AN EXPERIMENTAL STUDY OF TWO-DIMENSIONAL JET-IMPINGEMENT HEAT/MASS TRANSFER IN A CONFINED CROSS-FLOW
A two-dimensional jet discharging into a confined cross-flow has been studied in order to obtain data that can aid the design of slot jet-impingement systems, particularly metal reheating furnaces. The exhaust flow from upstream jets is usually removed from one end of such systems, thereby creating the cross-flow. Flow and heat transfer measurements are reported for a single air jet injected into an essentially uniform cross-flowing airstream, using a small-scale isothermal or 'cold-flow' experimental model. The variation in the local heat transfer coefficient beneath the jet was derived from mass transfer measurements, of the sublimation of a naphthalene thin-film from the target surface, via the Chilton-Colburn analogy. The corresponding flow field was evaluated using a smoke tracer technique and five-hole pitot-tube traverses.