Cooling performance optimization of supercritical hydrocarbon fuel via bi-directional flow pattern

Zhang, Chen; Gao, Hui; Zhao, Jiajun; Zhou, Jianjun; Wen, Dongsheng

doi:10.1016/j.applthermaleng.2022.118563

Cited by 13 publications

(3 citation statements)

References 46 publications

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“…In this study, three 2D numerical models which is shown in figure 1, are established to simulate the flow characteristic and heat transfer characteristic of EHF. According to the actual structure of the scramjet, the heating section length is set to be 1000 mm [9]. Two adiabatic sections with the length of 100 mm are established to ensure the flow of fluid in the cooling tube model fully developed and strengthen stability of simulation, respectively.…”

Section: Geometry Of Cooling Tubes and Boundary Conditions Of Modelmentioning

confidence: 99%

Numerical analysis of flow and heat transfer characteristics of supercritical endothermic hydrocarbon fuel in taper tube

Zhao,

Gao,

Zhang

et al. 2023

J. Phys.: Conf. Ser.

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To enhance the cooling performance of the scramjet regenerative cooling system, a novel taper tube is proposed. Under supercritical pressure, the flow characteristics and heat transfer characteristics of endothermic hydrocarbon fuel (EHF) in taper tube, narrow cylindrical tube, and wide cylindrical tube are numerical investigated and compared. The results of the investigation of flow and heat transfer processes in the above three tubes indicate that the taper tube effectively facilitates the pyrolysis of n-decane and the n-decane conversion is increased by 3.94%, compared with narrow cylindrical tube. Compared with wide cylindrical tube, the taper tube enhances cooling effect and the wall temperature near the outlet is reduced by 50.16 K. The taper tube contributes to the cooling structure optimization and promotion of regenerative cooling system performance.

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Section: Geometry Of Cooling Tubes and Boundary Conditions Of Modelmentioning

confidence: 99%

Numerical analysis of flow and heat transfer characteristics of supercritical endothermic hydrocarbon fuel in taper tube

Zhao,

Gao,

Zhang

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

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“…The fuel flows through the channels absorbing excess heat from combustion chambers and then enters the chamber to proceed with the combustion process [30]. Many works have been conducted to investigate the cooling performance of regenerative cooling using supercritical hydrocarbon fuel in terms of effects of nonuniform heat flux [30][31][32], flow pattern [33] and acceleration and buoyancy [34][35][36][37][38]. Liu et al [30] investigated the heat transfer performance and flow structure of supercritical In addition to fundamental research, many researchers also performed investigations of supercritical CO 2 applied in heat exchangers [19][20][21], heat sinks [21][22][23] and other industrial devices [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…The results revealed that the wall temperature distribution was sensitive to the heat flux distribution while the outlet temperature was not affected by nonuniform heat flux. Zhang et al [33] proposed a bi-directional flow pattern in order to optimize the cooling performance of supercritical hydrocarbon fuel. They compared the temperature distribution of the bi-directional flow pattern with that of the traditional co-directional flow pattern and found that the adoption of a bi-directional flow pattern can improve the cooling performance whilst maintaining simple structures.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Flow Structure Characteristics of Regenerative Cooling in a Rectangular Channel Using Supercritical CO2

Liu

et al. 2023

Aerospace

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At an extremely high Mach number, the regenerative cooling of traditional kerosene cannot meet the requirement of the heat sink caused by aerodynamic heating and internal combustion in a scramjet propulsion system. As a supplement of traditional regenerative cooling, supercritical CO2 is regarded as an effective coolant in severe heating environments due to its excellent properties of heat and mass transportation. In this paper, the heat transfer and flow structure characteristics of regenerative cooling in a rectangular channel using supercritical CO2 are analyzed numerically using a validated model. The effect of heat flux magnitude, nonuniform heat flux, acceleration and buoyancy and flow pattern are considered to reveal the regenerative cooling mechanism of supercritical CO2 in the engine condition of a scramjet. The results indicate that the heat transfer deterioration phenomenon becomes obvious in the cooling channel loaded with relatively high heat flux. Compared with the cooling channels loaded with increased heat flux distribution, the maximum temperature increased for the channel loaded with decreased heat flux distributions. When larger acceleration is applied, a relatively lower wall temperature distribution and higher heat transfer coefficients are obtained. The wall temperature distribution becomes more uniform and the high-temperature region is weakened when the coolants in adjacent channels are arranged as a reversed flow pattern. Overall, the paper provides some references for the utilization of supercritical CO2 in regenerative cooling at an extremely high Mach number in a scramjet.

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Numerical Simulation About Transient Performance of Regenerative Cooling System for Combustion Chamber

Zhang,

Gao,

Zhao

et al. 2024

Green Energy and Technology

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Cooling performance optimization of supercritical hydrocarbon fuel via bi-directional flow pattern

Cited by 13 publications

References 46 publications

Numerical analysis of flow and heat transfer characteristics of supercritical endothermic hydrocarbon fuel in taper tube

Numerical analysis of flow and heat transfer characteristics of supercritical endothermic hydrocarbon fuel in taper tube

Heat Transfer and Flow Structure Characteristics of Regenerative Cooling in a Rectangular Channel Using Supercritical CO2

Numerical Simulation About Transient Performance of Regenerative Cooling System for Combustion Chamber

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