A numerical analysis of heat transfer in an evacuated flexible multilayer insulation material

Chen, Jinjing; Yu, Weidong

doi:10.1007/s10973-010-0683-2

Cited by 15 publications

(5 citation statements)

References 11 publications

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“…These default values are determined from the experiments for fundamental turbulent shear flows, including homogeneous shear flows and decaying isotropic grid turbulence. 3,10 Table 3 shows the values of the constants.…”

Section: Governing Equations and Turbulence Modelmentioning

confidence: 99%

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Numerical simulation of three-dimensional airflow in a novel dual-feed rotor spinning box

Akankwasa

Lin

Zhang

et al. 2016

Textile Research Journal

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In order to regulate turbulence strength and determine airflow characteristics in a new dual-feed rotor spinning unit, the internal flow field is investigated. A computational fluid dynamics technique is employed to numerically study the three-dimensional model of the internal airflow in the new design. The effects of air velocity variation on turbulence strength, negative pressure, Re, and wall pressure distribution are investigated based on simulation data and previous studies. The results show that the turbulence strength and Re increased with increase in inlet air velocity. Pressure profiles inside the rotor varied significantly with positive pressure observed at the channel exits. Minimal inlet velocity maintains the flow field in the rotor interior below 100 m/s, which gives the ideal turbulence required to minimize yarn quality deterioration. The dual-feed rotor spinning unit showed more orderly streamline patterns with fewer vortices compared to the conventional one. The numerical simulation can provide insights on airflow studies and some guidelines for future prototyping and experiments to further improve the new design.

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Section: Governing Equations and Turbulence Modelmentioning

confidence: 99%

“…To ensure better mesh quality, cell size and optimum cell size have to be controlled to suit standard requirements. 3,10…”

Section: Grid Generationmentioning

confidence: 99%

Numerical simulation of three-dimensional airflow in a novel dual-feed rotor spinning box

Akankwasa

Lin

Zhang

et al. 2016

Textile Research Journal

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“…To minimize the heat leakage into the tank, another insulation technique has been used by combining MLI and a vapor-cooled shield (VCS) [64,65]. Other types of multilayer insulation, such as flexible MLI for human protection in spacecrafts, polar environments or volcano explorations [66], or Integrated MLI (IMLI) [67] have also been developed. IMLI method uses discrete low-thermal conductivity polymer micro-molded spacers between radiation shields to better control the layer spacing and prevent MLI compression.…”

Section: Insulation Materialsmentioning

confidence: 99%

Cryogenic hydrogen fuel tanks for large hypersonic cruise vehicles

Sharifzadeh

Verstraete

Hendrick

2015

International Journal of Hydrogen Energy

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“…By adding a complementary layer of PTFE [3], the turnover temperature can be designed for operating at high temperature by variation of the heat flux.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Thermal Analysis of a Teflon Coated Plate

Haţiegan

Molnar

Trocaru

et al. 2016

International Conference KNOWLEDGE-BASED ORGANIZATION

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This paper presents thermal analysis with finite elements for a plate of steel covered on the surface with a thin layer of Teflon. There is the possibility of identification of that part responsible for beginning of the thermal degradation using the vibrational model. The thermal analysis with finite elements made with ANSYS program enables monitoring and determination of plate variation of temperature. This variation of temperature could cause significant changes in guided wave propagation.

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A numerical analysis of heat transfer in an evacuated flexible multilayer insulation material

Cited by 15 publications

References 11 publications

Numerical simulation of three-dimensional airflow in a novel dual-feed rotor spinning box

Numerical simulation of three-dimensional airflow in a novel dual-feed rotor spinning box

Cryogenic hydrogen fuel tanks for large hypersonic cruise vehicles

Modeling and Simulation of Thermal Analysis of a Teflon Coated Plate

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