Effect of an Impinging Jet on Horizontal Cylinder Cooling

Abstract

Investigating the quenching phenomena has an important impact on many applications such as steel hardening and cooling in nuclear power plants. Few studies investigated the usage of liquid slot jets. Experimental and numerical investigations have been conducted on the effect of quenching of hot horizontal stainless-steel cylinders by sub-cooled liquid slot jets. The temperatures, the cooling rates, heat flux, and the behavior of the maximum heat fluxpoint have been experimentally investigatedfor changing different parameters, such as the cylinder initial temperature (between 400 and 600°C), the coolant temperature (with degrees of sub-cooling between 20 and 60°C), the coolant velocity (between 1.0 and 1.5 m/s), and the coolant type (including fresh water, and saline water 1%). The coolant was impinged from a slot of 1.3 mm width that covered the whole length of the cylinder. The slot was 5 cm above the cylinder in the vertical direction, so as to be parallel to the cylinder axis.A previous numerical model for circular jets using AVL-FIRE software was modified and validated for the slot jets as well.