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5 . VOLUME RATE OF CONTAMINATED AIR AT 1400 DEGREES <br /> ( 15 , 000 SCFH ) ( 1 , 400 + 460 ) = 27 , 900 , 000 <br /> - - - - - - - - - - - - - = 14 . 90 CF/SEC <br /> ( 3600 ) ( 60 + 460 ) = 11872 , 000 <br /> 6 . TOTAL VOLUME RATE OF 250 CFM OXIDIZER <br /> ( 7 . 14 CF / SEC ) + ( 14 . 90 CF / SEC ) = 22 . 04 CF/ SEC <br /> 7 . AREA OF OXIDIZER THROAT FOR MIXING <br /> 22 . 04 CUBIC FEET PER SECOND <br /> - - - - - - - - - - - - - - - - = 1 . 469 SQUARE FEET <br /> 15 FOOT PER SECOND VELOCITY <br /> DIAMETER = 16 . 5 INCHES <br /> 8 . AREA OF OXIDIZER CHAMBER <br /> 22 . 04 CUBIC FEET PER SECOND <br /> - - - - - - - - - - - - - - - - - - = 2 . 204 SQUARE FEET <br />{ 10 FOOT PER SECOND VELOCITY <br /> DIAMETER = 20 . 125 INCHES <br /> 9 . LENGTH OF OXIDIZER CHAMBER <br /> 10 FEET OF LENGTH <br /> - - - - - - - - - - - - - - - - - - - - - - = 1 SECOND RETENTION <br /> 10 FOOT PER SECOND VELOCITY <br />