水平管中冰浆湍流充分发展段位置的实验和模拟研究
Experiment and simulation research on fully developed turbulence Length of ice slurry on horizontal pipes
流动稳定段的确定对于冰浆的压降的计量非常重要,本研究在现有冰浆流变特性研究的基础上,引入冰浆浓度分布以更精确的预测粘度,对冰浆在8mm管径的圆管中在不同的入口流速下流动的压降特性开展模拟和实验研究。数值模拟和实验研究结果一致性较好。在7%的含冰率下,随着入口段长度的增加,流动压降幅度先降低,到一定入口段长度时压降降幅趋稳,最终得到实验选用的圆管其湍流充分发展段起始于160倍和180倍管径之间。对于7%和10.5%的含冰率,入口段压降随含冰率的增加而增大。
eremination of flow stable section is quite important in pressure drop measrurement of ice slurry. Based on studies of the existing ice slurry rheological properties, this paper use ice slurry concentration distribution for a more accurate prediction of viscosity, and conducted simulation and experimental research on the pressure drop characteristics of ice slurry flow in a 8 mm diameter circular tube under different inlet velocity. Numerical simulation and experiment results are in good consistency. Under the Ice Packing Factor (IPF) of 7%, ice slurry flow pressure drop amplitude reduces with the increase of entrance section length until a certain entrance length. The fully developed turbulence section begins in 160 times and 180 times of the tube diameter for the chosen circular tube. For the ice slurry with Ice Packing Factor (IPF) of 7% and 10.5%, the pressure drop of the entrance section increases with the increase of IPF.
赵小志、高留花、赵军、安青松
制冷工程
冰浆湍流充分发展段入口段压降
ice slurryfully development turbulence sectionentrance sectionpressrue drop
赵小志,高留花,赵军,安青松.水平管中冰浆湍流充分发展段位置的实验和模拟研究[EB/OL].(2015-11-27)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201511-673.点此复制
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