Numerical investigation on flow and heat transfer characteristics of supercritical RP-3 in inclined pipe

Tao, Zhi; Li, Liangwei; Zhu, Jianqin; Hu, Xizhuo; Wang, Longyun; Qiu, Lu

doi:10.1016/j.cja.2019.05.007

Cited by 13 publications

(3 citation statements)

References 25 publications

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“…According to the existing literature, SUPERTRAPP, Aspen HYSYS, Aspen Plus and REFPROP, developed by the National Institute of Standards and Technology (NIST) (NIST, 1999), are always used to achieve the properties of aviation kerosene (Yang et al , 2020; Li et al , 2018; Bao et al , 2012; Jiao et al , 2020). The properties are also obtained by in-house codes based on extended corresponding state principles, which are always incorporated into the commercial softwares (Ruan et al , 2014; Tao et al , 2019; Wang et al , 2010). Besides, the Chemkin files (CHEMKIN-PRO 15092, 2009) can be imported into the ANSYS FLUENT to build the reaction model (Zhou et al , 2017).…”

Section: Introductionmentioning

confidence: 99%

Research status of supercritical aviation kerosene and a convection heat transfer considering thermal pyrolysis

Zhang

Xie

et al. 2022

HFF

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Purpose This paper aims to comprehensively clarify the research status of thermal transport of supercritical aviation kerosene, with particular interests in the effect of cracking on heat transfer. Design/methodology/approach A brief review of current research on supercritical aviation kerosene is presented in views of the surrogate model of hydrocarbon fuels, chemical cracking mechanism of hydrocarbon fuels, thermo-physical properties of hydrocarbon fuels, turbulence models, flow characteristics and thermal performances, which indicates that more efforts need to be directed into these topics. Therefore, supercritical thermal transport of n-decane is then computationally investigated in the condition of thermal pyrolysis, while the ASPEN HYSYS gives the properties of n-decane and pyrolysis products. In addition, the one-step chemical cracking mechanism and SST k-ω turbulence model are applied with relatively high precision. Findings The existing surrogate models of aviation kerosene are limited to a specific scope of application and their thermo-physical properties deviate from the experimental data. The turbulence models used to implement numerical simulation should be studied to further improve the prediction accuracy. The thermal-induced acceleration is driven by the drastic density change, which is caused by the production of small molecules. The wall temperature of the combustion chamber can be effectively reduced by this behavior, i.e. the phenomenon of heat transfer deterioration can be attenuated or suppressed by thermal pyrolysis. Originality/value The issues in numerical studies of supercritical aviation kerosene are clearly revealed, and the conjugation mechanism between thermal pyrolysis and convective heat transfer is initially presented.

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Section: Introductionmentioning

confidence: 99%

Research status of supercritical aviation kerosene and a convection heat transfer considering thermal pyrolysis

Zhang

Xie

et al. 2022

HFF

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“…Numerous experimental and computational studies have been carried out to explore the thermal performance of aviation kerosene in the regenerative cooling process, wherein a large proportion of the numerical focused on the influence of the geometric size, the buoyancy effect, or the coupled effect of several factors on the heat and mass transfer of supercritical kerosene. − For instance, Zhu et al numerically investigated the effect of the vertical tube diameter on heat transfer deterioration of buoyancy under supercritical pressure; the results argued that heat transfer deterioration was aggravated with a smaller diameter such as when the diameter of the tube was below 10 mm . Wang et al focused on the non-uniform heat transfer deterioration of RP-3 and found that the abnormal stratification caused by buoyancy triggered non-uniform heat transfer deterioration, which can be weakened by decreasing the outer-wall heat flux, increasing the pressure, and increasing the mass flux .…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Thermal Behavior of Cracked RP-3 in Rectangular Cooling Channels under Different Inclinations

Jiang

et al. 2022

ACS Omega

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The pyrolysis effect of aviation kerosene is common in the regenerative cooling process of hypersonic aircraft scramjets. To find out the effect of inclination variation on the characteristics of aviation kerosene RP-3 considering thermal cracking in a regenerative cooling rectangular channel, a detailed chemical mechanism of RP-3 pyrolysis is introduced to construct a numerical model. The results indicate that the pyrolytic reaction begins at the junction of the heating wall and the side walls, and the main products of pyrolysis are light olefins and alkanes. The thermal cracking reaction slows down the velocity of the main flow on account of the increased density and increased viscosity resulting from the decrease in RP-3 temperature. With the decrease in inclination, thermal cracking is enhanced and the average heat transfer coefficient is decreased, which leads to an increase in wall temperature.

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“…Aviation kerosene often serves as a coolant in regenerative cooling systems before it is sent to the combustion chamber. − For scramjet applications, the pressures in the cooling channel generally range from 3 to 7 MPa, which are above the thermodynamic critical pressures of most aviation kerosene . In the high-pressure region, the thermophysical properties of aviation kerosene are quite different from those at normal temperatures and pressures. , Accurately evaluating the thermophysical properties of aviation kerosene at supercritical pressures is of great importance and a prerequisite for further analysis of kerosene-related heat transfer processes and development of thermal management techniques in aircraft engines.…”

Section: Introductionmentioning

confidence: 99%

C4+ Surrogate Models for Thermophysical Properties of Aviation Kerosene RP-3 at Supercritical Pressures

2021

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Due to the complexity of the chemical compositions in aviation kerosene, simplified surrogate models have gained significant attention to effectively reproduce the thermophysical properties of aviation kerosene. The available surrogate models usually adopt uniform representative compositions with a fixed ratio. However, given that aviation kerosene is an extremely complex mixture and associated with physicochemical reactions in actual heating processes, such simple models generally cannot accurately reproduce the thermophysical properties of aviation kerosene in a wide range of temperatures and pressures. Therefore, this work aims to develop accurate and independent surrogate models named C4+ for various thermophysical properties of aviation kerosene RP-3 at supercritical pressures. The thermophysical properties include density, viscosity, constant-pressure heat capacity, and thermal conductivity. The C4+ surrogate models are determined by using a carefully designed genetic algorithm to minimize the relative deviations between the calculated and experimental data of the corresponding properties based on the previous C4 surrogate model. Especially, the effects of pyrolysis and autoxidation reactions have been equivalently introduced to the corrections of the surrogate models. Consequently, the prediction of our surrogate models shows overall good agreement with the experimental measurements and the highest accuracy among all simplified surrogate models so far.

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Numerical investigation on flow and heat transfer characteristics of supercritical RP-3 in inclined pipe

Cited by 13 publications

References 25 publications

Research status of supercritical aviation kerosene and a convection heat transfer considering thermal pyrolysis

Research status of supercritical aviation kerosene and a convection heat transfer considering thermal pyrolysis

Numerical Investigation of the Thermal Behavior of Cracked RP-3 in Rectangular Cooling Channels under Different Inclinations

C4+ Surrogate Models for Thermophysical Properties of Aviation Kerosene RP-3 at Supercritical Pressures

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