Dynamics of fabric and dryer sheet motion in domestic clothes dryers
Dynamics of fabric and dryer sheet motion in domestic clothes dryers
复制标题
家用干衣机中织物和烘干机片运动的动力学
DOI：
10.1080/07373937.2021.1918706
复制
发表时间：
2021
影响因子：
3.3
通讯作者：
Jones C
中科院分区：
文献类型：
--
作者：
Jones C
正电子发射粒子跟踪（PEPT）已被用于研究在家用干衣机中附着于织物和固体织物增强剂（SFE）递送制品（诸如干衣机片材）的放射性标记的示踪粒子的运动。这项工作检查了在干燥机内的运动动态范围内的操作条件。确定了干燥机滚筒内的六个区域，展示了物品在翻滚过程中所经历的运动范围。这些显示出明确的相关性与现有的流动状态描述的颗粒介质在旋转鼓的行为。织物运动主要是瀑布式的，以最大化织物的表面积，从而在下降区域中与干燥空气相互作用，其中某些条件朝向湍流或级联流移动。在轴向方向上的运动明显慢于主要径向流。干燥器片材比织物更容易起皱，与滚筒壁接触的时间很长。相反，羊毛烘干机球更有可能级联，花时间混合到织物床的顶部，形成在冲击和提升区域。该床层中的行为主要由与鼓壁的摩擦相互作用决定，其随后影响其余5个区域中的行为。当改变织物含水量和体积填充比时，观察到这种行为的最显著变化，其中湿织物和较小的负载尺寸都表现出更快的下降速度和在织物床上花费更多的时间。变化是最显着的提升，下降和分离区域，不同的加速度和剪切可能会影响织物磨损和超临界流体输送。
Positron emission particle tracking (PEPT) has been used to investigate the motion of radioactively labeled tracer particles attached to fabrics and solid fabric enhancer (SFE) delivery articles, such as dryer sheets, in the domestic clothes dryer. This work examines the dynamics of motion within the dryer across a range of operating conditions. Six regions within the dryer drum are identified, demonstrating the range of movements experienced by items during tumbling. These show clear correlation with existing flow regimes describing behavior of granular media in rotating drums. Fabric motion is primarily cataracting to maximize the surface area of fabric available to interact with drying air in the falling region, with some conditions moving toward centrifuging or cascading flows. Movement in the axial direction was significantly slower than the primary radial flow. Dryer sheets were more prone to centrifuging than fabrics, with significant time spent in contact with the drum wall. Conversely, a wool dryer ball was more likely to cascade, spending time mixed into the top of a fabric bed which forms in the impact and lifting regions. Behavior in this bed is primarily determined by frictional interactions with the drum wall, which subsequently affects behavior in the 5 remaining regions. The most significant changes to this behavior were observed when changing fabric moisture content and volumetric fill ratio, with wet fabrics and smaller load sizes both exhibiting faster falling speeds and spending more time in the fabric bed. The changes were most significant in the lifting, falling and detachment regions, with varying acceleration and shearing likely to influence both fabric wear and SFE delivery.
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DOI：
10.1063/1.5129251
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