Figure 164 — Streamlines past a grating or 



grille consisting of semi-infinite plates 



symmetrically placed. (Copied from 



Reference 133.) 



The penetration into the grating spaces is small. On one of the plates, where ip = 

 and a; < 0, 



w=ycot— ^=±ye' 

 aV 



2nx 



1-e 



[97g] 



after solving Equation [97b] for (/i in terms of x. 



A uniform stream at velocity U parallel to the plates can easily be added. Then a 

 representation is obtained of a stream that approaches at velocity yJU + V and at an angle 

 tan~^ (V/U) with the plates, and flows off between them. Part of the streamlines and flow 

 net for such a case are shown in Figure 166, in which the plates extend off toward the right. 



Figure 165 — Oblique flow (without circulation) past and 

 through a grating as described under Figure 164. 

 (Copied from Reference 135.) 



243 



