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Experimental investigation on the performance of improving jet pump cavitation with air suction

机译:吸力改善射流泵气蚀性能的实验研究

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摘要

In order to improve the jet pump cavitation, a new method of inhaling air into the low-pressure region was proposed, and its performance was investigated experimentally under different air suction quantity and cavitation levels. Test results show that the cavitation number increases with the air suction quantity increasing in a linear approximation fashion. Increasing air suction quantity corresponds to a sharp decrease in acoustic noise, especially for the severe cavitation. As the air suction quantity increases, the pressure fluctuation range and fluctuation variance both decrease in the downstream, which relieve the cavitation vibration damage and enhance the jet pump stability. In addition, the pressure loss ratio reduces by 0.95%-3.46% and the pressure ratio increases by 5.7%-18% due to the water-air cushion layer formed in the wall boundary. The marked effect on preventing cavitation damage and improving the pressure transmission performance of the jet pump proves that the new air suction method proposed is practical and effective. Therefore, it is believed that this study would lay an important foundation for the widespread application of jet pump in the future.
机译:为了改善喷射泵的气穴现象,提出了一种将空气吸入低压区域的新方法,并在不同的吸气量和气穴程度下对它的性能进行了实验研究。试验结果表明,空化数随着吸气量的增加而线性增加。吸气量的增加对应于声噪声的急剧降低,尤其是对于严重的气穴现象。随着吸气量的增加,下游的压力波动范围和波动方差均减小,从而减轻了气蚀振动的损害并增强了喷射泵的稳定性。另外,由于在壁边界中形成了水气垫层,压力损失率降低了0.95%-3.46%,压力比率提高了5.7%-18%。在防止气蚀损伤和改善喷射泵的压力传递性能方面的显着效果证明,提出的新的吸气方法是实用和有效的。因此,相信该研究将为将来喷射泵的广泛应用奠定重要的基础。

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  • 作者单位

    School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China,State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China,Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China;

    School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China,State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China,Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China;

    School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;

    School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;

    School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Jet pump; Cavitation; Air suction; Acoustic noise; Pressure fluctuation; Pressure loss;

    机译:喷射泵空化吸气噪音;压力波动;压力损失;

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