Optimized Design of Multilayer Thermal Insulations for Hypersonic Vehicles

Wang, Guang Hai; Zhang, Feng; Sun, Xian Kai; Sun, Hao; Huo, Yan Li; Zhang, Shi Chao; Chen, Yu Feng

doi:10.4028/www.scientific.net/kem.697.449

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…With the increase of the speed of vehicle [1,2], the thermal protection system of its powerplant requires higher insulation materials [3]. Some high-speed aircraft flying in a relatively short time (in seconds) and the service time of the insulation system is relatively short (about 600-1500s) [4,5].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Phase Change Thermal Insulation Materials

Zhang

Chen

et al. 2018

SSP

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With the increase of the speed of vehicle, the thermal protection system of its powerplant requires higher insulation materials. Phase change materials can absorb large amounts of heat in short time. So the introduction of phase change materials in thermal insulation materials can achieve efficient insulation in a limited space for a short time. In this paper, a new phase change thermal insulation material was prepared by pressure molding with microporous calcium silicate as matrix and Li2CO3 as phase change material. The morphology stability, exudation and heat insulation of the materials were tested. The results show that the porous structure of microporous calcium silicate has a good encapsulation when the phase transition of Li2CO3 is changed into liquid. And the material has no leakage during use. The thermal performance test also shows that the insulation performance of the material has obvious advantages in the short term application.

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Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Phase Change Thermal Insulation Materials

Zhang

Chen

et al. 2018

SSP

Self Cite

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Evaluation and Simulation Verification of Thermal Insulation Property of Fiber Fabric Materials in Space Environment

Cai-Yun¹,

Li-ping²,

Ye³

et al. 2019

Journal of Inorganic Materials

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Equivalent experimental conditions to those in space were used to characterize the effective thermal conductivity of the fiber fabric insulation used in the multilayer insulation system of the material preparation furnace loaded on Tiangong-2 Space Station. By evaluating the material following variations in the on-orbit temperature and on-track pressure, the microscopic heat transfer mechanism was studied. The furnace internal temperature field under different working conditions was also simulated according to the characterization results, and the data reliability was verified. The results showed that the effective thermal conductivity of the fiber fabric increases non-linearly with rising temperature; moreover, with lower pressures, the growth trends are gentler. With a pressure drop, the results present the trend of a decaying exponential function with a critical pressure value. Radiation and gas phase heat conduction are the main factors affecting the heat transfer of the fiber fabric under the microgravity environment. Simulation results of the temperature field demonstrate that the temperature field distribution trend matches well with that of the measured results. The maximum calculation error of the furnace center is 1.3% of the measured temperature. This method can be used to evaluate the thermal insulation performance of the multilayer fiber material close to the practical working conditions more reasonably, and also to improve the accuracy of thermal simulation prediction models.

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Optimized Design of Multilayer Thermal Insulations for Hypersonic Vehicles

Cited by 2 publications

References 5 publications

Preparation and Properties of Phase Change Thermal Insulation Materials

Preparation and Properties of Phase Change Thermal Insulation Materials

Evaluation and Simulation Verification of Thermal Insulation Property of Fiber Fabric Materials in Space Environment

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