Experimental and Numerical Study on the Slug Characteristics and Flow-Induced Vibration of a Subsea Rigid M-Shaped Jumper

The subsea jumper has become an essential part of production systems as a gas–liquid mixing pipeline connecting the end manifold (PLEM) to Christmas tree. During oil and gas transportation, common flow pattern, alternating characteristics slug easily cause vibration, resulting in instability or fatigue damage. present study investigates experimentally numerically M-shaped its induced vibrations jumper. pattern evolution inner under different velocities are obtained: frequency velocity, well pressure fluctuation vibration caused by flow. results show that fluctuations front rear parts M-type obviously different. With increase air–water mixing, two characteristics, frequency, velocity also increase. greater influence on than liquid velocity. length decreases increases. Furthermore, numerical simulations various experimental conditions carried out. simulation data, amplitude good agreement with data.