High efficient configuration design and simulation of platelet heat exchanger in solar thermal thruster

Xing, Baoyu; Liu, Kun; Huang, Minchao; Cheng, Mengchun

doi:10.1007/s11630-014-0702-x

Cited by 11 publications

(4 citation statements)

References 7 publications

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“…The fin surfaces are secondary heat transfer surfaces, and are considered as thermal coupling boundaries. Gravity is not considered in the simulation 26 , 27 . The fin material is aluminum, the fluid is air, and the physical properties are shown in Table 3 .…”

Section: Modeling Methodologymentioning

confidence: 99%

Heat transfer and pressure drop characteristic research of sine wavy flying-wing fins

Miao,

Wan,

et al. 2023

Sci Rep

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In recent years, heat transfer enhancement of heat exchange equipment has attracted more and more attention. In this paper, the heat transfer and pressure drop characteristics of sine wavy flying-wing fins are studied by numerical method. The objective is to improve the integrated heat transfer and pressure drop performance of sine wavy flying-wing fins. The degrees of freedom of fin sizes include fin pitch to fin height ratio fp/fh, fin height to fin wavelength ratio fh/W, fin amplitude to fin pitch ratio 2A/fp and fin inclined angle α. The results show that among the calculated 17 flying-wing fins, the optimal values of fp/fh, fh/W, 2A/fp, and α are 0.5, 0.4, 1.9 and 70° respectively. The optimized SWFWF simulation model is established, and the average JF factor is 1.307, which is about 10.9% higher than that of Fin 05 (JF = 1.18). Multiple linear regression is used to obtain the correlations of flow and heat transfer characteristics of flying-wing fins. The average deviation of the correlations for j and f are 0.85% and 4.9% respectively. The correlations can be used for the design and optimization of sine wavy flying-wing fins.

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Section: Modeling Methodologymentioning

confidence: 99%

Heat transfer and pressure drop characteristic research of sine wavy flying-wing fins

Miao,

Wan,

et al. 2023

Sci Rep

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“…The dissociation species of ammonia are computed by finite-rate chemical reaction method. The 3D Navier-Stokes equation is adopted to solve the flow and heat transfer problem, and finite volume method is involved with second order upwind scheme [11].…”

Section: Computing Modelmentioning

confidence: 99%

Influence of Thermal Decomposition of Ammonia Propellant in Solar Thermal Propulsion

Xing

Huang

Cheng

et al. 2014

AMM

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Solar thermal propulsion is a kind of space propulsion technology with great potential applications. Due to the difficulty of hydrogen storage in orbit, ammonia becomes an ideal candidate propellant as its stability and easier storage. In solar thermal propulsion system, the working temperature is usually above 2300K, and in this condition the dissociation of ammonia will occur. Thus, using ammonia as a single component propellant to compute and analysis the performance of thruster is not precise, and the mixture components produced from ammonia dissociation must be taken into account. In this paper a novel heat exchanger configuration with platelet technology is designed, and based on finite-rate chemical reaction method and computational fluid dynamics, the dissociation process of ammonia in the heat exchanger and nozzle is simulated. Then the influence to the specific impulse of the solar thermal propulsion system is comparatively analyzed. The simulation result indicates that the main productions of the dissociation are N2and H2, and the mole fraction of other components is small value that can be neglected. The specific impulse considering dissociation reaction is higher than not considering, so that this research can estimate the performance of solar thermal propulsion with ammonia propellant more precisely.

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“…Xing B.Y. et al designed a multilayer platelets heat exchanger in STP system based on the transpiration cooling technology of platelet [18]. In their study, the number of platelets was 20 layers, the thickness of a single platelet was 1 mm, and the depth of the control channel was 0.1 mm, and the heat transfer area of the propellant between the platelets was about 5 ~10 times larger than that of the spiral channel under the same conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on Heat Exchange Structure Design and Propulsion Performance of Solar Thermal Thruster

Zhang

Huang

2022

International Journal of Aerospace Engineering

Self Cite

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This paper designed a platelet heat exchanger in the solar thermal thruster and analyzed the unsteady-state conjugate heat transfer characteristics between heat exchanger and propellant. The conjugate heat transfer (CHT) computational fluid dynamics (CFD) simulation of the 3D model of the platelet under steady-state conditions was carried out with different mass flow rates to find the empirical correlation between the average Nusselt number and the average Reynolds number. The unsteady-state 1D simplified model of the heat exchanger was established using a loose coupling algorithm based on quasi-steady flow domain and finally verified by experiments. The results show that the platelet structure could heat the working medium to more than 2380 K with the heat transfer efficiency of 87% and produce a peak thrust of 0.57 N and specific impulse of 2200 m/s; in steady state, the outlet temperature and heat transfer efficiency of the heat exchanger were stable at 1950 K and 69%. Moreover, 1D model could accurately reflect the real heat exchange situation to a certain extent, the simulation error was less than 5% compared with the 3D model, and the calculation time was greatly shortened, making it more convenient to adjust the heat exchange strategy. The experimental results were consistent with the simulation results at the initial stage of heat exchange, and the difference was mainly reflected in the steady-state stage, which might be caused by the lack of precision of the experimental equipment.

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High efficient configuration design and simulation of platelet heat exchanger in solar thermal thruster

Cited by 11 publications

References 7 publications

Heat transfer and pressure drop characteristic research of sine wavy flying-wing fins

Heat transfer and pressure drop characteristic research of sine wavy flying-wing fins

Influence of Thermal Decomposition of Ammonia Propellant in Solar Thermal Propulsion

Study on Heat Exchange Structure Design and Propulsion Performance of Solar Thermal Thruster

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