DRYING WITH 2 RADIAL JETS - DEVELOPMENT OF RADIAL JET REATTACHMENT DRYING ARRAYS

Impinging jets are used to enhance the drying of sheet materials. Howe ver, conventional jets may produce excessive force on an impingement s urface An alternative to conventional jets, the radial jet, was invest igated. The radial jet is a new type of jet that produces a variable n et force on the impingement surface. Two impinging radial jets were us ed for drying a cotton cloth with a dry basis moisture content (DBMC) of 1.5. This was accomplished with two -10 degrees radial jet reattach ment (RJR) nozzles, which produced a net negative force on the surface . The DBMC was measured as a function of time for various rectangular test areas. The drying rate was determined as a function of area. The radial jet results were compared to two conventional in-line jets. For some conditions, the radial jets provided a greater drying rate than in-line jets. Multiple RJR nozzles can be used to assist conventional drying processes.