EFFECT OF SLIT ASPECT RATIO ON FREE JET PROPERTIES

The dependence of certain properties of flow through two-dimensional s lits under low density conditions on the width to height ratio (aspect ratio) is investigated experimentally. The measurements, in the Knuds en number and Reynolds number ranges of 0.002-2.1 and 0.05-400, respec tively include mass flow rates and impact pressures in the jet field. The discharge coefficients were found to be strongly dependent on the slit aspect ratio. The influence of slit aspect ratio on jet structure and centreline properties has been studied using impact probes and re sults are compared with earlier measurements.