| 非定常压力测量中信号失真的管传递函数修正方法 |
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| 引用本文： | 杨慧,西姆斯-威廉姆斯·戴维,何力. 非定常压力测量中信号失真的管传递函数修正方法[J]. 实验流体力学, 2007, 21(3): 70-75. DOI: 10.3969/j.issn.1672-9897.2007.03.015 |
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| 作者姓名： | 杨慧 西姆斯-威廉姆斯·戴维 何力 |
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| 作者单位： | 北京航空航天大学航空发动机数值仿真研究中心,北京,100083;英国达勒姆大学工程学院,英国,达勒姆,DH1,3LE |
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| 摘 要： | 使用外置压力传感器测量非定常压力会造成非定常测量信号失真. 这是由连接外置传感器和测点之间的管道传压系统引成的. 阐述了一种修正这种非定常信号失真的方法.从而使得运用外置传感器测量非定常压力成为可能.这种技术使用已知的管传递函数在频域中修正非定常测量信号的失真. 同时修正失真信号振幅的变化和相位角的偏移.给出了这种修正技术的运用实例:在叶轮机颤振试验中测量叶片表面非定常压力和在非定常旋涡脱落试验中测量尾迹.
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| 关 键 词： | 非定常压力测量 管传递函数修正技术 外置压力传感器 叶轮机叶片颤振 非定常旋涡脱落 尾迹测量 |
| 文章编号： | 1672-9897（2007）03-0070-06 |
| 修稿时间： | 2006-11-09 |
Tubing-transfer-function correction on signal distortion for unsteady pressure measurements |
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| YANG Hui,D. B. SIMS-WILLIAMS,HE Li. Tubing-transfer-function correction on signal distortion for unsteady pressure measurements[J]. Experiments and Measur in Fluid Mechanics, 2007, 21(3): 70-75. DOI: 10.3969/j.issn.1672-9897.2007.03.015 |
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| Authors: | YANG Hui D. B. SIMS-WILLIAMS HE Li |
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| Affiliation: | 1. Aero-engine Numerical Simulation Research Center, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; 2. School of Engineering, University of Durham, Durham DHI 3LE, UK |
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| Abstract: | A method of correcting distortion in the measured unsteady pressures using a tubing system and off-board pressure transducers is described.This technique involves the using of the frequency domain correction with a known TubingTransfer-Function(TTF).The advantage of this method not only corrects the amplitude distortion but also eliminates the phase shift.The technique is verified in an unsteady surface pressure measurement of a turbomachinery blade flutter test and for wake measurements of a vortex shedding case. |
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| Keywords: | unsteady pressure measurement tubing-transfer-function correction technique off-board pressure transducer turbomachinery blade flutter unsteady vortex shedding wake measurements |
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