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论文:2018,Vol:36,Issue(3):577-581 |
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引用本文： |
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刘艳, 赵柯, 黄江涛. 机械式操纵飞机自动上舵成因分析及气动改善方法[J]. 西北工业大学学报 |
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Liu Yan, Zhao Ke, Huang Jiangtao. Mechanism and Improve Methods of Rudder Lock for Mechanically Controlled Aircraft[J]. Northwestern polytechnical university |
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| 机械式操纵飞机自动上舵成因分析及气动改善方法 |
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| 刘艳1, 赵柯2, 黄江涛3 |
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1. 西北工业大学 航空学院, 陕西 西安 710072;
2. 西安飞机设计研究所, 陕西 西安 710089;
3. 中国空气动力研究与发展中心, 四川 绵阳 621000 |
| 摘要: |
| 自动上舵是威胁飞行安全、适航取证中必须关注的问题。随着机械式操纵、非专业驾驶通用飞机市场的逐渐广阔，自动上舵问题仍具有重要的研究意义。以某中型运输机为例，通过分析其协调侧滑试飞数据及数值模拟流场，对该飞机自动上舵的成因进行了分析。在此基础上，提出了双三角背鳍与降低轴式补偿2种气动改善措施，数值模拟结果表明，前者可有效改善垂尾失速特性，但过强的方向舵前缘涡会导致方向舵压心前移，恶化自动上舵现象；后者虽可有效改善自动上舵现象，但会带来铰链力矩与脚蹬力的增加，需对传动比与调整片进行精细化设计。 |
| 关键词:
自动上舵
流场数值模拟
铰链力矩
机械式操纵
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| Mechanism and Improve Methods of Rudder Lock for Mechanically Controlled Aircraft |
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| Liu Yan1, Zhao Ke2, Huang Jiangtao3 |
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1. College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. AVIC The First Aircraft Institute, Xi'an 710089, China;
3. China Aerodynamics Research and Development Center, Mianyang 621000, China |
| Abstract: |
| Rudder Lock is a threat to flight safety, which should be carefully considered in the airworthiness certification. Since general aircrafts which are equipped with mechanical control system and controlled by unprofessional pilots becomes more and more popular, researches on rudder lock are still necessary. In this paper, a mechanically controlled medium sized transport is studied as an example. By analyzing the steady straight sideslip flight test data and flow field numerical simulation results, the mechanism of rudder lock is analyzed. Two aerodynamic improving methods including double-triangle dorsal fin and reducing set-back hinge balance are proposed. The flow field numerical simulation results show that double triangle dorsal fin can improve the stall characteristic of vertical tail, but the strong vortex will move the center of pressure forward, which worsens the rudder lock. Reducing set-back hinge balance can improve rudder lock effectively, while the hinge moment and rudder force will be increased, therefore the gearing ratio and tab should be carefully designed. |
| Key words:
rudder lock
flow field numerical simulation
hinge moment
mechanically control
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| 收稿日期: 2017-05-20
修回日期:
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| DOI: |
| 通讯作者:
Email： |
| 作者简介: 刘艳(1981-),女,西北工业大学讲师、博士,主要从事飞行动力学与控制研究。
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| 作者相关文章 |
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| 刘艳 在本刊中的所有文章 |
| 赵柯 在本刊中的所有文章 |
| 黄江涛 在本刊中的所有文章 |
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