COMPARISON OF AN INTEGRAL MODEL FOR PREDICTING THE DISPERSION OF A TURBULENT JET IN A CROSS-FLOW WITH EXPERIMENTAL-DATA

The safe design of high pressure plant and pipework requires the installation of adequate pressure relief and vent stacks. To ensure that any discharge is safety removed, it is necessary to consider how the gas disperses under a variety of atmospheric conditions. This is best achieved by developing a mathematical model that has been validated against reliable data. This paper gives details of a mathematical model for predicting the dispersion of a jet in a crossflow. The model is based upon well-tried similarity ideas, and contains a number of closure or entrainment coefficients whose values must be specified. Appropriate well-documented laboratory or field-scale tests are selected to enable these values to be chosen. The predictions of the resulting model are than compared with experimental results over a wide range of conditions, including free and wind-blown underexpanded sonic and subsonic jets of natural gas and other materials. © 1990.