Simulations of the unsteady fluid-structure coupling characteristics of a conical orifice valve

doi:10.16511/j.cnki.qhdxxb.2018.22.006

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (1) : 35-42. DOI: 10.16511/j.cnki.qhdxxb.2018.22.006

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Simulations of the unsteady fluid-structure coupling characteristics of a conical orifice valve

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Abstract

The dynamics of a conical orifice valve in a heavy-duty vehicle damper were analyzed using 3-D fluid-structure coupling finite element models solved using the direct coupling computational method. The results show the internal 3-D transient fluid pressure and velocity distributions for transient inlet flow rates and the unsteady high-frequency fluctuations of the valve opening and the forces on the valve. The dynamic responses are given for various compression spring characteristics, valve structure parameters and inlet flow rates to understand the fluid-structure coupling self-excited vibrations of the valve. The results show that heavily preloaded valve springs and small inlet flow rates lead to high-frequency fluctuations of the valve opening and collisions of the core onto the seat. In addition, a zero preload of the valve spring eliminates the fluid-structure coupling vibrations and large inlet flow rates reduce the unsteady opening fluctuations. These conclusions are important for understanding fluid-structure coupling self-excited vibration problems in valves.

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3-D fluid-structure coupling dynamics / self-exited vibration / finite-element simulation / direct coupling numerical method / conical orifice valve / hydraulic damper

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LÜ Zhenhua, LI Ming. Simulations of the unsteady fluid-structure coupling characteristics of a conical orifice valve[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(1): 35-42 https://doi.org/10.16511/j.cnki.qhdxxb.2018.22.006

References

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