Further, an amplifier capable of modulating gas flows can be 

 designed using the technique described in the report. Therefore, a 

 system to mix gases can be designed. One restraint on such a system 

 is that the flow through the amplifiers must be incompressible which 

 means the supply pressures should be in the 2 psig range. 



CONCLUSIONS 



1. A double leg elbow amplifier capable of modulating water flow rate 

 of 5.85 gpm with linear output flow characteristics was developed. 

 The amplifier has a relatively high gain of 50 and can modulate the 

 flow through its output from 5.85 gpm to zero when the control flow is 

 changed from zero to 0.267 gpm. Because of low pressure inside the 



amplifier, it is extremely sensitive to the output impedance and thus 

 its output ports must be designed carefully for its proper operation. 



2. Analytical expressions which predict the amplifiers output flow 

 within 10 percent of their actual values were developed. These 

 expressions are alsD useful in designing a double leg elbow, amplifier 

 with a given flow capacity. 



3. A mixing system using two such amplifiers was designed and tested 

 successfully by mixing a liquid with a liquid. A system to mix gases 

 can be designed by the method and the theory discussed in the report. 



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