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spiveycool
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I am building a liquid fueled rocket engine driven gas generator. I plan to use gasoline for fuel and oxygen gas at a rate of .022lb/sec and O2 at .055lb/sec The chamber is 2.15 in long 1.15 in id with a .238 nozzle. The chamber pressure should be 300 psi with a thrust of 20 pounds. I calculate the thermal output at 2583 BTU/sec. The velocity should be about 1mi/sec. This is a copy of the engine described in ROCKETLABS -How to design,build and test small liquid fueled rocket engines'.T I am trying to calculate the rate of water injection in lb/second required to reduce the temp/pressure of the output of the thrust stream to a high velocity 1200 degree gas stream suitable to drive a turbine. I am open to ideas on the location,angle and configuration of the water injector nozzles and the proper turbine A/R ratio required to optimize this this type of thrust. What thrust nozzle style would be appropriate for expansion of hot gas stream when expanding the thrust to turbine intake. What would be the proper cross section of the entrance to the turbine volute. Any thoughts on the matter would be welcome
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