Study on gas natural frequency of pipeline system with air cooler
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摘要: 根据空冷器国标GB/T-15386-94和工程中惯用的空冷器结构模型设计并制造了简易空冷器模型,搭建了含空冷器管道系统气柱固有频率实验测试平台;用计算流体动力学(CFD)方法建立了管道系统流体动力学模型。通过对比模拟结果与实验数据验证了试验方法(扫频法)及模拟所用方式(频响法)的合理性与正确性。基于实验和模拟结果提出了空冷器作为管道系统中特殊管路元件时合理的参数化模型即“容-管-容”参数化模型,为工程中计算含空冷器管道系统气柱固有频率提供了直接有效的方法。Abstract: A simple air cooler model is designed and manufactured based on conventional air coolers used in engineering and the national standard of GB/T-15386-94.The pipeline with the air cooler experimental system is constructed,and the fluid dynamics of the piping system is mod-eled.Comparing the numerical results with test data,it can be found that both the experimental method of frequency sweep and the numerical simulation method of frequency response are cor-rect and reasonable.The parametric model of the air cooler as a special pipe component is pro-posed based on the results of experiment and simulation,which is named as “Volume-Pipe-Vol-ume”model.It provide a direct and effective method for calculating the gas natural frequency of pipeline system with air cooler.
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