Decahydronaphthalene as an endothermic fuel for hypersonic vehicles
AssigneeReaction Systems, LLC
InventorsBradley Dean Hitch, David Thomas Wickham, Jeffrey Robert Engel, Jacquelyn Brett Lewis
Life of this patent
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Abstract
Endothermic fuel compositions comprising 50% or more by volume decahydronaphthalene, including cis-decahydronaphthalene, trans-decahydronaphthalene or a mixture thereof, for use as fuels in hypersonic vehicles and particularly for use in dual-mode ramjet or supersonic combustion ramjet air breathing engines.
Claims20
A fuel composition which comprises 50% or more by volume of a mixture of the cis and trans isomers of decahydronaphthalene, wherein the molar ratio of cis to trans isomers ranges from 3.5 to 1.0 and which optionally comprises 0-3% by volume of tetrahydronaphthalene, 0-3% by volume of naphthalene, 0-10% by volume of methyl alcohol, ethyl alcohol, n-propyl alcohol, or a mixture thereof, and 0-25% by volume of methylcyclohexane.
A fuel composition which comprises 50% or more by volume of a mixture of the cis and trans isomers of decahydronaphthalene, wherein the molar ratio of cis to trans isomers ranges from 10 to 0.1 and which comprises 0.1 to 10% by volume of methanol, ethanol, n-propanol or a mixture of any two thereof and/or 1 to 25% by volume of methylcyclohexane and which optionally comprises 0-3% by volume of tetrahydronaphthalene, and/or 0-3% by volume of naphthalene.
Dependencies are inferred from the claim text.