Q = 4.0 gpm and Q =5.0 gpm. 

 P a 



For a given power jet separation surface, the slopes of its 

 deflection characteristics depend upon the active and passive leg 

 flow passage dimensions, and the flows through them. Thus, if it 

 is the slope of the power jet characteristics, then 



s - s (Q^, Q^, h, w^, Wp) Q^/Q^, (1) 



s = « (Q^, Qp/Q^, h, w^, w^, Wp) Q^/Q^. (2) 



where 



and 



h = depth of the flow passages 



w = width of the active leg 

 a '^ 



w = width of the passive leg 

 P 



Hence, from Figure 20, the power jet deflection, A^', using Equation (2) 

 can be written as 



h^ - s(Q^, Qp, Q^, h, w^, w^/Wp) Q^/Q^ , (3-a) 



or simply Ai|; = Q /Q . (3-b) 



In Equation (3-b), if Aij; is expressed in degrees, then the units of s 

 are in degrees. Further, s for each characteristic curve can be cal- 

 culated using Equation (3-b) . Table 4 shows values of s for various 



Q , /n for the element with fixed h, w and w /w . 

 a p "a a a p 



Amplifier Theory 



The interacting active and passive flovzs of the element shown in 



Figure 21, combine to form the power iet. If M and M are the momentum 



an 

 of the active and passive leg flovrs respectively, then the momentum of 



the power jet, M . is given by 



M = /m ^ + M 2 . (4) 



r V a p ^ ' 



Equation (4) holds for the configuration shown in Figure 21 only 

 where the angle between the active and passive legs is 90 . Further, 

 the momentum of the active and passive leg flows in terms of their 

 flow rates and flow passage area, neglecting static pressure changes 

 are given as 



10 



