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US 2017/0166491 A1Published application
Hydroxylammonium nitrate monopropellant with burn rate modifier
AssigneeAerojet Rocketdyne, Inc.
InventorEdward J. Wucherer
Life of this patent
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Abstract
A monopropellant includes 30-70% by weight of an oxidizer including hydroxylammonium nitrate, 5-50% by weight of a fuel, and a burn rate modifier in a non-zero amount of up to 3% by weight. The burn rate modifier can be selected from vanadium salts, iron salts, and combinations thereof. The monopropellant is a stable liquid between −20 C and 100 C at ambient pressure.
Claims20
A monopropellant comprising:
- 30-70% by weight of an oxidizer including hydroxylammonium nitrate;
- 5-50% by weight of a fuel;
- and
- a burn rate modifier in a non-zero amount of up to 3% by weight, the burn rate modifier selected from the group consisting of vanadium salts, iron salts, and combinations thereof, wherein the monopropellant is a stable liquid between −20° C. and 100° C. at ambient pressure.
1 more element
A monopropellant comprising:
- 30-70% by weight of an oxidizer including hydroxylammonium nitrate;
- 5-50% by weight of a fuel;
- an amount, A1, by molar fraction of at least one stabilizer;
- and
- an amount, A2, by molar fraction of a burn rate modifier selected from the group consisting of vanadium salts, iron salts, and combinations thereof, wherein a ratio of A1 to A2 is greater than 1.0 to sustain combustion upon torch ignition in air at 1 atm pressure.
2 more elements
A method of preparing a monopropellant, the method comprising:
- mixing a burn rate modifier into a stock liquid monopropellant that initially does not include any of the burn rate modifier, the stock liquid monopropellant includes an oxidizer that has hydroxylammonium nitrate, a fuel, and at least one stabilizer,
- the mixture including,
- a non-zero amount of up to 3% by weight of the burn rate modifier,
- 30-70% by weight of the oxidizer,
- 5-50% by weight of the fuel, and
- up to 2% by weight of the at least one stabilizer.
3 more elements
Dependencies are inferred from the claim text.