- I)l 



^ 1 kfefep 





^ — /l^l?-TT 



'*~ 1 1 1 



'1 1 ^1 



■*- \ w 



1 /I 1/ 1 V \ 



MfflTfffl 



Figure 190 - Flow net for a two-dimensional jet striking a wall perpendicularly 

 (Copied from Reference 183.) 



"^^p^-vi — —J a .. 



J, t Os 0J5 Ty 



Figure 191 — Flow net for a two-dimensional jet striking a wall at 45 degrees. 

 (Copied from Reference 183.) 



117. OTHER FREE-STREAMLINE PROBLEMS. 



The literature on potential flow with free streamlines is extensive. A good summary up 

 to 1920 was given by Jaffe.^^^ Many authors have followed Levi Civita'^^ in using, instead 

 of t, a variable on whose plane the s-plane corresponds to a semicircle; in terms of this variable 

 w is everywhere analytic. The later general discussions given by Cisotti and by Bergmann 

 may be mentioned; see also Reference 2, Sections 12.40-12.47. 



293 



