Effect of nano-sized aluminum additive on wall heat transfer characteristics of the liquid-fueled scramjet engine

Jin, Yushu; Dou, Suyi; Xu, Weiwei; Yang, Qingchun; Xu, Xu; Pan, Lun

doi:10.1016/j.applthermaleng.2021.117387

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…Due to its excellent performance, mature synthesis technology, and low cost, it has been listed as the standard missile fuel in the United States 20,21 and used in hypersonic aircraft and scramjet engines in recent years. [22][23][24] The latter is one of the high-density hydrocarbon fuels with the greatest application potential at present. Its higher density and volume heat value have received increasing interest from the research groups in China 25 and the United States.…”

Section: Slurry Fuels Preparationmentioning

confidence: 99%

Propulsive and combustion behavior of hydrocarbon fuels containing boron nanoparticles in a liquid rocket combustor

Jin

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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Nano-sized energetic particle as fuel additives is of great significance for liquid hydrocarbon fuels that will exhibit high-density and high-calorific value in high-speed propulsion systems. An experimental investigation has been conducted to determine the propulsive and combustion behavior of hydrocarbon fuels containing boron nanoparticles. In this study, nano-sized boron particles with average diameter of 20 nm are added into the basic fuel JP-10 and quadricyclane, respectively. They are then referred as slurry fuels and burned in the rocket combustor using pure oxygen as the oxidizer. With a wide range of excess oxidizer coefficients, three parameters characterizing the propulsion performance are employed to evaluate the effect of boron nanoparticles on hydrocarbon fuels. It is found that the boron-based slurry fuel showed superior density specific impulse. It is increased by 1.18% and 1.44% when the addition of boron particles with 10% mass fraction are added into the basic fuel JP-10 and quadricyclane, respectively. Combustion depositions of the boron-based slurry fuel located at different positions are then collected for deep analysis by means of the energy dispersive spectrometer, X-ray diffractometer, and scanning electron microscope. Comprehensive microanalysis results demonstrate that boron particles first combine with the C-element in the hydrocarbon fuel to form the boron carbide with a reticular structure, and then the boron carbide oxidizes to form block-shaped boron oxide. However, the surface boron oxide hindered the further reaction of the internal boron carbide, which limits the energy release of the boron particles and ultimately leads to the unsatisfactory combustion efficiency of the slurry fuel.

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Section: Slurry Fuels Preparationmentioning

confidence: 99%

Propulsive and combustion behavior of hydrocarbon fuels containing boron nanoparticles in a liquid rocket combustor

Jin

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…5 To overcome these limitations, the use of energetic materials as nanoadditives into the fuel, which is referred to as nanofluids, has been studied to enhance the combustion properties. 6 Energetic materials are a class of materials with large amounts of stored chemical energy that can undergo exothermic oxido-reduction reactions to release a large amount of energy. 7 Various metals, including aluminum, boron, magnesium, zinc, titanium, and lithium are known to be energetic materials.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Scramjet engines mainly use exo-tetrahydrodicyclopentadiene (exo-THDCPD), which is the major component of high-energy-density JP-10, an endothermic hydrocarbon fuel with a high gravimetric calorific value (9697 kcal kg –1 ), high density (0.94 kg L –1 ), and low freezing point (−79 °C), which enables the flight to operate above Mach 5; therefore, these engines are primarily used in weapon systems. , However, exo-THDCPD has limitations as a jet fuel due to its low hydrogen-to-carbon ratio, which reduces the combustion efficiency of the scramjet engine, and poor atomization during pyrolysis and oxidation . To overcome these limitations, the use of energetic materials as nanoadditives into the fuel, which is referred to as nanofluids, has been studied to enhance the combustion properties …”

Section: Introductionmentioning

confidence: 99%

Designing Novel Dual-Silane-Capped Boron Nanoparticles for Jet Fuels Targeting Simultaneous Enhancement in Combustion and Dispersion Stability

Jekal,

Otgonbayar,

Chu

et al. 2024

Energy Fuels

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Dual-silane-capped boron nanoparticles (DS-BNPs) with enhanced dispersion stability in jet fuels were synthesized for the first time. To this end, a complete dual-silane capping process was implemented via continuous stirring under standard reference conditions. The ratio of dual-silane was adjusted to optimize the experimental procedure for successfully capping the BNPs. The same amount of silane could completely cap the surfaces of the BNPs. The morphological and chemical changes, thermal properties, and comprehensive behavior of the BNPs after single-and dual-silane capping were investigated by using analytical methods. The analysis results indicated the successful dual-silane capping of the BNPs owing to the oxide layer and its hydroxyl group, which enabled the organic groups of silane to replace the hydroxyl groups of the BNPs, resulting in successful surface modification by the condensation reaction. The DS-BNPs showed excellent dispersion stability in jet fuels for 50 days without sedimentation and the shortest combustion time (1300 ms) with the highest calorific value of 10,734 kcal kg −1 . Surface modification successfully achieved optimal dispersion stability and increased the energy content of the nanofluid fuel. This study highlights the significant benefits of DS-BNPs as promising materials for nanofluid fuels to improve the performance of jet fuels.

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A Review on the Selection of Materials and Heat Transfer Properties in Scramjet Engines

Bordoloi¹,

Pandey²,

Choubey³

2022

Lecture Notes in Mechanical Engineering

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Effect of nano-sized aluminum additive on wall heat transfer characteristics of the liquid-fueled scramjet engine

Cited by 9 publications

References 27 publications

Propulsive and combustion behavior of hydrocarbon fuels containing boron nanoparticles in a liquid rocket combustor

Propulsive and combustion behavior of hydrocarbon fuels containing boron nanoparticles in a liquid rocket combustor

Designing Novel Dual-Silane-Capped Boron Nanoparticles for Jet Fuels Targeting Simultaneous Enhancement in Combustion and Dispersion Stability

A Review on the Selection of Materials and Heat Transfer Properties in Scramjet Engines

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