TURBULENT CONVECTIVE MASS-TRANSFER DOWNSTREAM OF A PERFORATED BAFFLE BLOCKAGE

An experimental investigation has been performed to determine convective heat transfer downstream of a perforated baffle blockage situated on the lower principal wall of a rectangular duct. The experiments were carried out via a mass transfer technique, which enabled a local measurement of transfer coefficients. The study was confined to blockage ratio h/H = 0.5, the Reynolds number ranged from 5,000-30,000, and the test duct had a 5:1 aspect ratio. The performance evaluation indicated that, under identical mass flow, the baffle plate improved the transfer coefficients, while under other constraints no improvement was observed.