| Mu-level法的湍流猝发频率检测技巧 |
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| 引用本文： | 胡海豹,宋保维,黄桥高,刘占一. Mu-level法的湍流猝发频率检测技巧[J]. 航空动力学报, 2009, 24(10): 2169-2175 |
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| 作者姓名： | 胡海豹 宋保维 黄桥高 刘占一 |
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| 作者单位： | 西北工业大学航海学院, 西安 710072 |
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| 基金项目： | 国家自然科学基金，全国优秀博士学位论文基金，西北工业大学科技创新基金 |
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| 摘 要： | 针对mu-level法分析结果易受试验及检测参数影响的问题,详细探讨了该方法用于湍流猝发频率检测的适应性和提高其检测精度的技巧.通过对不同法向检测位置、采样频率、采样时间、门限值L及附加判定条件下湍流猝发频率的检测和对比分析,获取了各因素对湍流猝发频率检测的影响规律,探讨了提高湍流猝发频率检测准确性的可行途径,并总结了一套基于mu-level法的湍流猝发频率四步测试方法(试采样、试分析、采样、检测分析).
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| 关 键 词： | 猝发 条件采样技术 mu-level法 湍流边界层 风洞 |
| 收稿时间： | 2008-10-09 |
| 修稿时间： | 2008-12-09 |
Research about the techniques of burst detection in turbulent boundary layer with the mu-level algorithm |
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| HU Hai-bao,SONG Bao-wei,HUANG Qiao-gao and LIU Zhan-yi. Research about the techniques of burst detection in turbulent boundary layer with the mu-level algorithm[J]. Journal of Aerospace Power, 2009, 24(10): 2169-2175 |
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| Authors: | HU Hai-bao SONG Bao-wei HUANG Qiao-gao LIU Zhan-yi |
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| Affiliation: | School of Marine Engneering, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | In order to resolve the problems that the analysis results of mu-level algorithm were influenced easily by measurement and detection parameters,the adaptability of burst-detection in turbulent boundary layer were researched in detail.Through contrast analysis of vertical testing position,sampling frequency,sampling time,boundary-parameter and accessional determinant condition,the influence rules of above factor on burst-detection were acquired,and feasible approaches to enhance burst frequency veracity in turbulent boundary layer were discussed.Finally,a four-step method of detecting burst frequency with mu-level algorithm(fore-sampling,fore-analysis,sampling,detection analysis) was summarized. |
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| Keywords: | burst conditional sampling techniques mu-level algorithm turbulent boundary layer wind tunnel |
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