Thermal Modeling of NASA's Super Pressure Pumpkin Balloon

Garde, Gabriel

doi:10.2514/6.2007-2630

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…For a large near-space airship [1,2], the envelope material is not only directly affected by environmental temperature but also by local radiation, cloud reflection, internal and external heat transfer and convective heat transfer [3,4]. The temperature difference of near-space airship envelope material can reach more than 100K [5][6][7], such as the temperature difference between day and night near the installation of solar panels in the envelope. The change of buoyancy and envelope stress caused by temperature change will have a great influence on the normal operation of the near-space airship.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Analysis of Fluid–Solid–Thermal Unidirectional Coupling of Near-Space Airship

Tang

Xie²,

Wang

et al. 2022

Aerospace

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Based on the biaxial experiment data of the membrane material under hot and cold conditions, the mechanical properties calculation model of envelope material was established with consideration of the effects of varying stress ratios, stress magnitudes and temperatures on the mechanical properties of near-space airship material. Using the heat source model, Computational Fluid Dynamics (CFD) simulation, User-Defined Function (UDF), structural finite element analysis software and the user subroutine of an airship to define the behaviour of fabric material, the fluid–structure–thermal coupling model of airship envelopes was established. In addition, a near-space airship was selected as the research subject to calculate the diurnal temperature differences during the summer solstice and analyse the diurnal temperature distribution of the envelope. Under controlled environmental conditions, the deformation law of the near-space airship under the influence of fluid–structure–thermal coupling was calculated and summarised. The present fluid–solid–thermal coupling model takes into account the anisotropy of materials, temperature, stress magnitude, stress ratio and other influencing factors, which can more accurately reflect and predict the stress–strain distribution and the deformation law of near-space airships.

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