非定常尾迹对复合角度动叶气膜冷却效率的数值研究
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摘要
采用标准k-ε湍流模型及SIMPLE算法,通过d=2 mm、4 mm和6 mm的圆柱来模拟燃气轮机静叶产生的尾迹,研究了不同时刻三种尾迹宽度对下游复合角度动叶冷却效率的影响。结果表明:不同尾迹宽度对下游动叶压力面和吸力面涡量呈现周期性的影响,而对压力面的影响更显著;一个周期内压力面冷却效率在3/4T时刻最小,而吸力面冷却效率没有明显变化;随着复合角度的增大,压力面冷却效果增强,吸力面冷却效果减弱;尾迹宽度对吸力面冷却效率影响很小,而对压力面影响较大,尾迹宽度为4 mm时的冷却效率要高于2 mm和6 mm的冷却效率。
The influence of three different unsteady wake width on the blade film cooling efficiency is discussed in different time. Standard k-ε turblence model and SIMPLE algorithm are applied and that static blades produce wakes is simulated through altering the cylinder diameter d = 2mm、d = 4mm and d = 6mm respectively.Results show that blade pressure side and suction side vorticity periodic impact under different width of the unsteady wakes. while make the suction surface influence more significant. Pressure side of one cycle cooling efficiency in 3/4 time is minimal. while there is a little influence on the suction surface,with the increase of angle degree,film cooling efficiency of the pressure surface is increase.The suction surface's is declining.Along with the enlargement of the wake width,Wake width have great influence on the pressure surface cooling efficiency,the cooling efficiency of Wake width( 4 mm) is higher than that 2 mm and 6 mm,while there is a little influence on the suction surface.
The influence of three different unsteady wake width on the blade film cooling efficiency is discussed in different time. Standard k-ε turblence model and SIMPLE algorithm are applied and that static blades produce wakes is simulated through altering the cylinder diameter d = 2mm、d = 4mm and d = 6mm respectively.Results show that blade pressure side and suction side vorticity periodic impact under different width of the unsteady wakes. while make the suction surface influence more significant. Pressure side of one cycle cooling efficiency in 3/4 time is minimal. while there is a little influence on the suction surface,with the increase of angle degree,film cooling efficiency of the pressure surface is increase.The suction surface's is declining.Along with the enlargement of the wake width,Wake width have great influence on the pressure surface cooling efficiency,the cooling efficiency of Wake width( 4 mm) is higher than that 2 mm and 6 mm,while there is a little influence on the suction surface.
引文
[1]曹玉璋,陶智,徐国强.航空发动机传热学[M].北京:北京航空航天大学出版社,2005.
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[3]F.Montomoli,M.Massini,P.Adami.Effect of incidence angle with wake passing on a film cooled leading edge:a numerical study.International Journal for Numerical Methods in Fluids,2010,63(12):1359-1374.
[4]M.Shantanu,H.Je-Chin.Effect of unsteady wake on full coverage film cooling effectiveness for a gas turbine blade[R].2006,AIAA Paper,AIAA,2006:2006-3403.
[5]袁锋,吴亚东,竺晓程,等.旋转对涡轮叶片气膜冷却影响的数值模拟[J].动力工程,2007,27(2):161-164.
[6]刘波,蔡元虎,曹志鹏,等.叶栅流场尾迹中非定常涡系的数值模拟[J].西北工业大学学报.2005,23(5):562-566.
[7]杨琳,邹正平,李维,等.尾迹作用下不同负荷分布叶型边界层发展研究[J].工程热物理学报,2006,27(5):751-753.
[8]周莉,韦威,蔡元虎.非定常尾迹输运对动叶气膜冷却流场影响[J].航空动力学报,2012,27(8):1696-1703.
[9]周莉,张鑫,蔡元虎.非定常环境下动叶气膜冷却流场的数值模拟[J].航空动力学报,2011,26(8):1695-1701.
[10]周莉,张鑫,蔡元虎.非定常尾迹宽度对气膜冷却效果的影响[J].中国电机工程学报.2011,31(29):97-102.
[11]王梅丽.非定常尾迹对动叶传热特性影响的数值分析[D].吉林:东北电力大学.2011.
[12]郭婷婷,王成荫,冯博.非定常尾迹对旋转叶栅影响的数值研究[J].电站系统工程.2010,26(2):12-14.
[13]宋东辉,刘建红,郭婷婷,等.倾斜入射的横向紊动射流温度场的数值模拟[J].东北电力大学学报,2007,27(2):1-5.
[14]李少华,王成荫,吴殿文,等.非定常尾迹对叶栅温度影响的数值研究[J].东北电力大学学报,2010,30(2):59-62.
[15]蒋雪辉,赵晓路.非定常尾迹对叶栅气膜冷却效率的影响[J].推进技术,2004,25(4):311-315.
[2]H J Chin,D Sandip,E Srinate V.燃气轮机传热和冷却技术[M].程代京,谢永慧,译.西安:西安交通大学出版社,2005.
[3]F.Montomoli,M.Massini,P.Adami.Effect of incidence angle with wake passing on a film cooled leading edge:a numerical study.International Journal for Numerical Methods in Fluids,2010,63(12):1359-1374.
[4]M.Shantanu,H.Je-Chin.Effect of unsteady wake on full coverage film cooling effectiveness for a gas turbine blade[R].2006,AIAA Paper,AIAA,2006:2006-3403.
[5]袁锋,吴亚东,竺晓程,等.旋转对涡轮叶片气膜冷却影响的数值模拟[J].动力工程,2007,27(2):161-164.
[6]刘波,蔡元虎,曹志鹏,等.叶栅流场尾迹中非定常涡系的数值模拟[J].西北工业大学学报.2005,23(5):562-566.
[7]杨琳,邹正平,李维,等.尾迹作用下不同负荷分布叶型边界层发展研究[J].工程热物理学报,2006,27(5):751-753.
[8]周莉,韦威,蔡元虎.非定常尾迹输运对动叶气膜冷却流场影响[J].航空动力学报,2012,27(8):1696-1703.
[9]周莉,张鑫,蔡元虎.非定常环境下动叶气膜冷却流场的数值模拟[J].航空动力学报,2011,26(8):1695-1701.
[10]周莉,张鑫,蔡元虎.非定常尾迹宽度对气膜冷却效果的影响[J].中国电机工程学报.2011,31(29):97-102.
[11]王梅丽.非定常尾迹对动叶传热特性影响的数值分析[D].吉林:东北电力大学.2011.
[12]郭婷婷,王成荫,冯博.非定常尾迹对旋转叶栅影响的数值研究[J].电站系统工程.2010,26(2):12-14.
[13]宋东辉,刘建红,郭婷婷,等.倾斜入射的横向紊动射流温度场的数值模拟[J].东北电力大学学报,2007,27(2):1-5.
[14]李少华,王成荫,吴殿文,等.非定常尾迹对叶栅温度影响的数值研究[J].东北电力大学学报,2010,30(2):59-62.
[15]蒋雪辉,赵晓路.非定常尾迹对叶栅气膜冷却效率的影响[J].推进技术,2004,25(4):311-315.