Wet gas can form liquid loading at the lower line pipe sections,so the transportation efficiency will be impacted and the line pipes will be corroded and even blocked.Therefore,to accurately predict the critical liqui...Wet gas can form liquid loading at the lower line pipe sections,so the transportation efficiency will be impacted and the line pipes will be corroded and even blocked.Therefore,to accurately predict the critical liquid-carrying velocity of gas is of great significance to preventing the liquid loading in wet gas line pipes.In view of the gaseliquid two-phase stratified flow in micro-tilting line pipes with low liquid content,this paper newly established a critical liquid-carrying velocity prediction model considering droplet entrainment according to the momentum balance equation of a gaseliquid two-phase flow and the closure relationship of a new gaseliquid interface shape.Then,based on the experimental data,the new model,FLAT model,ARS model,double-circle model and MARS model were verified and their prediction results were compared.Finally,the new model was applied to analyze the effects of pipe dip,operational pressure,liquid density and gas component on the critical liquid-carrying velocity and critical liquid content of natural gasewater and natural gase-60%glycerine with water stratified flow in a microtilting line pipe.And the following research results were obtained.First,with the increase of pipe dip and liquid density,the critical liquidcarrying velocity increases continuously and the critical liquid content decreases gradually.Second,with the increase of operational pressure and heavy component content,the critical liquid-carrying velocity decreases continuously and the critical liquid content increases gradually.In conclusion,the new model is higher in prediction accuracy and its prediction result is better accordant with the experimental value,so it can be used to predict the critical liquid-carrying velocity in wet gas line pipes.展开更多
基金supported by National Natural Science Foundation of China“Thermodynamic behavior investigation,energy efficiency analysis and structural optimization of longitudinal finned tubes of air-heated vaporizer in the integrated cold energy thermoelectric generator”and“Enhanced heat transfer mechanism and structural optimization of innovative heat transfer tube of open rack vaporizer”(No.:51774237 and 51304160)Shaanxi Provincial Scientific Project for Postdoctors“Study on kinetic behaviors of gaseliquid two-phase swirling flow caused by helical tape in vortex borehole”(No.:20168630)Special Research Program of the Education Department of Shaanxi Province“Integration and optimization of cold energy utilization and light hydrocarbon recycling processes at LNG receiving terminal based on the multi-objective comprehensive evaluation method”(No.:15JK1581).
文摘Wet gas can form liquid loading at the lower line pipe sections,so the transportation efficiency will be impacted and the line pipes will be corroded and even blocked.Therefore,to accurately predict the critical liquid-carrying velocity of gas is of great significance to preventing the liquid loading in wet gas line pipes.In view of the gaseliquid two-phase stratified flow in micro-tilting line pipes with low liquid content,this paper newly established a critical liquid-carrying velocity prediction model considering droplet entrainment according to the momentum balance equation of a gaseliquid two-phase flow and the closure relationship of a new gaseliquid interface shape.Then,based on the experimental data,the new model,FLAT model,ARS model,double-circle model and MARS model were verified and their prediction results were compared.Finally,the new model was applied to analyze the effects of pipe dip,operational pressure,liquid density and gas component on the critical liquid-carrying velocity and critical liquid content of natural gasewater and natural gase-60%glycerine with water stratified flow in a microtilting line pipe.And the following research results were obtained.First,with the increase of pipe dip and liquid density,the critical liquidcarrying velocity increases continuously and the critical liquid content decreases gradually.Second,with the increase of operational pressure and heavy component content,the critical liquid-carrying velocity decreases continuously and the critical liquid content increases gradually.In conclusion,the new model is higher in prediction accuracy and its prediction result is better accordant with the experimental value,so it can be used to predict the critical liquid-carrying velocity in wet gas line pipes.
