CONSIDERATIONS OF A TWO-PHASE FLOW DIFFUSER DURING SELF-FLASHING PHENOMENON OF HOT WATER IN PIPING

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概要

• 論文の詳細を見る

• Self-flashing two-phase flow caused erosion damage to the piping just downstream from the constricted parts such as valves, orifices, etc. of the hot water piping. The cause and allowable value of erosion, caused at the diffuser behind valve, were experimentally analyzed using a half-cut diffuser in order to make the observation of inner surface easy. As the result, the intensity of the erosion was affected by the two-phase flow pattern and the divergent angle of the diffuser. The erosion was mainly caused by an eddy flow generated at the diffuser. Allowable values of erosion factors, such as averaged velocity, averaged kinetic pressure and cavitation coefficient, depended on the divergent angle of the diffuser.

• 一般社団法人日本機械学会の論文

著者

• Nakamura Shozo

  Mechanical Engineering Research Laboratory Hitachi Ltd.

• Matsushima Tokunori

  Mechanical Engineering Research Laboratory Hitachi Ltd.

• MIZUSHINA Yasuo

  Mechanical Engineering Research Laboratory, Hitachi, Ltd.

• HORIKAWA Yoriaki

  Hitachi Works, Hitachi, Ltd.

• Mizushina Yasuo

  Mechanical Engineering Research Laboratory Hitachi Ltd.

• Horikawa Yoriaki

  Hitachi Works Hitachi Ltd.

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