
journal = []
issue = {3}
volume = {43}
journal type = {AC}
place = {United Kingdom}
year = {2000}
month = {Feb}
}