Heat transfer and pressure drop in two-pass rib-roughened square channels with bleed from sharp bend
作者： Shyy Woei Chang , Zong-Xian Cai
DOI: 10.1016/J.IJHEATFLUIDFLOW.2009.11.001
关键词: Heat transfer 、 Pipe flow 、 Nusselt number 、 Coolant 、 Turbine blade 、 Mechanics 、 Materials science 、 Bleed 、 Pressure drop 、 Airflow
摘要: Abstract This experimental study investigates the heat transfer, pressure drop and thermal performance factor for two-pass rib-roughened channel with without bleed from its sharp bend. Detailed distributions of Nusselt number ( Nu ) dimensionless wall temperature η w over rib floor coolant extractions three different locations on outer bend at 0%, 10%, 20%, 30% total airflow rate are comparatively analyzed 5000 Re coefficients f entire ribbed generated factors compared. The provides considerable transfer enhancements (HTE) turning section substantial reductions in drops; while undermines both performances outlet-leg no-bleed conditions. Thermal each Re condition tested improved references. Empirical correlations derived present square bleed.
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