论文部分内容阅读
天然气中含有的水蒸气往往会导致单位体积气体热值降低,减少输送管道的通流面积,其中的CO2和H2S溶于液态水后还会腐蚀管路。针对实际开采高压天然气含水问题,结合流体力学和工程热力学原理,设计了一套前置式超音速天然气旋流脱水装置。基于国内外研究现状,建立了超音速旋流天然气凝结流动的数值模型,包括多组分两相膨胀流动模型和水蒸汽凝结模型。对超音速旋流天然气脱水装置各个工作段的流动特性进行了数值研究,得出装置内部压力、温度、马赫数、水蒸气内部成核率、湿度的分布规律,并根据数值模拟结果对超音速旋流天然气脱水装置进行了优化设计。Watervapor in natural gas often leads to gas calorific value per unit volume decrease; it also reduces the flow area of pipeline. In combination with fluid mechanics and engineering thermodynamics principle, a roof-mounted type supersonic cyclone flow natural gas dehydration unit was designed. Based on the research status at home and abroad, the supersonic natural gas condensate flow numerical model was built, including multicomponent two-phase flow model and water vapor condensing model. The flow characteristics of each work section of supersonic natural gas dehydration unit were numerical analyzed. The device internal pressure, temperature, Mach number, vapor nucleation rate, moisture distribution were obtained. According to the results of numerical simulation, optimization design was done to improve the efficiency of separation
The water vapor contained in natural gas often leads to the decrease of calorific value per unit volume of gas and the reduction of the flow area of the pipeline. The CO2 and H2S will also corrode the pipeline after being dissolved in liquid water. Aiming at the problems of actual exploitation of high pressure natural gas, a set of front supersonic natural gas cyclone dewatering device was designed according to the principles of fluid mechanics and engineering thermodynamics. Based on the research status at home and abroad, a numerical model of the condensation flow of supersonic swirling natural gas is established, including the multi-component two-phase expansion flow model and the water vapor condensation model. The flow characteristics of each working section of the supersonic swirling natural gas dehydration unit were numerically studied, and the distribution laws of pressure, temperature, Mach number, nucleation rate and humidity of water vapor were obtained. Based on the numerical simulation results, the supersonic Swirling natural gas dehydration device was optimized. In combination with fluid mechanics and engineering thermodynamics principle, a roof-mounted type supersonic cyclone flow natural gas dehydration unit was designed. Based on the research status at home and abroad, the supersonic natural gas condensate flow numerical model was built, including multicomponent two-phase flow model and water vapor condensing model. The flow characteristics of each work section of supersonic natural gas dehydration unit were quantitative analyzed. The device internal pressure, temperature, Mach number, vapor nucleation rate, moisture distribution were obtained. According to the results of numerical simulation, optimization design was done to improve the efficiency of separation