组合式风斗混合器掺混性能数值研究
|
摘要
为了解决航空发动机地面模拟燃烧试验台直接加温器出口温度不均匀的问题,提出了一种组合式风斗混合器,并采用三维数值模拟的方法,对其掺混性能进行了研究。结果表明:在热扩散和流向涡的共同作用下,组合式风斗混合器能够改善温度场的均匀性;抽吸热气用风斗混合器对于温度均匀度的改善最好,使得温度均匀度从入口的0.9286增加到0.9501;抽吸冷气用风斗混合器对于相对温差的改善最为明显,使得相对温差从入口的0.2496减小到0.2181;完整风斗混合器的总压损失最大。
A combined wind scoop mixer was presented to solve the problem of non-uniform temperature at the exit of direct heating device used in the aero-engine simulation test. Three dimensional numerical simulation was conducted to predict the mixing performance of this mixer. It is found that this mixer could make the temperature field uniform under the effect of thermal diffusion and streamwise vortex. The pumping hot air mixer can improve the temperature homogeneity most obviously than the others,and it increases the parameter from 0.9286 to0.9501. The pumping cold air mixer reduces the relative temperature difference from 0.2496 to 0.2181,which is the best among the three mixers. The total pressure loss of the whole assembly mixer is the greatest.
A combined wind scoop mixer was presented to solve the problem of non-uniform temperature at the exit of direct heating device used in the aero-engine simulation test. Three dimensional numerical simulation was conducted to predict the mixing performance of this mixer. It is found that this mixer could make the temperature field uniform under the effect of thermal diffusion and streamwise vortex. The pumping hot air mixer can improve the temperature homogeneity most obviously than the others,and it increases the parameter from 0.9286 to0.9501. The pumping cold air mixer reduces the relative temperature difference from 0.2496 to 0.2181,which is the best among the three mixers. The total pressure loss of the whole assembly mixer is the greatest.
引文
[1]李立国,张靖周,主编.航空用引射混合器[M].北京:国防工业出版社,2007.
[2]龚英利,张惠明,王强,等.混合器对天然气-空气混合气形成过程的影响[J].燃烧科学与技术,2004,10(4):363-366.
[3]骆培成,程易,汪展文,等.液-液快速混合设备研究进展[J].化工进展,2005,24(12):1319-1326.
[4]《航空发动机设计手册》总编委会.航空发动机设计手册.(第11册):加力燃烧室[M].北京:航空工业出版社,2001.
[5]Manning T A.Experimental Studies of Mixing Flows with Streamwise Vorticity[D].USA:Massachusetts Institute of Technology,1991.
[6]Mc Cormick D C,Jr Bennett J C.Vortical and Turbulent Structure of a Lobed Mixer Free Shear Layer[J].AIAA Journal,1994,32(9):1852-1859.
[7]张靖周,谢志荣,李立国.三维强迫混合波瓣结构流场的数值研究[J].推进技术,2004,25(4):320-324.(ZHANG Jing-zhou,XIE Zhi-rong,LI Li-guo.Numerical Investigation of Three-Dimensional Flow Fields for Forced Mixer Lobe Configuration[J].Journal of Propulsion Technology,2004,25(4):320-324.)
[8]Brinkerhoff J R,Oria H,Yaras M I.Experimental and Computational Study of Mixing Mechanisms in an Axisymmetric Lobed Mixer[J].Journal of Propulsion and Power,2013,29(5):1017-1030.
[9]刘友宏,杜力伟,谢翌,等.波瓣凹扇修形对波瓣强波混合排气系统性能影响[J].科学技术与工程,2013,13(18):5226-5233.
[10]李平,王治武,南向谊,等.混合器中燃气/空气掺混特性研究[J].航空工程进展,2012,3(1):110-115.
[11]刘友宏,张少鹏,杨旭,等.波瓣尾缘切角对涡扇发动机混合排气系统气动热力性能影响[J].推进技术,2013,34(6):734-740.(LIU You-hong,ZHANG Shao-peng,YANG Xu.Effects of Cut Angles at Trailing Edge of Lobe on Aerothermodynamic Performance of Forced Mixing Exhaust System in Turbofan Engine[J].Journal of Propulsion and Power,2013,34(6):734-740.)
[12]王亚盟,张靖周,高家春,等.加力燃烧室用锯齿冠状混合器混合特性数值研究[J].航空动力学报,2011,26(1):72-77.
[13]SHAN Yong,ZHANG Jing-zhou,WANG Ya-meng.Numerical Investigation on Aerodynamic and Combustion Performance of Chevron Mixer Inside an Afterburner[J].Journal of Engineering for Gas Turbine and Power,2014,136(11).
[14]谭晓茗,聂萌萌,张靖周,等.自耦合射流强化掺混的数值研究[J].工程热物理学报,2011,32(2):299-302.
[15]陈方,吴寿生,魏福清,等.常压、双涵进气条件下小突片强化混合研究[J].航空动力学报,2002,17(1):35-39.
