Thermal Science 2011 Volume 15, Issue 2, Pages: 397-408
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Heat transfer performance of an oil jet impinging on a downward-facing stainless steel plate
Issa Roy J.
An experimental study is carried out for the quenching of a stainless steel
plate using a single oil jet impinging on the bottom surface of the plate.
The objective of this study is to investigate the effect of the oil jet flow
operating conditions onto the heat transfer effectiveness when the plate is
heated to temperatures ranging from around 115 to 630°C, and the oil is
heated to temperatures ranging from 60 to 75°C. Tests are conducted on the
oil at various temperatures to determine its viscosity. Experiments are
conducted for nozzle exit flow rates ranging from 113 to 381 ml/min, oil jet
pressures from 3.1 to 12 psi, and nozzle-to-plate surface distances of 0.6
and 1 cm. The variation of the oil heat flux and heat transfer coefficient
with the surface temperature for the different quenching parameters is
calculated from the acquired temperature data. Tests results show the oil
heat transfer effectiveness keeps increasing for increasing plate
temperature. Oil jet pressure is shown to have a considerable effect on the
oil heat transfer, while the nozzle-to-plate surface distance is shown to
have a lesser effect. The results of this study shall lead to a better
understanding of the parameters that play an important role in oil quenching
for applications that are of interest to the metal process industry.
Keywords: oil jet, oil pressure, heat flux, heat transfer