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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
导流装置对受电弓非定常气动特性的影响
牛纪强, 周丹, 梁习锋, 贾丽荣
中南大学 轨道交通安全教育部重点实验室,湖南 长沙 410075
Influence of diversion device on unsteady aerodynamic performance of pantograph
NIU Ji-qiang, ZHOU Dan, LIANG Xi-feng, JIA Li-rong
Key Laboratory of Traffic Safety on Track, Ministry of Education, Central South University, Changsha 410075, China
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摘要：

采用基于Spalart-Allmaras（S-A）湍流模型的延时分离涡方法（DDES）对不同形式导流装置的列车非定常气动特性进行模拟,对比分析不同导流装置下受电弓各构件非定常气动力及波动特性,该算法经过了风洞验证.研究结果表明,浴盆式导流装置显著影响了受电弓及周围流场结构.无侧滑角时,翼板式改善了受电弓阻力系数及波动特性；存在侧滑角时,导流装置会恶化受电弓各构件的气动性能.侧滑角改变了受电弓部分构件的升力方向,导流装置在改变受电弓各构件升力效果方面差异明显.导流装置在改变受电弓各构件气动力频谱特性方面存在明显差异,不合适的导流装置会加剧受电弓气动力波动,而翼板式导流装置对受电弓气动力波动强度有相对较好的改善作用.
Abstract:

Unsteady aerodynamic characteristics of train with different diversion devices were simulated by delayed detached eddy simulation (DDES) method based on Spalart-Allmaras (S-A) turbulence model. Both the unsteady aerodynamic force of each pantograph components and its fluctuation characteristic were compared and analyzed. The numerical calculation method was verified by wind tunnel test. Results showed that both pantograph surface pressure distribution and flow structure around pantograph were significantly affected by bath typed diversion devices. The unsteady drag coefficient of pantograph and its spectral characteristics were improved by wing plate typed diversion device for the case of no sideslip angle. Aerodynamic performance of pantograph components was worsened by diversion devices for the case of sideslip angle. Lift force direction of some pantograph components was changed by sideslip angle. There were obvious differences among the effect of different diversion devices on lift of pantograph components. Some differences were found in the effect of different diversion devices on spectral characteristics of pantograph components, and the inappropriate diversion device would aggravate the fluctuation of the pantograph. The wing plate typed diversion device decreased the fluctuation of the aerodynamic force of the pantograph.
出版日期: 2017-04-25
CLC:  U 266  
基金资助:

国家自然科学基金资助项目（U1534210, U1334205, 11372360）；湖南省自然基金资助项目（14JJ1003, 14JJ3028）；湖南省研究生科研创新资助项目（CX2015B046）；中南大学创新驱动资助项目（2015CX003）；中国铁路总公司科技研究开发计划资助项目（2016T004-A, 2016T004-C）.
通讯作者: 梁习锋，男，教授. ORCID: 0000-0002-7396-1123.     E-mail: gszxlxf@163.com
作者简介: 牛纪强 (1988—)，男，博士生，从事列车空气动力学的研究. ORCID: 0000-0002-0768-0788. E-mail: jiqiang_niu@163.com
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牛纪强, 周丹, 梁习锋, 贾丽荣. 导流装置对受电弓非定常气动特性的影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2017.04.016.

NIU Ji-qiang, ZHOU Dan, LIANG Xi-feng, JIA Li-rong. Influence of diversion device on unsteady aerodynamic performance of pantograph. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2017.04.016.

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