Experimental Research of the Effects of Superfine Aluminum Powders on the Combustion Characteristics of NEPE Propellants

Fang, Chong; Li, Shufen

doi:10.1002/1521-4087(200203)27:1<34::aid-prep34>3.0.co;2-3

Cited by 23 publications

(4 citation statements)

References 3 publications

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“…Although Al powder has a high energy density, there are still some defects in the combustion process: the solid Al 2 O 3 film on the surface of Al powder causes a long ignition delay, and it tends to agglomerate during the combustion process, resulting in long combustion time and incomplete combustion, and the products are easily agglomerated, etc. These problems greatly limit the further improvement of propellant performance [5][6][7][8][9][10][11][12]. Studies have shown that the oxidation activity and reaction completeness of aluminium-based alloy powders are significantly better than that of single Al powders.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo‐Containing Additives on Combustion of Al‐B Fuels

Meng

Cai

2023

Propellants Explo Pyrotec

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In this study, the Al-B-Mo alloy powders with a boron content of 7 wt % and Molybdenum content of 0.5-3 wt % were prepared by the close-coupled gas atomization. The powder morphology, phase composition, oxidation, and exothermic behavior of combustion were characterized. The results show that the addition of Mo effectively improves the energetic properties of the alloy powder, with the mass-burning enthalpy of Al-7B-1Mo reaching 31111 J/g, exceeding the theoretical mass-burning enthalpy of monolithic Al (31000 J/g). Al-7B-1Mo underwent a violent exothermic process at around 1000 °C, and the oxidation weight gain ratio and oxidation efficiency reached 46.16 % and 48.05 % respectively, an increase of 19.75 % and 21.08 % compared to Al-7B. The mesh structure formed by the AlB 2 phase on the particle surface positively promoted the particles' thermal oxidation. Mechanical mixtures of AlB 2 /Mo and AlB 2 /MoO 3 were prepared and the catalytic promotion of the combustion of AlB 2 by Mo and MoO 3 was confirmed by thermal tests of combustion. The mechanism by which Mo/MoO 3 promotes the combustion of AlB 2 was investigated through the phase composition characterization of the composite powder after heat treatment in argon and air atmosphere. It was confirmed that MoO 3 promotes the oxidation and combustion of AlB 2 by supplying oxygen to B in AlB 2 , while Mo is first oxidized to MoO 3 , which then promotes the combustion of AlB 2 .

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Section: Introductionmentioning

confidence: 99%

Effect of Mo‐Containing Additives on Combustion of Al‐B Fuels

Meng

Cai

2023

Propellants Explo Pyrotec

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“…Al is a prospective energetic fuel that exhibits a considerable advantage due to its high energy, safe byproducts, and low preparation cost. It is frequently utilized as a highenergy propellant component [3][4][5][6][7]. Al has undergone substantial research as a powder fuel for new propulsion systems with the development of powder ramjet technology [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders

Lu,

Ma,

Guo

et al. 2023

Materials

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Powder ramjets are a kind of vehicle propulsion system with high specific impulse and efficiency. They provide significant benefits in terms of extended propulsion and thrust adjustment. The pursuit of a highly reactive fuel appropriate for powder ramjets is likely to stimulate advancements in innovative propulsion systems, which are crucial for deep space exploration and long-term space missions. This work presents experimental studies on the thermal oxidation and laser ignition performance of aluminum–magnesium–lithium powders at atmospheric pressure. TG-DSC curves of powders in three heating rates were obtained. The ignition processes and ignition delay times were recorded by a CO2 laser ignition experiment system at a laser power of 10~60 W. The results show that at a lower heating rate of 10 K/min, the powder’s thermal hysteresis is less, and the powder energy released in stage I is more concentrated. However, the degree of heat release concentration approached a similar level at heating rates of 30 K and 50 K. The ignition delay time decreased as the laser flux density increased. When the laser flux density exceeds 80 W/cm2, the effect of laser power on the ignition delay time decreases. At atmospheric pressure, the mathematical relationship between ignition delay time and laser flux density is given. Finally, the powder ignition processes at different laser powers are represented graphically.

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“…Metal fuel [1][2][3][4][5] (such as aluminum, magnesium, iron, boron, beryllium, and lithium) is one of the new energy sources to replace the traditional fuel, which can significantly increase the energy and density of the power system of the land and water transportation pressure), and releases a large amount of energy. The energy density (taking aluminum water reaction metal fuel as an example) is 4-6 times of that of fuel oil, and there is no waste gas pollution, which can make up for the shortage of current energy and has a broad application prospect [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2020

Int J Metall Met Phys

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Nano metal powder is a promising new type of fuel because it can replace the traditional non renewable energy, and could be the subject of tremendous practical and research interest for future land and water transportation. In this study, the energy performance of several typical metal fuels were compared and analyzed, and the results show that the energy density of aluminum based metal fuel is as high as 40.91 MJ × 103•m-3, the combustion heat value of reaction between iron powder and oxygen is as high as 58.14 MJ/L. In addition, the research progress of metal fuel (nano Al, Fe powder) motor technology at home and abroad was summarized, and the results show that the specific impulse of nano aluminum based water reactive metal fuel engine can reach 4900 N•s/kg, and that of nano iron based oxygen reaction metal fuel engine can reach 3500 N•s/kg when the combustion chamber pressure and temperature are 5 MPa and 3800 K, respectively. This will provide a reference for promoting the innovation of new energy science and technology.

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Experimental Research of the Effects of Superfine Aluminum Powders on the Combustion Characteristics of NEPE Propellants

Cited by 23 publications

References 3 publications

Effect of Mo‐Containing Additives on Combustion of Al‐B Fuels

Effect of Mo‐Containing Additives on Combustion of Al‐B Fuels

Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders

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