An LDA study of the radial discharge velocities generated by a Rushton turbine : Newtonian fluids, Re ≥ 5
An LDA study of the radial discharge velocities generated by a Rushton turbine : Newtonian fluids, Re ≥ 5
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Rushton 涡轮机产生的径向排出速度的 LDA 研究：牛顿流体，Re ≥ 5
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
A. Nienow
中科院分区：
文献类型：
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作者：
K. Dyster;E. Koutsakos;Z. Jaworski;A. Nienow
本文报道了对Rushton涡轮机叶轮径向排气流动的LDA研究。平均值和均方根值获得了中心线和外速度分布，并从后者计算了流动数（F1）。此外，叶轮功率数（Po）已被测量。使用粘度为1000 mPas的透明牛顿流体，其雷诺数（Re）为5≤Re≤ 105 × 104。当Re> 1000时，结果与文献中报道的在水中（Re> 1004）测量的结果相似，F1 = 0.78。对于Re<500，平均值和r.m.s.当Re<0.20时，F1为∞Re，而Po为∞Re-1。这些结果有助于理解粘性对搅拌容器中流动的影响，并为粘性非牛顿流体中此类流动的比较研究提供了良好的基线
LDA studies are reported on the radial discharge flows from a Rushton turbine impeller. Mean and r.m.s. centre line and outled velocity profiles were obtained and, from the latter, flow numbers (F1) were calculated. In addition, impeller power numbers (Po) have been measured. Transparent Newtonian fluids of viscosity to 1000 mPas were using giving Reynolds number (Re) from 5≤Re≤∼5×10 4 . For Re>∼500, the results were similar to those reported in the literature for measurements made in water (Re>∼10 4 ) with F1≃0.78. For Re<∼500, the mean and r.m.s. values fell as well as F1 and for Re<∼20, F1∞Re whilst Po∞Re -1 . The results help the understanding of the effect of viscosity on flow in a stirred vessel and provide a good baseline for comparative studies of such flows in viscous non-Newtonian fluids