Table 3.

Power numbers Ne for different tested systems of vertical tubular baffles–high-speed impeller

Baffle configuration	Impeller type
	Rushton turbine Z = 6	Smith turbine Z = 6	Turbine β = 90° Z = 6	PBT β = 60° Z = 6	PBT β = 45° Z = 6	PBT β = 30° Z = 6	PBT β = 45° Z = 3	Propeller S/d = 1 Z = 3
Ne
C1		2.81	4.2		1.50		0.96	0.30
C2	4.01	2.40	3.96		1.41		0.935	0.295
C3	4.92	2.65	4.15	2.43	1.47	0.635	0.955	0.31
C4	3.77	2.31	3.96	2.31	1.42	0.60	0.96	0.325
C5	3.57	2.22	3.65	2.23	1.37	0.625	0.92	0.30
C6	4.60	2.54	4.07	2.38	1.45	0.62	0.94	0.31
C7	3.58	2.20	3.66	2.21	1.40	0.61	0.92	0.305
C8	3.37	2.11	3.72	2.14	1.36	0.59	0.91	0.305
C9	4.62	2.51	4.02	2.33	1.37	0.57	0.915	0.315
C10	3.77	2.26	3.77	2.26	1.43	0.64	0.96	0.325
C11	3.61	2.20	3.69	2.24	1.41	0.64	0.955	0.33
C12	4.87	2.64	4.12	2.43	1.49	0.65	1.02	0.35
C13	3.82	2.31	3.96	2.34	1.46	0.66	1.00	0.335
C14	3.67	2.14	3.79	2.11	1.38	0.57	0.95	0.285
C15	4.02	2.33	3.71	2.30	1.40	0.59	0.96	0.315
C16	3.85	2.32	3.80	2.29	1.45	0.635	1.00	0.345
C17	3.65	2.22	3.69	2.25	1.43	0.625	0.895	0.335
C18	4.46	2.37	4.00	2.19	1.37	0.55	0.94	0.29
C19	3.35	2.04	3.47	2.03	1.33	0.56	0.95	0.26
C20	3.42	2.00	3.47	2.10	1.34	0.56	0.93	0.28
C21	4.71	2.55	4.24	2.43	1.49	0.62	1.00	0.35
C22	3.52	2.13	3.69	2.24	1.44	0.61	0.985	0.32
C23	3.60	2.13	3.71	2.24	1.42	0.60	0.98	0.32
Planar baffles	5.75	2.8	4.35		1.46			0.33