Thermo-Fluidic Comparison between Sandwich Panels with Tetrahedral Lattice Cores Fabricated by Casting and Metal Sheet Folding

Zhang, Xiaoqing; Jin, Xin; Xie, Gongnan; Yan, Hongbin

doi:10.3390/en10070906

Cited by 31 publications

(11 citation statements)

References 27 publications

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“…Thus, there is a need of using models, which are simplification of the real objects without losing adequacy to reality. In the numerical analysis of layered materials [17][18][19] and constructions, made from such materials, it is useful to perform a process called homogenization [20,21]. As a consequence, instead of structure of layers made from different materials one can obtain one layer characterized by effective properties of the composite.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Openings

2020

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This paper presents mixed analytical/numerical method for estimating the static top-to-bottom compressive strength of corrugated packaging with different ventilation openings and holes, in which the torsional and shear stiffness of corrugated cardboard as well as the panel depth-to-width ratio are included. Analytical framework bases on Heimerls assumption with a modification to a critical force, which is here computed by a numerical algorithm. The proposed method is compared herein with the successful McKee formula and is verified with the large number of experiment results of various packaging designs made of different qualities of corrugated cardboard. The results show that, for various hole dimensions or location of openings in no-flap and flap boxes, the estimation error may be reduced up to three times than in the simple analytical approach.

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Section: Introductionmentioning

confidence: 99%

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Openings

2020

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“…For the fluid-solid coupling interface, a conservative interface flux condition is adopted for heat transfer by incorporating a general grid interface (GGI) mesh connection. Translational periodicity boundary condition with zero pressure drop is used on the periodic surfaces for both the solid domain and air domain 3,28 , with the other surfaces of the computational domain set to be adiabatic. Considering that the heat flux applied on the heating surface is not measured directly in the force convective experiment, its value is derived based on the measured heating temperature.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Gao 26,27 introduced a composite tetrahedral LFM and revealed the heat transfer mechanism by analysing the local thermal and fluid flow patterns. For a given porosity, Zhang 28 compared the thermal performance between square and circular cross-section tetrahedral lattice cores and determined that a 13% to 16% higher Nusselt number was achieved for square ligaments compared with circular ligaments, which was due to the complex flow mixing. In addition, the effect of porosity was studied by Karen 4 , and the results showed that the high Nusselt number increased as porosity decreased due to the increased surface area and flow mixing.…”

Section: Introductionmentioning

confidence: 99%

Comparison of convective heat transfer for Kagome and tetrahedral truss-cored lattice sandwich panels

Yang

Chao-zhen

Zhao

et al. 2019

Sci Rep

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The aim of this paper is to make a thorough comparison between Kagome and tetrahedral truss-cored lattices both experimentally and numerically. Two titanium sandwich panels –one cored with the Kagome lattice and the other with the tetrahedral lattice –are manufactured by 3D printing technology. Comparisons of the thermal insulation, the inner flow pattern and the heat transfer between the two sandwich panels are completed subsequently according to the results from forced convective experiments and numerical simulation. Within the Reynolds number range of interest for this study, the Kagome lattice exhibits excellent heat dissipation compared with the tetrahedral lattice. In particular, when the cooling air flows in the direction OB of the two sandwich panels, the Kagome lattice provides an 8~37% higher overall Nusselt number for the sandwich panel compared to the tetrahedral lattice. The superiority of the Kagome lattice comes from a unique configuration in which the centre vertex acting as the vortex generator not only disturbs the primary flow but also induces more serious flow stagnation and separation. The complex fluid flow behaviours enhance heat transfer on both the endwalls and the trusses while causing a pressure drop that is almost two times higher than that of the tetrahedral lattice in the flow direction OB.

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“…Yan et al [15] pointed out that the sandwich panels filled with X-type truss array and Kagome-type truss array have higher heat transfer performance. Zhang et al [16] stated that for the sandwich panels filled with tetrahedral truss structure, the heat transfer performance of the brazed sandwich panel and casted sandwich panel is nearly the same. The results reported by Jin et al [17] show that the X-type truss array structure has more advantages than the Pyramidal-type truss array structure in heat transfer capacity and comprehensive thermal performance.…”

Section: Introductionmentioning

confidence: 99%

Study on flow and heat transfer characteristics of cooling channel filled with x-shaped truss array

Gao

et al. 2023

THERM SCI

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In order to enhance the cooling performance of turbine blades, novel cooling channels filled with X-shaped truss array were investigated in this study. The flow mechanism and heat transfer characteristic of the cooling channel filled with X-shaped truss array were analyzed numerically. The empirical correlations of friction coefficient and Nusselt number related to the inlet Reynolds number (10,000 to 60,000) and truss rod inclination angle (30? to 45?) were fitted. The results show that the secondary flow vortex in the channel and the Nusselt number on the channel wall both show periodic distributions along the streamwise direction. The row-averaged Nusselt number and friction coefficient of the channel first decrease quickly and then decrease slowly along the streamwise direction. When truss rod inclination angle increases from 30? to 60?, the whole-averaged Nusselt number and the whole friction coefficient of the channel increase by 25.4% to 52.3% and 1.19 to 1.33 times respectively under different Reynolds number. The channel with truss rod inclination angle of 45? has the best comprehensive thermal performance. In all cases, the ratio of heat transfer quantity of the truss rod surface to the total heat transfer quantity of the channel ranges from 22.9% to 42.3%. The increase of Reynolds number improves the heat transfer quantity of the channel wall and the increase of truss rod inclination angle reduces the heat transfer quantity of the channel wall.

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Thermo-Fluidic Comparison between Sandwich Panels with Tetrahedral Lattice Cores Fabricated by Casting and Metal Sheet Folding

Cited by 31 publications

References 27 publications

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Openings

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Openings

Comparison of convective heat transfer for Kagome and tetrahedral truss-cored lattice sandwich panels

Study on flow and heat transfer characteristics of cooling channel filled with x-shaped truss array

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