Effects of cracking reaction on supersonic film cooling using gaseous hydrocarbon fuel as coolant

Zuo, Jingying; Zhang, Silong; Qin, Jiang; Bao, Wen; Cui, Naigang; Liu, Xiaoyong

doi:10.1016/j.applthermaleng.2020.115134

Cited by 22 publications

(3 citation statements)

References 34 publications

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“…[5][6][7][8] The heat sink capability of a hydrocarbon fuel can improve significantly if the fuel undergoes an endothermic cracking reaction before combustion. [9][10][11][12][13] Although cryogenic fuels, such as liquid CH 4 and H 2 , can provide adequate cooling, it requires ample space because of their low densities. Moreover, the cost of fuels, logistics, and safety can be the other issues.…”

Section: Introductionmentioning

confidence: 99%

“…Scientists have proposed the concept of “regenerative cooling” using liquid hydrocarbon fuel as one of the efficient cooling methods 5‐8 . The heat sink capability of a hydrocarbon fuel can improve significantly if the fuel undergoes an endothermic cracking reaction before combustion 9‐13 . Although cryogenic fuels, such as liquid CH 4 and H 2 , can provide adequate cooling, it requires ample space because of their low densities.…”

Section: Introductionmentioning

confidence: 99%

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Regenerative cooling capacity of hydrogenated carene under supercritical environment

Konda

Dinda

2022

Intl J of Energy Research

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Summary The thermal cracking characteristic of an in‐house prepared plant‐derived hydrogenated carene (H‐Carene) fuel is examined above its critical temperature and pressure. The experiments were performed for a wide range of temperatures between 450°C and 650°C at 40 bar pressure in a tubular flow reactor. At 650°C and 40 bar pressure, the conversion of the H‐Carene fuel is about 40%, and the estimated value of chemical heat sink capacity is 488 kJ/kg of fuel. The aptness of triethylamine (TEA) as an initiator to improve the heat sink capacity of the H‐Carene fuel is also examined. The investigation showed that the initiator improved the fuel conversion and endothermicity. The endothermic heat sink capacity of the H‐Carene increased by about 28% at 650°C with 5% (by weight) of TEA. It is noted that the sensitivity of temperature on the coke formation rate is higher than the initiator sensitivity for a similar range of the conversion change. The thermal cracking of H‐Carene follows a first‐order kinetic model, and the estimated value of the apparent activation energy of the H‐Carene cracking reaction is about 95 kJ/mol. The work shows that the heat sink capability of the plant‐derived H‐Carene fuel is comparable with JP‐7, a petroleum‐derived fuel. Novelty Statement The manuscript presented the cracking characteristics of hydrogenated carene under supercritical conditions emphasizing various features like detailed characterization, feed conversion, product distribution, cooling capacities, coke deposition rate, cracking kinetics, and so on. It also highlighted the suitability of an amine‐based initiator to enhance the endothermicity of the fuel. The study is unique and not found in any article which addressed the above aspects altogether.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regenerative cooling capacity of hydrogenated carene under supercritical environment

Konda

Dinda

2022

Intl J of Energy Research

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“…Meanwhile, Neel et al (1994) found that cooling effectiveness can be improved by increasing the injectant Mach number (without significant changes of mass flow rate). In most cases, tangential jet has higher cooling efficiency and longer cooling length (Zuo et al 2017). Opposing jet is a hot spot of research in recent years (Shen et al 2019), but it is mainly used for cooling at stagnation areas, and its corresponding cooling length is shorter compared with tangential cooling jet.…”

Section: Introductionmentioning

confidence: 99%

Effects of feeding pressures on the flowfield structures of three-dimensional film cooling

Zhao¹,

Yi²,

Mo³

et al. 2022

Fluid Dyn. Res.

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A Mach 2.6 annular supersonic nozzle was designed to protect a hypersonic cone. The annular nozzle is able produce tangential cooling film around the cone. Experiments were carried out in a hypersonic wind tunnel under different cooling film feeding pressures and different attack angles. Temperature-sensitive paint (TSP) was used to measure surface temperature of the cone body; schlieren method was applied to visualize the flow structures. TSP results showed that cooling film can obviously decrease surface heating load, but its efficiency was influenced by the angle of attack (AoA). Schlieren results showed that the shape of upper-lip shock wave is similar to an arc, and the reflected shock wave is more closer to a straight line; both the tilt rate of upper-lip shock wave and the reflected shock wave were increased exponentially with the rise of feeding pressure; a higher feeding pressure resulted in a larger curvature of upper-lip shock wave; compared with reflected shock wave, upper-lip shock wave and shearing layer were more easily affected by the feeding pressure. With higher feeding pressure, incidence point was moved to the further downstream location, and a fitting formula is given to express the relationship between the position of the shock wave incidence point and the feeding pressure.

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Evaluation Model for Fast Convective Heat Transfer Characteristics of Thermal Cracked Hydrocarbon Fuel Regenerative Cooling Channel in Hydrocarbon-Fueled Scramjet

Lin

2021

Applied Thermal Engineering

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Effects of cracking reaction on supersonic film cooling using gaseous hydrocarbon fuel as coolant

Cited by 22 publications

References 34 publications

Regenerative cooling capacity of hydrogenated carene under supercritical environment

Regenerative cooling capacity of hydrogenated carene under supercritical environment

Effects of feeding pressures on the flowfield structures of three-dimensional film cooling

Evaluation Model for Fast Convective Heat Transfer Characteristics of Thermal Cracked Hydrocarbon Fuel Regenerative Cooling Channel in Hydrocarbon-Fueled Scramjet

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