冷孔板直径与冷流率对涡流管流场的影响
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摘要
以理想二氧化碳气体为工质,采用Standard k-ε湍流模型,对涡流管能量分离效应进行数值模拟。在此基础上,探究涡流管轴向、切向速度分布以及冷孔板直径与冷流率之间的关系。模拟结果表明:当进口温度为298.15 K、进口压力为6.5 MPa、冷流率μ为0.1—0.9、冷孔板直径R在1.5—3.5 mm范围变化时,随着冷孔板直径的增大,轴向速度逐渐增大,切向速度逐渐减小;制冷温度效应呈现先增大后减小的趋势、随着冷流率的增大,冷热流分界面逐渐增大,制冷温度效应呈现逐渐减小的趋势。
The energy separation effect of vortex tube was numerically simulated by using Standard k-turbulence model with ideal carbon dioxide gas as working medium. On this basis,the axial and tangential velocity distribution of the vortex tube,the energy separation performance,and the relationship between the diameter of the cold orifice plate and the cold flow rate were investigated with the inlet temperature was 298.15 K and the inlet pressure was 6.5 MPa. The simulation results show that when the cold flow rate μ is 0.1-0.9 and the cold hole plate diameter R changes in the range of 1.5-3.5 mm,the axial velocity gradually increases,and the tangential velocity gradually decreases with the increase of the cold orifice plate diameter. The cooling temperature effect first increases and then decreases. With the increase of cold flow rate,the interface between cold and hot flow increases gradually,and the cooling temperature effect tends to decrease gradually.
The energy separation effect of vortex tube was numerically simulated by using Standard k-turbulence model with ideal carbon dioxide gas as working medium. On this basis,the axial and tangential velocity distribution of the vortex tube,the energy separation performance,and the relationship between the diameter of the cold orifice plate and the cold flow rate were investigated with the inlet temperature was 298.15 K and the inlet pressure was 6.5 MPa. The simulation results show that when the cold flow rate μ is 0.1-0.9 and the cold hole plate diameter R changes in the range of 1.5-3.5 mm,the axial velocity gradually increases,and the tangential velocity gradually decreases with the increase of the cold orifice plate diameter. The cooling temperature effect first increases and then decreases. With the increase of cold flow rate,the interface between cold and hot flow increases gradually,and the cooling temperature effect tends to decrease gradually.
引文
1 曹勇.小流量涡流管特性的理论与实验研究[D].杭州:浙江大学,2003.Cao Yong. Theoretical and experimental study on the characteristics of small flow vortex tubes[D].Hangzhou:Zhejiang University,2003.
2 计玉帮,吴玉庭,丁雨,等.涡流管结构参数对其性能的影响[J].航空动力学报,2006(1):88-93.Ji Yubang,Wu Yuting,Ding Yu,et al. Influence of structural parameters of vortex tube on its performance[J].Journal of Aerospace Power,2006(1):88-93.
3 高彦宁.涡流管性能研究与参数优化[D].大连:大连理工大学,2007.Gao Yanning. Research on vortex tube performance and parameter optimization[D]. Dalian:Dalian University of Technology,2007.
4 Yilmaz M.A Review on design criteria for vortex tube[J]. Heat Mass Transfer,2009,45:613-632.
5 申江,边煜竣,郭欣炜. 冷端孔径对涡流管性能影响的实验研究[J]. 制冷学报,2017,38(6):87-93.Shen Jiang,Bian Wei,Guo Xinwei. Experimental study on the effect of the cold end pore size on the performance of vortex tube[J]. Journal of Refrigeration,2017,38(06):87-93.
6 Skye H M,Nellis G F,Klein S A. Comparison of CFD analysis to empirical data in a comm-ercial vortex tube[J].International Journal of re-frigeration,2006,29(1):71-80.
7 H R Thakare,A D Parekh. CFD analysis of en-ergy separation of vortex tube employing differentgases,turbulence models and discretisationschemes[J]. International Journal of Heat and Mass Transfer,2014,78:360-370.
8 T Dutta,K P Sinhamahapatra,S S Bandyopdhyay. Comparison of different turbulence models in predicting the temperature separation in a Ranque-Hilsch vortex tube tube[J]. International Journal of Refrigeration,2012,33:783-792.
9 周少伟,姜任秋,宋福元,等.涡流管内三维强旋流流场数值模拟[J]. 机械工程学报,2007(12):229-234.Zhou Shaowei,Jiang Renqiu,Song Fuyuan,et al. Numerical simulation of three-dimensional strong swirling flow in vortex tube[J]. Journal of Mechanical Engineering,2007(12):229-234.
10 李龙,何望云,李言,等.小管径涡流管三维数值模拟及热力学过程分析[J].机械科学与技术,2016,35(5):734-739.Li Long,He Wangyun,Li Yan,et al. Three-dimensional numerical simulation of vortex tube with small diameter and thermodynamic analysis[J]. Journal of Mechanical Engineering,2016,35(5):734-739.
2 计玉帮,吴玉庭,丁雨,等.涡流管结构参数对其性能的影响[J].航空动力学报,2006(1):88-93.Ji Yubang,Wu Yuting,Ding Yu,et al. Influence of structural parameters of vortex tube on its performance[J].Journal of Aerospace Power,2006(1):88-93.
3 高彦宁.涡流管性能研究与参数优化[D].大连:大连理工大学,2007.Gao Yanning. Research on vortex tube performance and parameter optimization[D]. Dalian:Dalian University of Technology,2007.
4 Yilmaz M.A Review on design criteria for vortex tube[J]. Heat Mass Transfer,2009,45:613-632.
5 申江,边煜竣,郭欣炜. 冷端孔径对涡流管性能影响的实验研究[J]. 制冷学报,2017,38(6):87-93.Shen Jiang,Bian Wei,Guo Xinwei. Experimental study on the effect of the cold end pore size on the performance of vortex tube[J]. Journal of Refrigeration,2017,38(06):87-93.
6 Skye H M,Nellis G F,Klein S A. Comparison of CFD analysis to empirical data in a comm-ercial vortex tube[J].International Journal of re-frigeration,2006,29(1):71-80.
7 H R Thakare,A D Parekh. CFD analysis of en-ergy separation of vortex tube employing differentgases,turbulence models and discretisationschemes[J]. International Journal of Heat and Mass Transfer,2014,78:360-370.
8 T Dutta,K P Sinhamahapatra,S S Bandyopdhyay. Comparison of different turbulence models in predicting the temperature separation in a Ranque-Hilsch vortex tube tube[J]. International Journal of Refrigeration,2012,33:783-792.
9 周少伟,姜任秋,宋福元,等.涡流管内三维强旋流流场数值模拟[J]. 机械工程学报,2007(12):229-234.Zhou Shaowei,Jiang Renqiu,Song Fuyuan,et al. Numerical simulation of three-dimensional strong swirling flow in vortex tube[J]. Journal of Mechanical Engineering,2007(12):229-234.
10 李龙,何望云,李言,等.小管径涡流管三维数值模拟及热力学过程分析[J].机械科学与技术,2016,35(5):734-739.Li Long,He Wangyun,Li Yan,et al. Three-dimensional numerical simulation of vortex tube with small diameter and thermodynamic analysis[J]. Journal of Mechanical Engineering,2016,35(5):734-739.