基于等Weber数的结冰外形修正

易贤; 郭龙; 周志宏; 杜雁霞; 朱国林

doi:10.7638/kqdlxxb-2016.0039

基于等Weber数的结冰外形修正

1.
中国空气动力研究与发展中心空气动力学国家重点实验室, 四川绵阳 621000
2. 四川大学工程力学系, 四川成都 610065

基金项目: 国家自然科学基金（11172314，11472296）；国家重点基础研究发展计划（2015CB755800）

详细信息

作者简介:
易贤(1977-),男,四川省金堂县人,研究员,研究方向:飞机结冰.E-mail:yixian_2000@163.com

通讯作者:
周志宏(1981-),男,湖南涟源人,副研究员,研究方向:飞机结冰.E-mail:zzhng@163.com

中图分类号: V211.3
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出版历程
- 收稿日期: 2016-01-27
- 修回日期: 2016-02-01
- 网络出版日期: 2021-01-07
- 刊出日期: 2016-12-24

Ice shape modification based on constant Weber number

1.
State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China
2. Department of Engineering Mechanics, Sichuan University, Chengdu 610065, China

摘要

摘要: 由于设备条件的限制，在进行结冰风洞试验时，试验Weber数与目标Weber数往往存在差异，为了获得与目标Weber数对应的冰形，需要对试验结果进行修正。本文分析了进行Weber数修正的原因，提出了根据几何特征量进行结冰外形修正的方法，并以某超临界翼型为对象，对不同Weber条件下的结冰外形进行了仿真，研究了Weber数变化对结冰的影响规律，在此基础上开展了基于等Weber数的结冰外形修正。研究发现：（1）Weber数主要影响冰角特征，对水滴收集特性、结冰极限及驻点冰厚度影响较小；（2）存在一个敏感Weber数，低于敏感值时，Weber数变化对结冰影响不大，当Weber数高于敏感值时，Weber数变化对结冰有明显影响；（3）采用本文提出的冰形修正方法，能保证冰形的宏观轮廓与目标冰形一致，修正后的冰形能适量消除由于Weber数误差导致的冰形差异，提高试验的精度。
- 飞机结冰 /
- Weber数 /
- 冰形修正 /
- 结冰风洞 /
- 结冰相似准则 /
- 结冰试验 /
- 飞行安全
Abstract: The Weber number in an icing wind tunnel test is often different from that of the real flight icing condition due to the limitation of facility capacity. In order to obtain consistent result of aimed Weber number, the test ice shape need to be modified. The reason of icing test data correction is analyzed in this paper. A method for ice shape modification based on the ice geometric features is proposed. The ice shape of a supercritical airfoil is simulated under the condition of different Weber number, and the effect of Weber number on icing is studied. Then the ice shape modification based on constant Weber number is carried out. It is found that:(1) The Weber number mainly affects ice horns, and has little influence on droplet collection, icing limit and thickness; (2) There is a sensitive value existed, as the Weber number changes smaller than the value ice varies little, while the Weber number is bigger than the value, ice will vary obviously according to the change of this Weber number; (3) The proposed ice modification method can guarantee the agreement between the modified and the target ice shape, so the ice shape differences caused by Weber number differences can be amount to eliminated, and the precision of test will be improved.
- aircraft icing /
- Weber number /
- ice shape modification /
- icing wind tunnel /
- icing scaling law /
- icing test /
- flight safety

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参考文献(15)

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