Horizontal Jet Penetration into Powder Beds under Different Aeration Conditiong

Abstract

Experimental measurements were made of the behavior of a horizontal gas jet in a powder bed under various aeration conditions. Data on particle velocity in a jet and the relationship between jet penetration length and various operating conditions are illustrated in this paper. Among the factors affecting the jet length, momentum of injected gas and powder pressure at the level of jet axis are found to be most important.
A mechanistic model is presented and solved approximately to give a correlation for horizontal jet length. Predictions from the correlation are compared with experimental data including those by previous investigators. Prediction with an accuracy of 30% can be obtained by the present correlation for a wide range of operating conditions covering blast furnaces, fixed beds and fluidized beds.