Power plants – Reaction motor – Method of operation
Patent
1988-03-09
1990-02-20
Nelson, Peter A.
Power plants
Reaction motor
Method of operation
60212, 60217, 60258, 102350, F02K 900
Patent
active
049015257
ABSTRACT:
A bi-propellant self-contained propulsion system is provided for powering rockets. A plurality of turbopump assemblies are provided to take liquid propellants from low pressure storage tanks to a substantially higher pressure thrust chamber. Substantially all of the liquid propellants are pressurized and gasified within the plurality of turbopumps. Substantially all of the gasified propellants are then used to drive the turbopumps that pressurize the liquid propellants. Gasification preferably occurs within a preburner internal to the turbopump assembly that combines a small portion of one of the propellants with a substantial portion of the other. The proportions are selected so that gasification of all of the propellants is ensured yet relatively low preburner temperatures are maintained. A multi-stage pintle assembly may be provided to vary the exit-to-throat area ratio of the nozzle. The total thrust and the mixture ratio may be controlled by shutting down some of the turbopumps. Actuation of the pintle is preferably coordinated with the shutting down of turbopumps to maintain a relatively constant thrust chamber pressure. A nozzle skirt insert is provided to enhance the low altitude performance of the rocket engine and the high altitude performance of the rocket engine.
REFERENCES:
patent: 3811820 (1974-05-01), Wharton et al.
patent: 4621492 (1986-11-01), von Pragenau
patent: 4744300 (1988-05-01), Bugiel
patent: 4771599 (1988-09-01), Brown et al.
patent: 4777794 (1988-10-01), Nielsen
Beveridge John H.
Knuth William H.
Acurex Corporation
Nelson Peter A.
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