THEORETICAL AND EXPERIMENTAL INVESTIGATION OF A GAS-DRIVEN JET PUMP FOR ROCKET ENGINES,
Interim rept. no. 1,
PURDUE UNIV LAFAYETTE IN JET PROPULSION CENTER
Pagination or Media Count:
The possibility of a simpler propellant pump than the turbopump for rocket-propelled vehicles is investigated. The gas-drive, jet pump offers a possibility and has no moving mechanical parts. The gas for driving the pump mixes with a portion of the liquid discharged from the pump. A two-phase mixture is formed which is accelerated to a high velocity by expanding it to the lower pressure at the inlet of the pump. The two-phase jet than mixes with and accelerates the liquid entering the pump. The drive gas is then separated from the liquid and exhausted to the atmosphere. The high velocity liquid then enters a diffuser which converts most of the dynamic pressure of the liquid into static pressure at the outlet of the pump. An experimental gas-drive jet pump was as successfully operated, employing air as the drive gas for pumping water. The gas consumption was impractically large, but subsequent experiments indicated that it may be possible to develop a reasonably efficient gas-drive jet pump. Experiments with jet pumps and jet pump components are described, and several possible designs for gas-drive jet pumps are discussed.