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首页> 外文期刊>Thermal engineering >Analysis of the Effect of Hydrophobic Properties of Surfaces in the Flow Part of Centrifugal Pumps on Their Operational Performance
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Analysis of the Effect of Hydrophobic Properties of Surfaces in the Flow Part of Centrifugal Pumps on Their Operational Performance

机译：离心泵流动部分表面疏水特性对其运行性能的影响分析

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摘要

The results of experimental studies focused on evaluating the effect of different conditions of wetting of functional surfaces in flow parts of centrifugal pumps (specifically, impellers) used in heat- and water-supply systems on their operational performance are presented. The conditions of interaction of the pumped medium with the impeller surfaces were altered through hydrophobization of functional surfaces that was implemented using the techniques developed at the Moscow Power Engineering Institute and the Brno University of Technology. It is demonstrated that this hydrophobization produced a considerable positive effect and raised the efficiency of pump units based on centrifugal KM pumps of three different form factors produced by ZAO Pompa (Shchelkovo) and a K centrifugal pump produced by Sigma. The efficiency was increased by 2-6% depending on the pump model. The results of experimental studies of the effect of hydrophobization of the surface of a canonical plate-type domain with a working medium flowing longitudinally along it in a hydrodynamic bed (Moscow Power Engineering Institute) are detailed. Two flat plates with a length of 250 mm and a width of 252 mm were studied. The surfaces of these plates had different roughness values, since one of the plates was polished prior to hydrophobization. Different wetting conditions, which were monitored by measuring the contact angle with a KRUSS MobileDrop goniometer, were established after hydrophobization. The obtained experimental data showed that the surface friction of the modified plate with a higher initial roughness (unpolished plate) was reduced by as much as 23%. This result agrees completely with the Cassie hypothesis.
机译：实验研究的结果集中在评估供热和供水系统中使用的离心泵（特别是叶轮）的流动部件中功能表面的不同润湿条件对其运行性能的影响。通过使用莫斯科动力工程学院和布尔诺工业大学开发的技术对功能性表面进行疏水化处理，可以改变泵送介质与叶轮表面相互作用的条件。结果表明，这种疏水作用产生了相当大的积极效果，并提高了泵的效率，该泵基于ZAO Pompa（Shchelkovo）生产的三种不同形状因子的离心KM泵和Sigma生产的K离心泵。根据泵的型号，效率提高了2-6％。详细研究了在水动力床（莫斯科动力工程学院）中工作介质沿其纵向流动的规范板型区域表面疏水化效果的实验研究结果。研究了两个长度为250 mm，宽度为252 mm的平板。这些板的表面具有不同的粗糙度值，因为其中一块板在疏水化之前已被抛光。疏水化后，建立了不同的润湿条件，通过使用KRUSS MobileDrop测角仪测量接触角来监测。获得的实验数据表明，具有较高初始粗糙度的改性板（未抛光板）的表面摩擦降低了多达23％。这个结果与卡西假设完全吻合。

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  • 来源
    《Thermal engineering》 |2015年第11期|817-824|共8页
  • 作者

    A. V. Volkov; A. G. Parygin; M. V. Lukin; A. V. Ryzhenkov; G. P. Khovanov; A. V. Naumov; J. Soukal; F. Pochyly; S. Fialova;

  • 作者单位

    Moscow Power Engineering Institute (National Research University), Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Moscow Power Engineering Institute (National Research University), Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Moscow Power Engineering Institute (National Research University), Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Moscow Power Engineering Institute (National Research University), Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Moscow Power Engineering Institute (National Research University), Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Moscow Power Engineering Institute (National Research University), Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Sigma, Jana Sigmunda 190, Lutin, 78349 Czech Republic;

    Brno University of Technology, Brno, Antonnska 548/1, 60190 Czech Republic;

    Brno University of Technology, Brno, Antonnska 548/1, 60190 Czech Republic;

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  • 正文语种 eng
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  • 关键词

    water-supply systems; centrifugal pumps; power costs; "lotus" effect; surface relief; hydrophobic-ity; energy efficiency; resource conservation; smart systems;

    机译：供水系统;离心泵;电力成本;“莲花”效应;表面浮雕;疏水性能源效率;资源节约;智能系统;

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