Number of Baffles

Normally, baffles are equally spaced. The minimum baffle spacing is one-fifth of the shell diameter, but not less than 2 in. and maximum baffle spacing is 74Do where D is the outside tube diameter in inches [3]. 

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Nq = Number of baffles in series per shell pass Sb = Cross-sectional area for flow around segmental baffle, ft ... 

B = number of blades on impeller R = number of baffles = agitator diameter H = liquid height... 

Apb = pressure drop across window opening of segmental baffles, total for all baffles, psi Ap,. = pressure drop across the bundle in cross-flow, psi s = specific gravity of gas or liquid referenced to water = number of baffles... 

From the chart, read Ap] g per haffle, as psi. To obtain total longitudinal drop, multiply hy the number of baffles. 

Pj = shell-side pressure drop, psi friction factor, fP/ in. cross-flow mass velocity, lb/ (ft ) (hr) shell I.D., ft = number of baffles... 

Shell side Number of cross-passes (number of baffles -t 1) Number of passes Side two... 

A. The location of sash tracks and the number of baffles and slots provided are integral to the proper containment of materials. 

The number of clearances Nc can be found from Nt, based on either square pitch or equilateral pitch. The flow area Sa is obtained from v0 (flow normal to a tube bundle). Finally, baffle spacing (or the number of baffles) is computed from SQ, A0, Nt, and Nc. 

The shell side is provided with a number of baffles to promote high velocities and largely more efficient cross flow on the outsides of the... 

Select the kinds and number of baffles on the shell side. 

Nomenclature d =tube diameter, D = impeller diameter, L = plate coil height, N = impeller rotational speed, nb = number of baffles or of vertical tubes acting as baffles, T = tank diameter, Z = liquid height... 

Brakes, Muzzle Short cylindrical extensions for the muzzle of a cannon, having a number of baffles on the inside, against which the gases, following the projectile from the tube, strike. The gases exert a forward force on the baffles that partially counteracts the rearward force of recoil and thereby reduces the force of recoil Refs 1)0. W. Strickland et al, "General Summary of Explosive Plants , PB Rpt No 925)1945),83 2)TM 9.2305(1947), 10 54... 

B0 = roughly the number of tube crosses = number of baffles + 1=6. Nr = number of tube rows across which shell fluid flows = 23 minus the tube rows that pass through the cut portions of the baffles. With 25 percent cut baffles, the fluid will flow across approximately one-half of the tubes. In this case, Nr will be taken as 14. This gives some allowance for neglecting friction due to reversal of flow direction and friction due to flow parallel to the tubes ... 

De = clearance between tubes to give smallest free area across shell axis 716 = number of baffle spaces = number of baffles + 1... 

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