煤烧圆家重点实验宝 2) Bubbling bed F=△PA=AL(-E Pn-Pg(5-2) f From(5-1),(5-2) .5 Re L+CaR (5-3) Re mf Prvpp-pr go Ar For small particles, umb >umf mb=2.07exp(0.716F)d 0.06 0.347 pf (5-4) Where F is mass factor of particles with d 45um National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cnNL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn 2) Bubbling bed F = PA = AL(1− )( p −  f )g (5-2) From (5-1), (5-2)   ( ) 2 3 1 0.5 2 2 1 Re , Re      p mf  f f p f p mf mf gd Ar d U C C Ar C − = = = + − (5-3) For small particles, umb > umf ( ) ( ) 0.06 0.347 umb = 2.07exp 0.716F dp  f /  (5-4) Where F is mass factor of particles with dp < 45m