| 平流层飞艇气动阻力的数值模拟及公式拟合 |
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| 引用本文： | 李天娥, 孙晓颖, 张中昱, 林国昌. 平流层飞艇气动阻力的数值模拟及公式拟合[J]. 工程力学, 2017, 34(8): 249-256. DOI: 10.6052/j.issn.1000-4750.2016.03.0217 |
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| 作者姓名： | 李天娥 孙晓颖 张中昱 林国昌 |
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| 作者单位： | 1.哈尔滨工业大学, 结构工程灾变与控制教育部重点试验室, 哈尔滨 150090;;2.北京交通大学, 结构风工程与城市风环境北京市重点试验室, 北京 100044;;3.哈尔滨工业大学, 国防科技重点实验室, 哈尔滨 150090 |
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| 基金项目： | 国家自然科学基金项目（51678192） |
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| 摘 要： | 该文以某中间有圆柱段的平流层飞艇为研究对象，在验证数值模拟方法的基础上，分析了尾翼、长细比、高度及雷诺数对飞艇气动阻力的影响。基于参数分析，采用TableCurve3D软件拟合给出了该艇型在水平姿态下的气动阻力系数估算公式，且给出攻角对公式的修正。研究表明：水平姿态下，平均风压系数沿着艇体头部逐渐减小，中间圆柱段保持稳定，沿着尾部逐渐增加；沿着艇体方向，风压系数曲线斜率拐点出现在各段连接附近。尾翼及艇体对阻力系数的贡献值随着俯仰角的增大而增加，但艇体是主要的贡献者；气动阻力系数随着长细比和高度的增加呈现先减小后增加趋势，随着Re数（1.0×107~2.0×108）的增加而递减。
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| 关 键 词： | 平流层飞艇 气动阻力 数值模拟 TableCurve3D 公式拟合 |
| 收稿时间： | 2016-03-28 |
| 修稿时间： | 2016-10-17 |
NUMERICAL SIMULATION AND FORMULA FITTING OF AERODYNAMIC DRAG FORCE OF STRATOSPHERE AIRSHIP |
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| LI Tian-e, SUN Xiao-ying, ZHANG Zhong-yu, LIN Guo-chang. NUMERICAL SIMULATION AND FORMULA FITTING OF AERODYNAMIC DRAG FORCE OF STRATOSPHERE AIRSHIP[J]. Engineering Mechanics, 2017, 34(8): 249-256. DOI: 10.6052/j.issn.1000-4750.2016.03.0217 |
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| Authors: | LI Tian-e SUN Xiao-ying ZHANG Zhong-yu LIN Guo-chang |
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| Affiliation: | 1.Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;;2.Beijing's Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing 100044, China;;3.Key Laboratory of Science and Technology for National Defense, Harbin Institute of Technology, Harbin 150090, China |
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| Abstract: | A stratosphere airship with cylindrical sections in its middle was taken as a research object, the influence of fins, slenderness ratio, height and Re on aerodynamic drag force were studied by the verification of simulation method. Based on the parameter analysis, the estimating formula of aerodynamic drag coefficients under horizontal conditions was obtained using TableCurve3D software. What is more, a modified formula considering attack angles was also presented. The study demonstrates that mean wind-pressure coefficients decrease along the hull head, keep stable in the middle cylindrical section, and increase along the tail section. The curvature inflections of pressure-coefficients curves appear near the junctions of different sections. The contributive value of fins and hull to aerodynamic drag coefficients increases with the increase of attack angles, but hull is the main contributor. As the slenderness ratio or height increases, the aerodynamic drag coefficient decreases first and then increases. A decrease trend is presented with the increase of Re (1.0×107~2.0×108). |
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| Keywords: | stratosphere airship aerodynamic drag force numerical simulation TableCurve3D formula fitting |
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