| 某型民机低速巡航构型平尾抖振特性风洞试验研究 |
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| 引用本文： | 陈震宇,刘洋,徐亮.某型民机低速巡航构型平尾抖振特性风洞试验研究[J].实验流体力学,2021,35(6):94-99. |
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| 作者姓名： | 陈震宇 刘洋 徐亮 |
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| 作者单位： | 中国商用飞机有限责任公司 上海飞机设计研究院，上海 201210 |
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| 摘 要： | 提出一种分析平尾抖振的风洞试验方法，通过在某型常规布局民用客机刚性全模的主翼和平尾表面安装超小型脉动压力传感器，测量并分析了主翼及平尾表面脉动压力的时域与频域数据，得到了在主翼尾流及自身流动特性影响下平尾不同截面的脉动压力特性和表面压力分布特性。结果表明:在中小迎角下，主翼出现强分离流动时产生的随机脉动压力激励会引起平尾结构强迫振动，且平尾表面的脉动压力主频与主翼尾流的脉动压力主频相近。在大迎角下，平尾不再受主翼尾流的干扰，其脉动压力特性与自身的分离特性相关，且沿平尾展向向外脉动压力功率谱密度值逐渐降低。
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| 关 键 词： | 民用客机 平尾 风洞试验 脉动压力 |
| 收稿时间： | 2021-02-04 |
Wind tunnel test investigation on buffeting characteristics of horizontal tail of commercial aircraft in low-speed cruise configuration |
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| Affiliation: | Shanghai Aircraft Design and Research Institute, Commercial Aircraft Corporation of China Ltd., shanghai 201210, China |
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| Abstract: | In this paper, a wind tunnel test method is proposed to analyze the buffeting of the horizontal tail. By installing subminiature pulsating pressure sensors on the wing and horizontal tail surface of a commercial aircraft with conventional layout, the time domain and frequency domain data of the pulsating pressure on the wing and horizontal tail surface are measured and analyzed. The test results show the characteristics of fluctuating pressure and surface pressure distribution under the influence of the wing wake and its own flow characteristics on different sections of the horizontal tail. The results show that the structural forced vibration of the horizontal tail is induced by the random fluctuating pressure excitation generated by the strong separated flow of the wing at medium and small angles of attack, and the dominant frequency of the fluctuating pressure on the horizontal tail surface is close to that of the vortex on the main wing. At large angles of attack, the horizontal tail is no longer disturbed by the wake of the main wing, its fluctuating pressure characteristics are related to its own separation characteristics, and the power spectral density of the fluctuating pressure decreases gradually along the spanwise direction of the horizontal tail. |
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