Metal Combustion in Steam

Fuhs, Allen E.; Buck, Jerome A.; Hallenbeck, Amos Edward.; Strott, John B.

doi:10.1111/j.1559-3584.1985.tb01322.x

Cited by 2 publications

(1 citation statement)

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“…Against the aluminium-water reaction, considering its high energy density coupled with its 'green' property, many theoretical and experimental attempts including a basic combustion mechanism have been implemented. Most of the achievements that provide a feasible validation of the aluminiumsteam reaction utilized for underwater vehicles have been attributed to the efforts of Fuhs, Foote, Miller, and co-workers [9][10][11][12][13][14][15][16]. However, Risha and others [17][18][19][20][21] from Pennsylvania University implemented a departure from previous work in suggesting that nano-metallic particles are more promising in a practical application due to their relatively high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

A theoretical investigation of thermodynamic performance for a ramjet based on a magnesium—water reaction

Yang

2009

Proceedings of the Institution of Mechanical Engineers, Part M:

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A preliminary study on the operating performance of a certain kind of water ramjet engine was implemented theoretically. With regard to this proposed powerplant operating in an available water environment, inspiration drawn from a supercavitation phenomenon coupled with a hydroreactive characteristic of several metals was the inducement for its attractive development. In terms of the requirement to provide the highest possible performance, a multiple water-injection mechanism was employed; i.e. the introduction of sufficient ambient water was suggested in order to maintain a successful combustion, while in the meantime not being too large to avoid a potential condensation phenomenon at the nozzle exit. Then against a ramjet carrying a metal fuel grain with a 50 per cent magnesium mass fraction, a performance analysis proceeded on the basis of a proposed thermodynamic calculation theory. The upper limit of the primary water-fuel ratio was predicted as 2.4 when considering the conditional temperature of the main magnesium-water reaction. Peak values of both specific impulse and thrust exist on the order of 4695.86 N s/kg and 2.57 kN respectively, while the water-fuel ratio approached 4.2. Furthermore, rules governing the characteristic velocity along with the water-fuel ratio were also examined. Then, altering physical conditions such as metal fuel formation and chamber pressure, a conclusion was drawn that a higher performance was related to a relatively higher chamber pressure and a higher magnesium mass fraction as long as normal working conditions were guaranteed.

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