摘要
以某290 t矿用自卸车油气悬架缸为研究对象,考虑了复杂流道、涡流、流体物性变化等影响因素,基于计算流体动力学(CFD)建立了大型油气悬架缸的气液两相流数值模型,分析了不同时刻流体瞬态特性的数值变化,计算了流场内部的压力分布情况,验证了所提两相流数值模型可行性。仿真结果表明,两相流模型可以很好地表示油气相互作用,模拟悬浮液的运行过程;瞬态数值研究结果可准确应用于模拟大型油气悬架的力学特性;回弹冲程时涡流在主腔室中对称产生,表明存在大量流动分离,且随着流速的增加,涡流更加明显。
Taking the hydro-pneumatic suspension cylinder of a 290 t mining dump truck as the research object,a numerical model of gas-liquid two-phase flow of a large hydro-pneumatic suspension cylinder was established based on computational fluid dynamics(CFD),considering the complex flow passage,eddy current and fluid physical property changes.The numerical changes of fluid transient characteristics at different times were analyzed,and the pressure distribution inside the flow field was calculated.The accuracy of the proposed model is verified.The simulation results show that the two-phase flow model can well represent the oil-gas interaction and simulate the running process of the suspension.The transient numerical results can be accurately applied to simulate the mechanical characteristics of large hydro-pneumatic suspension.During the rebound stroke,vortices were symmetrically generated in the main chamber,indicating a large amount of flow separation,and vortices became more obvious with the increase of velocity.
作者
胡致慧
刘志奇
李占龙
杜锐
贺磊
HU Zhi-hui;LIU Zhi-qi;LI Zhan-long;DU Rui;HE Lei(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《太原科技大学学报》
2023年第5期410-415,共6页
Journal of Taiyuan University of Science and Technology
基金
国家自然科学基金(52772401),忻州市科技计划项目(20220107)。
关键词
油气悬架
两相流数值模型
瞬态特性
力学特性
oil-gas suspension
numerical model of two-phase flow
transient characteristic
mechanical properties
