The pigging physical model was analyzed,and the mathematic models for expressing characteristic parameters of slug flow of pig,the dynamic model and numerical calculation method were developed.

• 在分析清管物理模型的基础上,建立了清管器前段塞流动的特征参数计算模型、动态数学模型以及相应的数值计算方法,并进行了数值模拟。