Transient, high rate, closed system cryogenic injection
First Claim
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1. A hydrogen injection system comprising:
- a liquid hydrogen source,a liquid hydrogen storage tank connected to the source,a liquid hydrogen transfer system connected to the tank that feeds liquid hydrogen from the storage tank to a liquid hydrogen pump,the liquid hydrogen pump connected to the liquid hydrogen transfer system,a liquid hydrogen outlet connected to the liquid hydrogen pump for moving liquid hydrogen from the liquid hydrogen pump,a hydrogen accumulator connected to the liquid hydrogen outlet,wherein the liquid hydrogen pump charges the hydrogen accumulator to a high pressure,a light gas gun closed combustion chamber connected to the hydrogen accumulator,wherein the hydrogen accumulator injects measured batches of hydrogen into the closed combustion chamber.
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Abstract
The new injection system provides rapid, high pressure, high density, and transient batch injection of cryogenic liquids. The system stores and maintains the temperature of liquids in vacuum jacketed tanks, increases pressures using pumps, and stores the high pressure fluid in accumulators. The accumulator periodically injects the fluids at high pressure in measured mass batches into a combustion chamber. The system injects enough liquid or gas in 0.5 to 3.0 seconds to provide 500 to 6500 psi in a closed chamber.
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Citations
17 Claims
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1. A hydrogen injection system comprising:
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a liquid hydrogen source, a liquid hydrogen storage tank connected to the source, a liquid hydrogen transfer system connected to the tank that feeds liquid hydrogen from the storage tank to a liquid hydrogen pump, the liquid hydrogen pump connected to the liquid hydrogen transfer system, a liquid hydrogen outlet connected to the liquid hydrogen pump for moving liquid hydrogen from the liquid hydrogen pump, a hydrogen accumulator connected to the liquid hydrogen outlet, wherein the liquid hydrogen pump charges the hydrogen accumulator to a high pressure, a light gas gun closed combustion chamber connected to the hydrogen accumulator, wherein the hydrogen accumulator injects measured batches of hydrogen into the closed combustion chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17)
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13. A hydrogen injection system comprising:
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a source of a liquid substance, a liquid storage tank connected to the source, a liquid transfer system connected to the tank that feeds liquid from the storage tank to a pump, a liquid pump connected to the liquid transfer system, a liquid outlet connected to the pump for moving liquid from the pump, a liquid accumulator connected to the outlet, wherein the pump charges the accumulator to a high pressure, wherein the accumulator provides high volume storage at high pressure, wherein the accumulator comprises an inner liquid tank with an outer liquid tank and wherein liquid is supplied to the outer tank and gas is exhausted from the outer tank for maintaining the temperature and pressure of the liquid and gas in the inner tank, a mass flow meter connected to an injector allowing precise control of the mass of high-pressure liquid provided by the accumulator through the injector into a closed chamber of a light gas gun, wherein the injector further comprises large fluid flow lines in the injector reducing pressure drop and minimizing injection time for a high cycling rate, wherein the accumulator rapidly injects measured batches of liquid into the closed chamber, wherein the liquid is injected transiently for a period of 0.5 to 2.0 seconds at high liters per second rates, wherein the injection occurs at high pressures (500 psi to as high as 6,500 psi), wherein the substance is either liquid or dense, very cold hydrogen gas at cryogenic temperatures.
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14. The method of injecting fuel and oxidant into a light gas gun chamber comprising:
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separately providing sources of liquid hydrogen and liquid oxygen, separately storing the liquid hydrogen and liquid oxygen in storage tanks, surrounding the storage tanks with vacuum jackets, separately withdrawing liquids from the storage containers, moving the liquids through precoolers, separately transferring the liquids to inputs of separate steady state pumps, separately pumping the liquids from ambient pressures to elevated pressures up to 8000 psi, conducting the liquids under pressure to inner tanks of accumulators, maintaining liquid nitrogen in outer tanks of the accumulators, maintaining temperatures and pressures of the liquids in the inner tanks, and transiently or steadily injecting measured masses of the liquids into a closed combustion chamber of a light gas gun.
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Specification