[16]GU Rui,XU Jing-lei,FAN Zhi-peng,et al.Numerical Investigation of Performance of the Air Tab in the Turbofan Nozzle[J].Journal of Propulsion and Power,2014,30(5):1272-1280.
[17]周冠宇,柳杨,金捷,等.采用值班火焰稳定器作小型加温器的试验研究[C].贵州:第七届航空动力年会,2010:468-473.
[18]Cooper N J,Merati P,Hu H.Numerical Simulation of the Vertical Structures in a Lobed Jet Mixing Flow Fields[R].AIAA 88-3785.
[19]Abolfadl M A,Metwally M A,El-Messiry A M,et al.Experimental Investigation of Lobed Mixer Performance[J].Journal of Propulsion and Power,2001,17(5):1109-1116.
[20]Belovich V M,Samimy M.Mixing Processes in a Coaxial Geometry with a Central Lobed Mixer-Nozzle[J].AIAA Journal,1997,35(5):838-841.
[2]龚英利,张惠明,王强,等.混合器对天然气-空气混合气形成过程的影响[J].燃烧科学与技术,2004,10(4):363-366.
[3]骆培成,程易,汪展文,等.液-液快速混合设备研究进展[J].化工进展,2005,24(12):1319-1326.
[4]《航空发动机设计手册》总编委会.航空发动机设计手册.(第11册):加力燃烧室[M].北京:航空工业出版社,2001.
[5]Manning T A.Experimental Studies of Mixing Flows with Streamwise Vorticity[D].USA:Massachusetts Institute of Technology,1991.
[6]Mc Cormick D C,Jr Bennett J C.Vortical and Turbulent Structure of a Lobed Mixer Free Shear Layer[J].AIAA Journal,1994,32(9):1852-1859.
[7]张靖周,谢志荣,李立国.三维强迫混合波瓣结构流场的数值研究[J].推进技术,2004,25(4):320-324.(ZHANG Jing-zhou,XIE Zhi-rong,LI Li-guo.Numerical Investigation of Three-Dimensional Flow Fields for Forced Mixer Lobe Configuration[J].Journal of Propulsion Technology,2004,25(4):320-324.)
[8]Brinkerhoff J R,Oria H,Yaras M I.Experimental and Computational Study of Mixing Mechanisms in an Axisymmetric Lobed Mixer[J].Journal of Propulsion and Power,2013,29(5):1017-1030.
[9]刘友宏,杜力伟,谢翌,等.波瓣凹扇修形对波瓣强波混合排气系统性能影响[J].科学技术与工程,2013,13(18):5226-5233.
[10]李平,王治武,南向谊,等.混合器中燃气/空气掺混特性研究[J].航空工程进展,2012,3(1):110-115.
[11]刘友宏,张少鹏,杨旭,等.波瓣尾缘切角对涡扇发动机混合排气系统气动热力性能影响[J].推进技术,2013,34(6):734-740.(LIU You-hong,ZHANG Shao-peng,YANG Xu.Effects of Cut Angles at Trailing Edge of Lobe on Aerothermodynamic Performance of Forced Mixing Exhaust System in Turbofan Engine[J].Journal of Propulsion and Power,2013,34(6):734-740.)
[12]王亚盟,张靖周,高家春,等.加力燃烧室用锯齿冠状混合器混合特性数值研究[J].航空动力学报,2011,26(1):72-77.
[13]SHAN Yong,ZHANG Jing-zhou,WANG Ya-meng.Numerical Investigation on Aerodynamic and Combustion Performance of Chevron Mixer Inside an Afterburner[J].Journal of Engineering for Gas Turbine and Power,2014,136(11).
[14]谭晓茗,聂萌萌,张靖周,等.自耦合射流强化掺混的数值研究[J].工程热物理学报,2011,32(2):299-302.
[15]陈方,吴寿生,魏福清,等.常压、双涵进气条件下小突片强化混合研究[J].航空动力学报,2002,17(1):35-39.
[16]GU Rui,XU Jing-lei,FAN Zhi-peng,et al.Numerical Investigation of Performance of the Air Tab in the Turbofan Nozzle[J].Journal of Propulsion and Power,2014,30(5):1272-1280.
[17]周冠宇,柳杨,金捷,等.采用值班火焰稳定器作小型加温器的试验研究[C].贵州:第七届航空动力年会,2010:468-473.
[18]Cooper N J,Merati P,Hu H.Numerical Simulation of the Vertical Structures in a Lobed Jet Mixing Flow Fields[R].AIAA 88-3785.
[19]Abolfadl M A,Metwally M A,El-Messiry A M,et al.Experimental Investigation of Lobed Mixer Performance[J].Journal of Propulsion and Power,2001,17(5):1109-1116.
[20]Belovich V M,Samimy M.Mixing Processes in a Coaxial Geometry with a Central Lobed Mixer-Nozzle[J].AIAA Journal,1997,35(5):838-841.