The transport of multiphase flows of slurry (fluid-solid) through pipelines is usually encountered through several hurdles in various industries such as cement, textile and chemical industries. The flow parameters such as solids concentration, pipe directions and so on, add to these complexities and concepts associated with transport of slurries seems to be uncertain which has resulted in significant research being conducted on flow of slurries through pipelines. The investigation has been carried out in Textile and garment factory at Ethiopia in eastern Africa. The objective of the investigation is to study the effects of transporting of fluid-solid mixture (air-cotton ball) through horizontal, vertical and inclined pipelines in a textile factory. For this purpose one generalized mathematical model developed by Shrivastava and Kar (SK Model) was applied to predict more accurate results of pressure drop. The results of pressure drop obtained using SK model were compared with experimental results. The results showed that the percentage of head losses is increased in the smaller diameter pipe line about 48% and 67% with air velocity 12 m/s and 24 m/s respectively as compared to that of larger diameter pipeline. In the proposed pipeline system, it was observed that the energy saving can be achieved about 65% and 77% with air velocity 12 m/s and 24 m/s respectively.

中文翻译：

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纺织工业气动系统对流固混合流影响的实验研究

在水泥、纺织和化学工业等各个行业中，通过管道输送泥浆（流体-固体）的多相流通常会遇到几个障碍。固体浓度、管道方向等流动参数增加了这些复杂性，并且与泥浆运输相关的概念似乎是不确定的，这导致对通过管道的泥浆流动进行了大量研究。调查是在东非埃塞俄比亚的纺织服装厂进行的。调查的目的是研究在纺织厂中通过水平、垂直和倾斜管道输送流固混合物（空气棉球）的影响。为此，应用了由 Shrivastava 和 Kar 开发的广义数学模型（SK 模型）来预测更准确的压降结果。将使用SK模型获得的压降结果与实验结果进行了比较。结果表明，与较大直径管道相比，在空气流速为12 m/s和24 m/s的情况下，较小直径管道的水头损失百分比分别增加了约48%和67%。在所提出的管道系统中，观察到在空气速度分别为 12 m/s 和 24 m/s 时，可以实现约 65% 和 77% 的节能。结果表明，与较大直径管道相比，在空气流速为12 m/s和24 m/s的情况下，较小直径管道的水头损失百分比分别增加了约48%和67%。在所提出的管道系统中，观察到在空气速度分别为 12 m/s 和 24 m/s 时，可以实现约 65% 和 77% 的节能。结果表明，与较大直径管道相比，在空气流速为12 m/s和24 m/s的情况下，较小直径管道的水头损失百分比分别增加了约48%和67%。在所提出的管道系统中，观察到在空气速度分别为 12 m/s 和 24 m/s 时，可以实现约 65% 和 77% 的节能。