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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Investigation of Effects of Scale and Surface Roughness on Efficiency of Water Jet Pumps Using CFD
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Investigation of Effects of Scale and Surface Roughness on Efficiency of Water Jet Pumps Using CFD

机译：使用CFD研究水垢和表面粗糙度对喷水泵效率的影响

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Abstract:Comparing to pumps with moving parts water-jet pumps have a lower efficiency and surface roughness is an important factor for these types of pumps. The aim of this simulation study is to numerically determine how the scaling-up, downscaling and change in the absolute and relative roughness would impact on the energy efficiency of the pumps, using a commercial computational fluid dynamics (CFD) solver ANSYS FLUENT. In order to select the turbulence model that produces the predictions closest to the actual data from four turbulence models, a preliminary study was conducted on a full-scale jet pump. Using the transition SST model, which gives the best results among all the models, the effects of scale and roughness on the performance of the pumps were investigated in the scale range from 1/4 to 20/1. The optimum efficiencies for different area ratios over a wide range were determined according to the scale and size of roughness. It was seen that the efficiency increases significantly up to a given s...
机译：摘要：与具有运动部件的泵相比，喷水泵的效率较低，表面粗糙度是此类泵的重要因素。本模拟研究的目的是使用商用计算流体动力学（CFD）求解器ANSYS FLUENT，通过数值确定绝对和相对粗糙度的按比例放大，缩小和相对变化将如何影响泵的能源效率。为了从四个湍流模型中选择产生最接近实际数据的预测的湍流模型，对全尺寸射流泵进行了初步研究。使用过渡SST模型，该模型在所有模型中均能提供最佳结果，研究了水垢和粗糙度对泵性能的影响，比例范围为1/4至20/1。根据粗糙度的大小和大小，确定了宽范围内不同面积比的最佳效率。可以看出，在给定的时间内，效率显着提高。

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