Pallabazzer 

 /3g overall expansion ratio for underwater nozzle (=p- /p„) 

 /3J overall expansion ratio for surface nozzle (=p. /p^) 



/3^ critical expansion ratio (=p. /p^) 



yS ratio of chamber pressure to atmospheric pressure 



(=Pi/p3 = /^e') 



7 inflow mass ratio (=ma/mH) 



7jj water specific weight (kg/m^) 



S turbine flow rate fuel fraction at the bypass burner 



(referred to a^m^) 



A discriminant [Eq. (20)] 



AHg internal losses (m) 



s/3 dimensionless pressure loss at the valves (=Ap/pg) 



e mixing mass ratio (=mg/mH) 



^t' ^c' ^f thermodynamical efficiencies (turbine, compressor, and 

 bypass compressor) 



^„., v„^, !„( mechanical efficiencies, for the above 



mt 'mc ''mi ' 



ri^ combustion efficiency 



propulsive efficiency [Eq. (27)] 



V 



Tj the same, for truncated nozzle 



v^ overall powerplant efficiency [Eq. (28)] 



6 cross- section augmentation coefficient [Eq. (23)] 



k mixing volume ratio (Eq. (9)] 



k^ chamber value of k 



B. overall internal losses coefficient [Eq. (2)] 



1166 



