不同淬熄结构下RQL燃烧室流场特性的数值研究
|
摘要
采用雷诺平均Navier-Stokes(RANS)方法对不同淬熄结构的富油/淬熄/贫油(RQL)燃烧室内定常掺混流动过程进行了数值模拟,分析了不同截面的流场结构,研究了动量通量比及淬熄孔排布方式的影响。结果表明:射流进入RQL燃烧室后发生偏转且偏转方向和旋流方向有关,回流区长度、穿透深度和高湍动能区随着动量通量比的增大而增加;当J≥80时,淬熄射流下游出现高湍动能区,逐渐与上游融为一体;当J≥120时,回流区的长度基本不再发生明显变化。此外,非中心对冲结构C3具有更大的高湍动能区,掺混更均匀。
The Reynolds averaged Navier-Stokes(RANS)method was used to simulate the steady flow process in rich-burn/quench/lean-burn(RQL)combustors of different quenching structures.The flow field structure of different cross sections was analyzed to study the effects of momentum flux ratio and quenching hole arrangement.Results showed that the jet deflected after entering the RQL combustor and the deflection direction was related to the swirling direction.The recirculation zone length,jet depth and high kinetic energy zone increased with the increase of the momentum flux ratio.When J≥80,a high kinetic energy zone appeared downstream the quenching jet,and gradually merged with the upstream.When J≥120,the length of the recirculation zone was substantially no longer changed.In addition,the non-central opposed jet structure C3 had a larger turbulent kinetic energy zone with better mixing.
The Reynolds averaged Navier-Stokes(RANS)method was used to simulate the steady flow process in rich-burn/quench/lean-burn(RQL)combustors of different quenching structures.The flow field structure of different cross sections was analyzed to study the effects of momentum flux ratio and quenching hole arrangement.Results showed that the jet deflected after entering the RQL combustor and the deflection direction was related to the swirling direction.The recirculation zone length,jet depth and high kinetic energy zone increased with the increase of the momentum flux ratio.When J≥80,a high kinetic energy zone appeared downstream the quenching jet,and gradually merged with the upstream.When J≥120,the length of the recirculation zone was substantially no longer changed.In addition,the non-central opposed jet structure C3 had a larger turbulent kinetic energy zone with better mixing.
引文
[1]MOSIER S A,PIERCE R M.Advanced combustor systems for stationary gas turbine engines:PhaseⅠreview and preliminary evaluation[R].Florida:US:Environmental Protection Agency,1980.
[2]SAMUELSEN S.The gas turbine handbook[M].Morgantown,US:Department of Energy,Office of Fossil Energy,National Energy Technology Laboratory,2006.
[3]金义,何小民,蒋波.富油燃烧/快速淬熄/贫油燃烧(RQL)工作模式下驻涡燃烧室排放性能试验[J].航空动力学报,2011,26(5):1031-1036.JIN Yi,HE Xiaomin,JIANG Bo.Experimental study on emission performance of rich-burn quick-quench lean-burn(RQL)trapped-vortex combustor[J].Journal of Aerospace Power,2011,26(5):1031-1036.(in Chinese)
[4]BLOMEYER M,KRAUTKREMER B,HENNECKE DK,et al.Mixing zone optimization of a rich-burn/quickmix/lean-burn combustor[J].Journal of Propulsion and Power,1999,15(2):288-295.
[5]OECHSLE V L,MONGIA H C,HOLDEMAN J D.Comparison of mixing calculations for reacting and non-reacting flows in a cylindrical duct[R].AIAA 1994-0865,1994.
[6]LEONG M Y,SAMUELSEN G S,HOLDEMAN J D.Optimization of jet mixing into a rich,reacting crossflow[J].Journal of Propulsion and Power,2000,16(5):729-735.
[7]LEONG M Y,SAMUELSEN G S.Jet mixing in a reacting cylindrical crossflow[R].AIAA 1995-3109,1995.
[8]ZHU G,LAI M C,LEE T.Penetration and mixing of radial jets in neck-down cylindrical crossflow[J].Journal of Propulsion and Power,1995,11(2):252-260.
[9]ZHU G,LAI M C.A parametric study of penetration and mixing of radial jets in necked-down cylindrical crossflow[R].AIAA 1992-309,1992.
[10]SHIH T I P,NGUYEN H L,HOWE G W,et al.Simulation of mixing in the quick quench region of a rich burnquick quench mix-lean burn combustor[R].AIAA 1991-0410,1991.
[11]吉雍彬,葛冰,毛荣海,等.富油/淬熄/贫油(RQL)燃烧室燃烧和排放特性的实验研究[J].推进技术,2017,38(6):1335-1342.JI Yongbin,GE Bing,MAO Ronghai,et al.Experimental study on combustion and emission characteristics of richburn/quench/lean-burm(RQL)combustor[J].Journal of Propulsion Technology,2017,38(6):1335-1342.(in Chinese)
[12]虞江鹏,吉雍彬,葛冰,等.RQL燃烧室流场特性研究[J].热能动力工程,2017,32(4):57-63.YU Jiangpeng,JI Yongbin,GE Bing,et al.Flow field characteristics of RQL combustor[J].Journal of Engineering for Thermal Energy and Power,2017,32(4):57-63.(in Chinese)
[13]MOHAMMAD B,JENG S M,ANDAC M G.Influence of the primary jets and fuel injection on the aerodynamics of a prototype annular gas turbine combustor sector[J].ASMEPaper GT2011-11505,2011.
