湿天然气管道积液特性研究
[Abstract]:With the increase of natural gas demand, the safe transportation of natural gas becomes an important problem. Because part of condensate will be produced in the pipeline during the transportation, the natural gas pipeline flow is a typical two-phase flow with low liquid content. The pipeline size and downstream equipment can be designed correctly only by accurately predicting the flow pressure drop and liquid accumulation in the pipeline. The gas-liquid interface shapes will be different under different operating conditions. The pressure drop calculated by the model based on the gas-liquid interface of different shapes is very different. The establishment of gas-liquid two-phase flow model has important theoretical value and is of great significance to the safety and efficiency of pipeline transportation. Based on the in-depth literature study, this paper introduces the formation and discrimination of the concave interface of liquid accumulation in wet gas pipeline flow, and develops the theory of different interface mechanism models through programming and calculation. In this paper, FLAT model is recommended for low gas velocity (10m/s), ARS model for medium and high gas velocity (10-20m/s), MARS model for high gas velocity (20m/s), and double circle model for high gas velocity (20m/s). On the basis of comparison, the formula for calculating wet wall fraction in horizontal interface model suitable for low gas velocity is improved. In this paper, ARS model and MARS model are introduced into FLAT model to establish a formula for calculating wet wall fraction in horizontal interface model with Weber number and Froude number. Compared with the FLAT model, the proposed model predictions are in good agreement with the experimental values.
【学位授予单位】:西安石油大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TE832
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