【摘要】 在水下油气生产系统中，针对水下采油井口的突然开启和关闭、油气输送的非连续性造成管道内油气输送速度剧烈变化，从而在管道中形成压力波动，对水下法兰连接器透镜垫造成压力冲击的问题，通过分层流模型确定气液参数，借助Fluent中的VOF模型对水下法兰连接器部分内的气液两相流介质进行模拟，选用RNG k-ε湍流模型对水下法兰连接器部分油气流动参数进行分析计算及模拟求解，分析了不同输送速度连接器部分内油气对外压力的分布。结果显示，最大压力冲击的增量与油气输送速度平方的增量近似成正比关系，在考虑油气输送速度对水下法兰连接器透镜垫内壁最大压力冲击后，透镜垫最大等效应力增大9.36%，疲劳寿命下降51.33%。更多还原

【Abstract】 In the subsea oil and gas production system,aiming at the sudden opening and closing of the subsea oil production wellhead and the discontinuity of oil and gas delivery,which cause drastic changes in the oil and gas delivery speed in the pipeline,resulting in pressure fluctuations in the pipeline and pressure impact on the subsea flange connector lens pad,the stratified flow model is used to determine the gas and liquid parameters. By using the VOF model in Fluent,the gas-liquid two-phase flow medium in the subsea flange connector was simulated. The RNG k-ε turbulence model was used to analyze and calculate the oil and gas flow parameters in the subsea flange connector,and the distribution of oil and gas external pressure in the connector at different transport speeds was analyzed. The results show that the increment of the maximum pressure impact is approximately proportional to the increment of the square of the oil and gas transport speed. After considering the maximum pressure impact of the oil and gas transport speed on the inner wall of the lens pad of the subsea flange connector,the maximum equivalent stress of the lens pad increases by 9.36% and the fatigue life decreases by 51.33%.更多还原