D., Sisson R.
The effects of agitation and part location on cooling rate and heat transfer coefficient for the CHTE quench probe in a tank has been investigated experimentally and with computational fluid dynamics software, Fluent. It was found that the most concentrated and highest velocity flow field was achieved with an impeller speed of 1440 rpm and develops along the side wall in the quenching region of the tank. It was also found that flow vertically along the surface of the probe provides approximately 20% faster cooling times than flow that crosses the probe surface horizontally. It was found that with the current impeller and baffle used, part location as well as agitation has a significant effect on both cooling rate and resulting heat transfer coefficient. An impeller rotational speed of 1440 rpm with the probe closest to the side wall of the agitation region provided the fastest cooling time compared to all other 11 tests. The average heat transfer coefficient without agitation is 305.9 W/m*K and the highest average heat transfer coefficient for all the experiments was 571.1 W/m*K at the agitation of 1440 rpm and position along the side wall.
Worcester Polytechnic Institute
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