摘要
采用RNG k-ε湍流模型和有限体积法对添加DR-12型乳液聚合物降阻剂的连续相混合介质进行数值模拟,分析了降阻剂对多孔旋转射流喷头流场特性的影响规律,得到了喷头各喷嘴射流形态和压力场、速度场的变化情况。结果表明:添加降阻剂可以有效提高射流的密集性、作用喷距和喷头内部静压力值,而对动压力和射流速度影响有限;在入口压力50 MPa时,喷头各喷嘴静压力提高了2.67~5.36倍,而动压力和射流速度仅提高了1.04~1.06倍和1.02~104倍;随着入口压力变化,喷头各喷嘴平均静压提高了3.25~3.76倍,降阻效果更为明显,进而验证了添加降阻剂可以有效降低多孔旋转喷头的压力损耗。
RNG k-εturbulence model and finite volume method are used for porous rotating jet to analyze the continuous phase with DR-12 emulsion polymer drag reducer.Numerical simulation of mixed media is carried out to analyze the influence of the resistance reducer on the flow field characteristics of the nozzle,and the changes of the jet shape,pressure field and velocity field of each nozzle of the nozzle are obtained.The results show that it is found that the addition of drag reducers can effectively increase the jet density,the effective spray distance and the internal static pressure of the nozzle,while the dynamic pressure and jet velocity are limited;when the inlet pressure is 50 MPa,the static pressure of the nozzle has increased by 2.67 to 5.36 times,while the dynamic pressure and jet velocity have only increased by 1.04 to 1.06 times and 1.02 to 104 times;with the change of inlet pressure,the average static pressure of each nozzle of the nozzle has increased by 3.25 to 3.76 times,and the resistance reduction effect is more obvious,and it is verified that adding a resistance reducing agent can effectively reduce the pressure loss of the porous rotating nozzle.
作者
巴全斌
BA Quanbin(State Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400031,China;China Coal Technology,and Engineering Group Chongqing Research Institute,Chongqing 400037,China)
出处
《煤矿安全》
CAS
北大核心
2021年第5期170-174,共5页
Safety in Coal Mines
基金
中国煤炭科工集团科技创新创业资金专项资助项目(2019-TD-QN038,2019-TD-MS017)
中煤科工集团重庆研究院有限公司自立创新引导资助项目(2018ZDXM05)。
关键词
水力增透
降阻剂
多孔旋转喷头
流场特性
数值模拟
hydraulic enhancement
drag reducer
porous rotary nozzle
flow characteristics
numerical simulation
