Study of Bonding Technology and Property of Foam-Sandwich Co-Bulkhead of Cryogenic Tank on Launch Vehicle

Li, Zhao Qian; Nan, Bo; He, Teng; Feng, Guan

doi:10.4028/www.scientific.net/msf.817.639

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Despite the fact that honeycomb sandwich has specific characteristics of high stiffness-to-weight ratio, the manufacturing process of the CBH of honeycomb sandwich remains challenging. 8 Finally, the foam core sandwich mode 9 is a sandwich structure filled with foam between two alloy panels of aluminum–lithium for thermal insulation. The foam has ultralow thermal conductivity and very low density and is also an isotropic material capable of undergoing large deformation.…”

Section: Introductionmentioning

confidence: 99%

Thermo-structural analysis of cryogenic tanks with common bulkhead configuration

Sumith

Kumar

2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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In launch vehicles, cryogenic propulsion stages store liquid oxygen (LOX) at 76 K and liquid hydrogen (LH2) at 20 K, generally in two separate insulated tanks connected through tubular truss components. Consequently, load transfer from the LH2 tank to the LOX tank is very much localized, resulting in a nonoptimal design. This article presents an alternative single tankage design using a common bulkhead (CBH) to enhance the payload capability, which enables maintaining LH2 temperature within a specified temperature when exposed to a temperature gradient. A sandwich insulator using aramid honeycomb embedded with polyimide foam keeps the LH2 temperature within 20 ± 1 K is proposed, based on transient heat transfer analysis for 1000 s. The foam-filled honeycomb core is treated as equivalent foam in the analysis as the thermal conductivity of the core and the foam is quite close. The efficacy of the insulator is established by an experiment to measure the back wall temperature when liquid nitrogen is loaded on the top skin of the panel, and the insulator maintains a temperature gradient of 123 K for 1000 s. A good agreement is obtained between the transient finite element analysis results with experimental data. An externally insulated LOX tank configuration with an optimum length of the skirt–cylinder where the temperature reaches 80 K is arrived at based on slosh, buckling, and thermal analyses. No thermal gradient is found across the thickness of the skirt, while the thermal gradient is observed along the length of the skirt as anticipated. An integrated thermo-structural analysis of the cryo-system is carried out considering temperature-dependent material properties. A positive margin for the skirt is obtained. A payload gain of 366 kg is estimated based on the present study for the new design option with a CBH and skirt as compared to the traditional tubular truss arrangements.

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Section: Introductionmentioning

confidence: 99%

Thermo-structural analysis of cryogenic tanks with common bulkhead configuration

Sumith

Kumar

2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…a =1120mm, 1 b =1589mm, 2 b =1069mm.Primary thermal and mechanical properties[5] for Al-LiMaterials Science Forum Vol. 975…”

mentioning

confidence: 99%

An Application of Reinforced Polyurethane Foam in Design of the Common Bulkhead for Cryogenic Tanks

Liu

et al. 2020

MSF

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By using the material of reinforced polyurethane (RPU) foam, the common bulkhead is devised for cryogenic tanks in this paper. Properties of RPU foam are obtained through experiments. Based on the properties, the structure is designed with the integration of special features including lightweight, easy to manufacture, load bearing and thermal insulation. Based on numerical simulation, thermal analysis, stability and thermal mechanical coupling behavior of the structure are analysed. The results show that the common bulkhead not only satisfies the heat insulation requirements of cryogenic tanks for liquid hydrogen and oxygen, but also keeps stability.

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Study of Bonding Technology and Property of Foam-Sandwich Co-Bulkhead of Cryogenic Tank on Launch Vehicle

Cited by 2 publications

References 6 publications

Thermo-structural analysis of cryogenic tanks with common bulkhead configuration

Thermo-structural analysis of cryogenic tanks with common bulkhead configuration

An Application of Reinforced Polyurethane Foam in Design of the Common Bulkhead for Cryogenic Tanks

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