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Abstract: From the view of flow field control, the influence of
internal structure on cavitations as well as cavitating induced noise
within a hydraulic relief valve is investigated. The CFD (Computational
fluid dynamics) and flow visualization approaches are used to obtain
static pressure distributions and cavitation images in the channel of
the main stage of the valve. The predicted low-pressure regions agree
well with the observed cavitation areas. In addition, the noise level
from two main internal structures of relief valves are tested and
compared. The results show that the main element with circumferential
undercut groove can suppress the cavitations and cavitating noise. The
work provides some useful reference for the low noise design of
hydraulic component involving internal structure optimization.
Key words: Relief valve Flow field control Cavitation Noise
CLC No: TH137.52
国家自然科学基金(59835160、50175097)和教育部高校博士点基金资助项目(2000033501). Received 20011016,
received in revised form 20020228
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