【摘要】 该文研究了由聚芳脂纤维(vectran)平纹织物为承力层、PVF膜(tedlar)为阻氦层、聚酯薄膜(mylar)为防护层的浮空器蒙皮材料氦气渗透的细观机制。首先,根据Hagen-Poiseuille定律,推导得到了承力层等效渗透率。然后,通过氦气溶解扩散模型和多层复合结构渗透模型,理论分析了各层对氦气密封性能的贡献比例,讨论了每层不同厚度对整体蒙皮材料氦气渗透率的影响,理论预测了蒙皮材料的整体氦气渗透率。最后,将实验结果与理论所得的数值进行了对比,验证了多层渗透模型的正确性。更多还原

【Abstract】 The helium permeation mechanism through a thin film fabric laminated envelope material was studied for consisting of a plain fabric polyarylate fiber(vectran) for the main structural layer,a protective layer PVF film(tedlar) and a helium barrier layer polyester film(mylar).The equivalent permeability of vectran layer was calculated based on the Hagen-Poiseuille law.Then,the solution-diffusion model and the multilayer permeation model were used to predict the contribution of each layer and the layer thickness on the helium permeability of the overall envelope.The predicted helium permeation rates are then shown to compare well with experimental data.更多还原