RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2007, Vol. 16 >> Issue (1): 42-47.

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EXPERIMENTAL STUDY ON THE IMPACT PRESSURE OF SWIRLING WATER JETS

HU Heming, CHEN Yongcan, LI Ling, ZENG Chengjie   

  • Received:1900-01-01 Revised:1900-01-01 Online:2007-01-20

Abstract:

The impact pressure of swirling jets, produced by watercushion swirling abrasive jet nozzle, was measured by continuous shooting images of the symbol in the piezometer tubes. Based on computer image processing technology, the development of dynamic impact pressure under different inflow conditions was obtained automatically. It is shown that the flow rate ratio of tangential inflow to axial inflow and total flow rate were the control factors of the impact pressure, with the former determining the distribution and scale of the impact pressure, while the latter determining the scale only. Moreover, the influence of flow rate alteration of the tangential inflows from four directions upon the timeaveraged pressure was rather little, and the fluctuation of the dynamic pressure became small as the distance between the gaging point and jetcore increased.

Key words: swirling jet, impact pressure, measurement of pressure, watercushion swirling abrasive jet nozzle

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