KARAKTERISTIK TERMAL HIDRODINAMIK UNTUK ALIRAN LAMINAR DAN TURBULEN DI DALAM PIPA DENGAN BERBAGAI BENTUK SISIPAN PLAT BERGALUR
Abstract: The purpose of this
study is to investigate the thermal and hydrodynamic characteristics of air
flowing in tubes with various inserts of grooved plate. Inserts of grooved
plate with a variety of attack angles (a = 0°, 45° and 90°) has been studied in
laminar and turbulent flow. Plate inserts are installed inside the tube
intended to improve the heat transfer due to the mixing of the fluid. Numerical
simulation of three-dimensional flow set as a model in the direction of fluid
flow. The working fluid in the tube is cold, whereas hot wall temperature is
kept constant. The results showed that the grooved plate inserts increases the
heat transfer in the tube. For laminar flow, the highest heat transfer
enhancement is obtained at the grooved plate inserts α = 45° i.e. from 4.46 to
20.34% with an increase in friction factor of 172.19 to 204.36%. As for the
turbulent flow, the highest heat transfer improvement is found in a grooved
plate inserts with α = 45° i.e. from 38.67 to 56.1% with an increase in
friction factor of 183.5 to 262.29%.
Keywords: Diesel engines, NOx
emissions, Ammonia-SCR system, Ammonia injector location, Mixing index
Penulis: Syaiful, Faza
Dzulhimam
Kode Jurnal: jptmesindd150581