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Determining Effective Thermal Conductivity of Multilayered Nonwoven Fabrics

机译:确定多层无纺布的有效导热系数

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The average effective thermal conductivity K_(eff) is measured for forty-eight multilayered needle-punched nonwoven samples. Samples are produced using glass and ceramic fibers layered in several different constructions and punched with needles with varying numbers of barbs. The thermal conductivities are determined at steady state, using a Holometrix guard hot plate at an average applied temperature of 455℃. Statistical results show an ability to predict effective thermal conductivity with greater than 88% accuracy. Important parameters of the model include fabric weight, thickness, porosity, and structure, along with the applied temperature. Results also show that the nine-barbed structure with the highest ceramic content has the greatest potential for thermal insulation at elevated temperatures.
机译:测量了四十八个多层针刺无纺布样品的平均有效导热系数K_(eff)。样品是使用玻璃纤维和陶瓷纤维制成的,这些玻璃纤维和陶瓷纤维以几种不同的结构分层,并用带有不同数量倒钩的针打孔。使用Holometrix保护热板在平均施加温度455℃的条件下确定稳态下的热导率。统计结果表明,能够以超过88%的准确度预测有效导热率。该模型的重要参数包括织物重量,厚度,孔隙率和结构以及所施加的温度。结果还表明,具有最高陶瓷含量的九刺结构在高温下具有最大的隔热潜力。

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