Reasonable size estimation of the binary end plates of a segmental model
BAI Hua1， LIU Boxiang1， JI Naichuan2， LI Jiawu1
1.School of Highway, Chang’an University， Xi’an 710064,China；
2.Shaanxi Provincial Transport Planning Design and Research Institute, Xi’an 710065,China
Abstract：In order to ensure the flow field around the segment model to meet the two-dimensional flow characteristics, it is necessary to set end plate to reduce the influence of the end effect. In the past, the setting of end plate size was mostly based on experience and lack of quantitative basis, Therefore, a method was proposed to estimate the reasonable size of the two-dimensional end plate of the segmental model. The two-dimensional flow field of the test section was calculated by numerical simulation, and the dimensionless dynamic pressure difference distribution function F(x,y) at different positions of the section was obtained. At the same time, the correction coefficient K was introduced to consider the influence of position spacing on the end effect. On this basis, the parameters P(x,y) which effected the influence of the three-dimensional flow around the (x,y) position on the aerodynamic force of the model was proposed. The larger the value is, the more serious the influence of end flow is. According to the results of wind tunnel test and numerical simulation, when the width direction of the model is 10 and the height direction of the model is 15, the size of the end plate can ensure that the end effect is completely eliminated. From this value, the reasonable size of the end plate can be calculated. The effectiveness of this method is verified by wind tunnel test. The method in this paper can provide a reference for the quantitative determination of the reasonable size of the binary end plate.
收稿日期: 2021-09-15
出版日期: 2023-01-28
引用本文:
白桦1，刘博祥1，姬乃川2，李加武1. 节段模型二元端板合理尺寸估算方法[J]. 振动与冲击, 2023, 42(2): 312-320.
BAI Hua1， LIU Boxiang1， JI Naichuan2， LI Jiawu1. Reasonable size estimation of the binary end plates of a segmental model. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(2): 312-320.
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