环形扩压叶栅流动非定常控制方法的PIV研究

弓志强; 陆亚钧; 葛敬东

环形扩压叶栅流动非定常控制方法的PIV研究

北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室, 北京 100083

计量
- 文章访问数: 1513
- HTML浏览量: 12
- PDF量: 476
- 被引次数: 0
出版历程
- 收稿日期: 2005-06-08
- 修回日期: 2005-10-28
- 刊出日期: 2006-06-28

Investigation of Unsteady Flow Control in an Annular Compressor Cascade Using PIV

National Key Laboratory on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 利用合成射流发生器对于一台环形扩压叶栅进行了流动主动控制的探索,发现适当的非定常激励方式可以使得环形叶栅的总压损失明显减小。同时利用二维粒子图像测速仪(ParticleImageVelocimetry,简称PIV)测量了扩压叶片绕流流场。获得了不同攻角下,在不同的激励频率和激励强度下,流场结构的变化。结果表明非定常激励可以使叶片绕流流场结构发生明显变化。在合适的非定常激励下,扩压叶片的叶背分离流动得到明显抑制,尾迹漩涡的强度和尾迹宽度均明显减小,流线分布比无非定常激励时更加平滑。实验结果能够与环形叶栅时均总压损失的变化相吻合。对于这一非定常控制方法的作用机理也进行了初步的分析。
- 航空、航天推进系统 /
- 环形扩压叶栅 /
- 合成射流 /
- 流动控制 /
- 非定常流动 /
- 粒子图像测速仪(PIV)
Abstract: A synthetic jet generator was used as an active control method to control the flow in an annular compressor cascade.It was found that the total pressure loss of the cascade could be reduced effectively.2D Particle Image Velocimetry(PIV) was used to measure the flow field around the blades.Flow fields were acquired under different incidences,jet frequencies and intensities.It was found that synthetic jet had huge impact on the flow field.With proper jet frequency and intensity,flow separation on the blade suction surface was suppressed evidently,and the blade wake intensity and width were reduced.Streamlines around the blade were smoother.These changes were consistent with the decrease of total pressure loss.The mechanism of this active control method was analyzed.
- aerospace propulsion system /
- annular compressor cascade /
- synthetic jet /
- flow control /
- unsteady flow /
- Particle Image Velocimetry(PIV)

HTML

参考文献(6)

[1]	Ahuja K K,Burrin R H.Control of Separation by Sound[R].AIAA-84-2298,1984.
[2]	McManus K,Magill J.Airfoil Performance Enhancement Using Pulsed Jet Separation Control[R].AIAA-97-1971,1997.
[3]	钟芳源,董国平,罗次申.扰动来流下声控机翼分离流动的研究[J].航空动力学报,1998,13(2):113～118.Zhong Fang-yuan,Dong Guo-ping,Luo Ci-shen.Acoustic Control of Separated Flow over a 2-Dimensional Airfoil at Disturbed Incoming Flow[J].Journal of Aerospace Power,1998,13(2):113～118.
[4]	闻学,李志平,周海,葛敬东.对环形叶栅内非定常流动特征参数的实验研究[J].航空动力学报,2002,17(5):561～566.Wen Xue,Li Zhiping,Zhou Hai,Ge Jingdong.Research of the Unsteady-Fluid Characteristic Parameter in an Annular Cascade[J].Journal of Aerospace Power,2002,17 (5):561 ～566.
[5]	邱亚希,葛敬东,周海,陆亚钧.环形叶栅内利用非定常激励减少分离区损失的研究[J].流体力学实验与测量,2003,17(1):18～23.Qiu Yaxi,Ge Jingdong,Zhou Hai,Lu Yajun.Research on the Effects of Unsteady Excitation on Enhancing Performance of Annular Cascade[J].Experiments and Measurements in Fluid Mechanics,2003,17(1):18～23.
[6]	刘宝杰,严明,刘胤,王同庆.跨音风扇转子尖部非定常流场的PIV初步测量[J].航空动力学报,2001,16(2):147～152.Liu Baojie,Yan Ming,Liu Yin,Wang Tongqing.Preliminary PIV Measurement of Unsteady Tip Flow in a Transonic Fan Rotor[J].Journal of Aerospace Power,2001,16 (2):147 ～152.