M = — 7— , (5-a) 



a w h ^ ■' 



and M = — ^ • (5-b) 



p w h 



where p is the mass density of the fluid. Thus from Equations (4), 

 (5-a) and (5-b) after simplification, one obtains 



(6) 



Again, the power jet after it leaves the separation surface, 

 behaves like a turbulent two dimensional jet. Analytical expressions 

 for the velocity distribution of such jets are derived in Schlichting' 

 and the. expression for the axial component of the jet velocity is 

 given below 



u(x,y) = U(x) Sech^ (^\ . (7) 



where u(x,y) = axial component of velocity, 



U(x) = center line velocity, 



= 7.67, a free constant. 



Figure 22 illustrates the jet co-ordinate system and its axial velocity 

 profile for o = 7.67. It is obvious from the jet axial velocity 

 profile that the slope of the jet spread i.e., angle cy (Figure 22) is 



n/= tan"-"- (0.3) = 16.7° . (8) 



The value of a calculated in Equation (8) is based upon the value of y 

 where the axial velocity drops to four percent of the center line 

 velocity, i.e., where , . Based upon this, the width of 



the jet is given by the equation 



12 



