Performance evaluation of regenerative cooling/film cooling for hydrocarbon fueled scramjet engine

Zuo, Jingying; Zhang, Silong; Bao, Wen; Cui, Naigang

doi:10.1016/j.actaastro.2018.04.037

Cited by 38 publications

(8 citation statements)

References 37 publications

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“…The whole carburization and oxidation process of TiN coating is presented in Figure . During the hydrocarbon fuel cracking, the carbon atoms infiltrate into the interior of the coating; meanwhile, the metals diffuse from the matrix to the inside of the coating. , The coating is still able to maintain the star shape of the microstructures, but parts of N atoms are replaced by C atoms to form the solid solution of TiC x N y , as shown in eq .…”

Section: Resultsmentioning

confidence: 99%

“…Endothermic hydrocarbon fuels are adopted for the advanced aircraft because they provide power through combustion and achieve thermal management with the regenerative cooling method. − To achieve enough cooling ability, the fuel will be heated to high temperatures to get the chemical heat sink through the pyrolysis reaction. At the same time, solid pyrolytic carbon deposition will form on the inner surface of the micro-cooling channels, which may lead to the obstruction in channel and even affect the flight of the aircraft. − Meanwhile, the carbon infiltrating the inside of the material causes severe coke formation and reduces the surface mechanical properties and corrosion resistance of the material. − Therefore, it is of great significance to explore the carburization.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Carburization during the Repeated Coking and Decoking Process

Wang

Gong

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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In this work, stainless steel blank tube and TiN-coated tube obtained by atmospheric-pressure chemical vapor deposition were used to explore the carburization during the repeated coking and decoking process. Various analytical techniques including scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy were applied to analyze the morphology, composition, and type of coke. To protect the pipeline, the on-line decoking method was used to determine the amount of coke. During the coking experiment, it was observed that carburization and metal outdiffusion occurred on the inner surface of the microchannel by scanning the cross section of reaction sheets. Moreover, the coke mass of the blank tube in the next coking experiment increased evidently after the previous coking and decoking cycle. However, under the same experimental condition, TiN coatings transforming into TiO2–TiC x N y –TiN multilayer films could still maintain anticoking performance because it alleviated the carburization and metal outdiffusion.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation on Carburization during the Repeated Coking and Decoking Process

Wang

Gong

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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“…For a design with a basic scenario, the technical merit of a subsystem should base on that of the scenario, as shown in (12).…”

Section: B Technical Meritmentioning

confidence: 99%

“…It is related to the thermal cycle of engine and flight conditions of vehicle. However, the high-speed internal flow proposes problems in unstart of inlet [8]- [10], combustion stabilization [11], and thermal protection [12], [13]. Because of these problems, propulsive performance of HCV is difficult to realize and improve [14].…”

mentioning

confidence: 99%

Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle

et al. 2019

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In the design of hypersonic cruise vehicles, great effort is demanded to improve the performances of subsystems, namely structure, aerodynamics, and propulsion. Herein, effort demanded to realize a subsystem performance is quantified by technical merit. To achieve a feasible design, excessive technical merit of any one subsystem should be avoided. Accordingly, a lowest-technical-merit (LTM) design methodology has been proposed in this work. By this methodology, the design problem could be interpreted into a parametric optimization. The solution to such an optimization corresponds to the highest feasibility. The methodology has been implemented on two cases: deriving a hydrocarbon-fueled long-range cruiser from Boeing X-51A, and a hydrogen-fueled LAPCAT scenario from PREPHA. The simulation results show that LTM could achieve optimal allocations while satisfying different payload/range performances. The design methodology could help to improve the feasibility of hypersonic cruise vehicles. Furthermore, it could also be used in the design of other systems.

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“…8 The regenerative cooling/film cooling method for hydrocarbon-fueled scramjet engine was proposed in our previous study. 9 The method uses the high-temperature gaseous hydrocarbon fuel which has finished its job to regeneratively cool the engine wall as supersonic film coolant, particularly, non-equilibrium chemical reaction will occur in the mixing process between the high-temperature hydrocarbon-fueled film coolant and the high-enthalpy mainstream in the combustor.…”

Section: Introductionmentioning

confidence: 99%

Interaction mechanism between shock waves and supersonic film cooling with cracking reaction

Zuo

Zhang

Qin

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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In order to understand the interaction mechanism between shock waves and supersonic film cooling with cracking reaction, supersonic film cooling using gaseous hydrocarbon fuel as coolant in terms of cracking reaction of the coolant, with and without shock waves interaction, is investigated numerically. Theoretically, cracking reaction may be accelerated by the shock wave interaction, which may enhance the mixing of the coolant and absorb heat, which will lead to contradictory effects on supersonic film cooling. However, it turns out that, with shock waves interaction, cracking reaction only absorbs more heat but barely has any effect on the mixing either locally or further downstream due to the momentum change caused by the reaction is extremely small and the energy change plays the dominate role. It is worth mentioning that oblique shock wave causes energy accumulation in the shock wave interaction region, which deteriorates supersonic film cooling. However, with the cracking reaction considered, the negative effect brings by the oblique shock wave is weakened by the cracking reaction due to the increment of chemical heat absorption caused by the energy change. It is found that the absolute temperature in the shock wave interaction and the relative temperature increment caused by the shock wave interaction to be the decisive factors of the chemical heat absorption increment, especially for high absolute temperature or relative temperature increments, and the effect of the local reactant concentration plays the dominant role. Furthermore, the extent of weakened chemical reaction on the negative effect due to the oblique shock wave depends not only on the chemical heat absorption but also on the local absolute temperature.

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Performance evaluation of regenerative cooling/film cooling for hydrocarbon fueled scramjet engine

Cited by 38 publications

References 37 publications

Investigation on Carburization during the Repeated Coking and Decoking Process

Investigation on Carburization during the Repeated Coking and Decoking Process

Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle

Interaction mechanism between shock waves and supersonic film cooling with cracking reaction

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