Lately, electricity has become part of basic mankind needs, but due to the high rising price and environmental hazards of the known energy sources such as large hydropower, oil, and coal production. This situation has limited the access of electricity to some regions of the world, especially in Africa and Asia. The International Monetary Fund (IMF)¹ with its primary commodity price projections stated that after the minimal growth in 2018, the nominal price of Brent crude will increase to US$53.5/barrel by 2020. The World Bank has also anticipated that all three major benchmark oil prices, Brent, WTI, and Dubai, will continue to constantly increase after 2020 to reach US$70 per barrel in 2035 as shown in Figure 1.² Again, the literature^3–6 drew the attention of the world to the current state of depletion of the ozone layer and the unfriendliness of the oil and gas industry to aquatic organisms. This has shifted the attention of present-day scientists and engineers to find out cheaper and more environmentally friendly methods of generating electricity to mankind. The generation of electrical energy through small hydropower systems remains the best option in tapping energy from water bodies for rural and isolated communities. The cost involvement in setting up a hydropower system is high because of the hydraulic device used.

中文翻译：

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几何对涡轮泵性能和内部流动特性的影响：综述

最近，电力已成为人类基本需求的一部分，但是由于高昂的价格上涨和已知能源（例如大型水电，石油和煤炭生产）的环境危害。这种情况限制了世界某些地区的电力供应，特别是在非洲和亚洲。国际货币基金组织（IMF）¹的主要商品价格预测表明，在2018年出现最低增长之后，布伦特原油的名义价格到2020年将升至53.5美元/桶。世界银行还预计这三大主要基准如图1所示，布伦特，西德克萨斯中质油（WTI）和迪拜的石油价格将在2020年之后继续不断增长，到2035年达到每桶70美元。²同样，文献^3–6再次引起了世界的关注，关注的是臭氧层目前的枯竭状态以及石油和天然气行业对水生生物的不友好。这已经转移了当今科学家和工程师的注意力，以发现更廉价，更环保的人类发电方法。通过小型水力发电系统发电仍然是从农村和偏远社区汲取水体能源的最佳选择。由于使用了液压装置，因此建立水力发电系统的成本很高。