Abstract
Under certain circumstances where there is a relatively great difference between inner pressures of output and input pipelines of a compressor, a so-called bypass pipeline is used to connect the pipelines of the compressor. When a control valve is quickly opened, the pressure difference generates a pressure surge that might affect the operational safety of the pipeline along which the pressure wave propagates. In this work dynamic effects of a pressure surge created in the bypass pipeline of one of the compressors of a transit gas pipeline are investigated using the finite element method.
Highlights
1 Introduction In this work we carried out a complex analysis of a pressure surge and investigated its influence on a bypass pipeline of a compressor during the pipeline shutdown due to a malfunction of the compressor
The primary goal of this work is to predict the response of the bypass pipeline to the dynamic excitation caused by the pressure surge
In the transit gas pipeline average annual properties of the natural gas were used as initial material properties
Summary
In this work we carried out a complex analysis of a pressure surge and investigated its influence on a bypass pipeline of a compressor during the pipeline shutdown due to a malfunction of the compressor. In the non-stationary fluid flow analyses natural gas material properties have been used. In the transit gas pipeline average annual properties of the natural gas were used as initial material properties. The inner pressure value in the suction (input) pipeline was 4.95 MPa and the inner pressure in the discharge (outlet) pipeline was 6.3 MPa in the analysis. The initial temperature of the expanding gas was 50◦C before the valve and 23 ◦C behind the valve
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