ISSN Online: 2688-7231
ISBN Online: 978-1-56700-478-6
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)
OPTIMAL DESIGN OF RECTANGULAR CHANNELS WITH INTERSECTING RIBS FOR ENHANCED THERMAL PERFORMANCE
Аннотация
In the present study, shape optimization of a rectangular
channel (width of the channel was twice the height, W/ H = 2) with intersecting ribs was performed using Reynolds averaged
Navier-stokes (RANS) based analysis for flow and heat
transfer, radial basis neural network (RBNN) as surrogate
model and Particle swarm optimization (PSO). The shear
stress transport turbulence model was used as closure for
turbulence modeling. Angle of attack, the ratio of position of
the intersecting rib relative to channel center-line to width of channel and ratio of height of rib to channel hydraulic
diameter were selected as design variables for optimization.
The optimization was carried out at Reynolds number of
10,000 based on hydraulic diameter of the channel. The
objective function viz. thermal efficiency was formulated using
radial basis neural network as surrogate model and particle
swam optimization was used to determine the optimal point.
The thermal performance of the channel was found to be
sensitive to the chosen design variables. As a result of
optimization, the optimal design showed an enhancement of
12.78 % in overall thermal efficiency.