Experiment on effect of misalignment on outlet flow field of double-swirler
-
摘要: 为了研究双级旋流器在不同偏心量下的冷态流场变化,设计了4种偏心量(分别为0,0.5,1.0,1.7mm偏心)的双级旋流器试验件,并采用粒子图像测速仪(PIV),测量了不同偏心量下流场.试验结果表明:0.5mm偏心下的流场较无偏心下变化较小,但当偏心量大于0.5mm时,双级旋流器出口下游规则的双涡结构变得不对称,并且中心回流区变窄,流场与无偏心下相比差别较大;偏心对双级旋流器出口下游径向速度分布影响较大,在双级旋流器出口X/D=0.5轴向位置附近,当偏心量大于0.5mm时气流径向速度分量变为正向峰值.Abstract: In order to study the flow field characteristics downstream a double-swirler outlet, four double-swirler configurations with different misaligned dimensions (0,0.5,1.0,1.7mm) were designed. The no-reacting flow field of different misaligned dimensions was obtained by PIV. Expermental result shows that there is no significant difference in the flow field between misaligned dimension of 0mm and 0.5mm. In the configurations of misaligned dimension larger than 0.5mm, the double-vortex construction and the central recirculation zone downstream the double-swirler outlet become asymmetrical and narrow respectively. The flow filed show obvious deviation from the one of 0mm misaligned dimension. Misalignment has a pronounced influence on the radial velocity profile downstream the double-swirler outlet. The radial velocity around the axial location of X/D=0.5 is converted into peak and positive value when misaligned dimension is larger than 0.5mm.
-
[1] Nikjooy M, Mongia H C, Samuelsen G S, et al.A numerical and experimental study of confined swirling jets[R].AIAA 89-2898, 1989. [2] Lefebvre A H.Gas turbine combustion[M].3th ed.Boca Raton, FL, USA:CRC Press, 2010. [3] McDonell V G, Arellao L, Lee S W, et al.Effect of hardware alignment of fuel distribution and combustion performance for a production engine fuel injection assembly[R].Naples, Italy:26th International Symposium on Combustion, 1996. [4] Ateshkadi A, McDonel V G, Samuelsen G S.Effect of hardware geometry on gas and drop behavior in a radial mixer spray[R].Pittsburgh, PA, USA:27th International Symposium on Combustion, 1998. [5] Jeng S M, Flohre N M, Mongia H C.Airtemperature effects on non-reacting spray characteristics issued from a counter-rotating swirler[R].AIAA-2005-355, 2005. [6] FU Yongqiang, CAI Jun, Jeng S M, et al.Confinement effects on the swirling flow of a counter-rotating swirl cup[R].ASME Paper GT2005-68622, 2005. [7] CAI Jun, FU Yongqiang, Flohre N M, et al.Experimental study on coherent structures of a counter-rotating multi-swirler cup[R].AIAA-2007-5674, 2007. [8] Turek L J, Dawson R W, Chaos M, et al.An investigation of the effect of swirl vane angle on fuel concentration and velocity fields in gas turbine mixers[R].ASME Paper GT2005-68152, 2005. [9] Reddy A P, Sujith R I, Chakravarthy S R.Swirler flow field characteristic in a sudden expansion combustor geometry[R].Journal of Propulsion and Power, 2006, 22, (4):800-808. [10] 党新宪, 赵坚行, 张欣, 等.应用PIV技术测试模型环形燃烧室流场[J].航空动力学报, 2009, 24(7):1470-1475. DANG Xinxian, ZHAO Jianxing, ZHANG Xin, et al.Measurements of the flow fields in a model annular combustor using particle image velocimetry[J].Journal of Aerospace Power, 2009, 24(7):1470-1475.(in Chinese) [11] FU Yongqiang, CAI Jun, Jeng S M.Characteristics of the swirling flow generated by a counter-rotating swirler[R].AIAA-2007-5690, 2007. [12] 林宇震, 许全宏, 刘高恩.燃气轮机燃烧室[M].北京:国防工业出版社, 2008. [13] Syred N, Beer J M.Combustion in swirling flows:a review[J].Combustion and Flame, 1974L:143-201. [14] Adrian S, Hollis D, Carrote J.PIV Measurementsof combustor turbulence fields[R].ASME Paper GT2007-28050, 2007. [15] Ramos J I, Somert H T.Swirling flow in a research combustor[R].AIAA Journal, 1985, 23(2):241-248. [16] Rosfjord T J, Russell S.Nozzle design and manufacturing influences on fuel spray circumferential uniformity[J].Journal of Propulsion and Power, 1989, 5(2):144-150. [17] Rosfjord T J, Eckerle W A.Aerating fuel nozzle design influence on airflow features[J].Journal of Propulsion and Power, 1991, 7(6):849-856. [18] Cohen J M, Rosfjord T J.Influences on the sprays formed by high-shear fuel nozzle/swirler assemblies[J].Journal of Propulsion and Power, 1993, 9(1):16-27.
点击查看大图
计量
- 文章访问数: 1005
- HTML浏览量: 2
- PDF量: 823
- 被引次数: 0