基于动网格技术的串并联囊式压力脉动衰减器的特性研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (5) : 254-260.

论文

辛清1，张永祥1，朱群伟2，杨芮3

作者信息 +

Characteristics of series-parallel cystic pressure pulsation attenuator based on dynamic mesh technology

XIN Qing1, ZHANG Yongxiang1, ZHU Qunwei2, YANG Rui3

Author information +

文章历史 +

摘要

针对无法定量分析计算囊式衰减器衰减效果的问题，以某囊式衰减器为研究对象，运用动网格技术结合用户自定义函数（UDF）对串联和并联式衰减器进行数值计算。克服了有限元流体计算中的发散问题和动网格更新过程中的负体积问题，在不同的脉动频率下，对囊式衰减器进行动态模拟，结果表明，串联式衰减器对压力脉动的衰减效果优于并联式；流体脉动频率与衰减器固有频率一致时衰减效果最好，最佳衰减率可达85％以上。仿真结果与实验结果基本吻合，验证了仿真模型的有效性和实用性，为提高囊式衰减器的衰减性能，也为变边界问题的分析研究提供了新的方法和思路。

Abstract

To solve the problem that the attenuation effect of the bladder pressure pulsation attenuator can not be quantitatively analyzed, a bladder pressure pulsation attenuator was taken as the research object, and the dynamic mesh technology was combined with the User-Defined-Function (UDF) to calculate the serial and parallel attenuators. Overcoming the divergence problem in finite-element fluid calculation and the negative volume problem in dynamic mesh updating process, the bladder pressure pulsation attenuator was dynamically simulated under different fluctuating frequencies. The results show that serial attenuator attenuates pressure pulsation better than parallel one does, especially when the fluid fluctuation frequency is consistent with attenuator's natural frequency. The optimal attenuation rate can reach more than 85%. The simulation results match the experimental results, that verifies the model's validity and practicability, and also provides a new method and idea to improve bladder attenuator's perfomance and analyze the variable boundary problem.

导出引用

辛清1，张永祥1，朱群伟2，杨芮3. 基于动网格技术的串并联囊式压力脉动衰减器的特性研究[J]. 振动与冲击, 2021, 40(5): 254-260

XIN Qing1, ZHANG Yongxiang1, ZHU Qunwei2, YANG Rui3. Characteristics of series-parallel cystic pressure pulsation attenuator based on dynamic mesh technology[J]. Journal of Vibration and Shock, 2021, 40(5): 254-260

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