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Abstract: RNG k-e turbulence model is applied to simulate the
cavitating flow issued by the orifice flow of poppet valve. Experiments
are conducted to catch cavitation images around the valve seat of the
poppet valve from the perpendicular directions , using a pair of
industrial fiberscopes and high-speed video cameras integrated
visualization system. The binary cavitating flow field distributions
obtained from digital processing of original cavitation image show a
good agreement with the numerical results. The results therefore
indicate that RNG k-e turbulence model could achieve a reasonable
prediction for the cavitating flow within the poppet valve as well as
other hydraulic components. Besides, the vibrations of the valve body
and poppet induced by the cavitating flow are detected using vortex
displacement transducer, laser displacement meter and digital strain
device.
Key words: Poppet valve Cavitation Flow field simulation
Flow visualization
CLC No: TH137
国家自然科学基金和教育部留学回国人员科研启动基金资助项目(59835160、50175097). Received 20010618,
received in revised form 20011206
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