[14]GALEAZZO F C C,DONNERT G,CRDENAS C,et al.Computational modeling of turbulent mixing in a jet in crossflow[J].International Journal of Heat and Fluid Flow,2013(41):55-65.
[15]TAUTSCHNIG G,HANER E,HIRSCH C,et al.Experimental and numerical investigation of confined jets in hot co-flow[J].ASME Paper GT2014-25843,2014.
[16]NADA S A,FOUDA A,ELATTAR H F.Parametric study of flow field and mixing characteristics of outwardly injected jets into a crossflow in a cylindrical chamber[J].International Journal of Thermal Sciences,2016,100(102):185-201.
[17]WALTERS D K,COKLJAT D.A three-equation eddy-viscosity model for Reynolds-averaged Navier-Stokes simulations of transitional flow[J].Journal of Fluids Engineering,2008,130(12):320-327.
[18]AHRENS D,KOLB M,HIRSCH C,et al.NOx formation in a reacting premixed jet in hot cross flow[J].ASME Paper GT2014-26139,2014.
[19]NAGAO T,MATSUNO S,HAYASHI A K.Fluid mixing of opposed jet flows in the rectangular duct[R].AIAA2013-0872,2013.
[2]SAMUELSEN S.The gas turbine handbook[M].Morgantown,US:Department of Energy,Office of Fossil Energy,National Energy Technology Laboratory,2006.
[3]金义,何小民,蒋波.富油燃烧/快速淬熄/贫油燃烧(RQL)工作模式下驻涡燃烧室排放性能试验[J].航空动力学报,2011,26(5):1031-1036.JIN Yi,HE Xiaomin,JIANG Bo.Experimental study on emission performance of rich-burn quick-quench lean-burn(RQL)trapped-vortex combustor[J].Journal of Aerospace Power,2011,26(5):1031-1036.(in Chinese)
[4]BLOMEYER M,KRAUTKREMER B,HENNECKE DK,et al.Mixing zone optimization of a rich-burn/quickmix/lean-burn combustor[J].Journal of Propulsion and Power,1999,15(2):288-295.
[5]OECHSLE V L,MONGIA H C,HOLDEMAN J D.Comparison of mixing calculations for reacting and non-reacting flows in a cylindrical duct[R].AIAA 1994-0865,1994.
[6]LEONG M Y,SAMUELSEN G S,HOLDEMAN J D.Optimization of jet mixing into a rich,reacting crossflow[J].Journal of Propulsion and Power,2000,16(5):729-735.
[7]LEONG M Y,SAMUELSEN G S.Jet mixing in a reacting cylindrical crossflow[R].AIAA 1995-3109,1995.
[8]ZHU G,LAI M C,LEE T.Penetration and mixing of radial jets in neck-down cylindrical crossflow[J].Journal of Propulsion and Power,1995,11(2):252-260.
[9]ZHU G,LAI M C.A parametric study of penetration and mixing of radial jets in necked-down cylindrical crossflow[R].AIAA 1992-309,1992.
[10]SHIH T I P,NGUYEN H L,HOWE G W,et al.Simulation of mixing in the quick quench region of a rich burnquick quench mix-lean burn combustor[R].AIAA 1991-0410,1991.
[11]吉雍彬,葛冰,毛荣海,等.富油/淬熄/贫油(RQL)燃烧室燃烧和排放特性的实验研究[J].推进技术,2017,38(6):1335-1342.JI Yongbin,GE Bing,MAO Ronghai,et al.Experimental study on combustion and emission characteristics of richburn/quench/lean-burm(RQL)combustor[J].Journal of Propulsion Technology,2017,38(6):1335-1342.(in Chinese)
[12]虞江鹏,吉雍彬,葛冰,等.RQL燃烧室流场特性研究[J].热能动力工程,2017,32(4):57-63.YU Jiangpeng,JI Yongbin,GE Bing,et al.Flow field characteristics of RQL combustor[J].Journal of Engineering for Thermal Energy and Power,2017,32(4):57-63.(in Chinese)
[13]MOHAMMAD B,JENG S M,ANDAC M G.Influence of the primary jets and fuel injection on the aerodynamics of a prototype annular gas turbine combustor sector[J].ASMEPaper GT2011-11505,2011.
[14]GALEAZZO F C C,DONNERT G,CRDENAS C,et al.Computational modeling of turbulent mixing in a jet in crossflow[J].International Journal of Heat and Fluid Flow,2013(41):55-65.
[15]TAUTSCHNIG G,HANER E,HIRSCH C,et al.Experimental and numerical investigation of confined jets in hot co-flow[J].ASME Paper GT2014-25843,2014.
[16]NADA S A,FOUDA A,ELATTAR H F.Parametric study of flow field and mixing characteristics of outwardly injected jets into a crossflow in a cylindrical chamber[J].International Journal of Thermal Sciences,2016,100(102):185-201.
[17]WALTERS D K,COKLJAT D.A three-equation eddy-viscosity model for Reynolds-averaged Navier-Stokes simulations of transitional flow[J].Journal of Fluids Engineering,2008,130(12):320-327.
[18]AHRENS D,KOLB M,HIRSCH C,et al.NOx formation in a reacting premixed jet in hot cross flow[J].ASME Paper GT2014-26139,2014.
[19]NAGAO T,MATSUNO S,HAYASHI A K.Fluid mixing of opposed jet flows in the rectangular duct[R].AIAA2013-0872,2013.