1. 西北工业大学 无人系统技术研究院,西安,710072
2. 西北工业大学 翼型叶栅空气动力学国家级重点实验室,西安,710072
吕文豪(2001—),男,四川成都人,硕士,研究方向:流动控制. E-mail:lvwenhao@mail.nwpu.edu.cn
郝礼书*(1980—),男,博士,副教授. E-mail:haolishu@nwpu.edu.cn
纸质出版:2024
移动端阅览
吕文豪, 张智昊, 郝礼书, 等. 可调缝道构型对翼型气动特性的影响[J]. 空气动力学学报, 2024, 42(6): 76−87.
LYU Wenhao, ZHANG Zhihao, HAO Lishu, et al. The influence of adjustable slot configuration on aerodynamic characteristics of airfoil[J]. 2024, 42(6): 76-87.
吕文豪, 张智昊, 郝礼书, 等. 可调缝道构型对翼型气动特性的影响[J]. 空气动力学学报, 2024, 42(6): 76−87. DOI: 10.7638/kqdlxxb-2023.0166
LYU Wenhao, ZHANG Zhihao, HAO Lishu, et al. The influence of adjustable slot configuration on aerodynamic characteristics of airfoil[J]. 2024, 42(6): 76-87. DOI: 10.7638/kqdlxxb-2023.0166.
翼型开缝是一种抑制翼型吸力面流动分离的被动流动控制技术。为了解决翼型开缝时仅能改善失速特性无法保障小迎角气动特性不被破坏的问题,本文以S809翼型作为研究对象,采用CFD方法进行翼型开缝研究,探究不同缝道参数对翼型气动特性的影响。提出了一种缝道调整方案,通过可调缝道兼顾翼型在小迎角及大迎角时的气动特性。结果表明:1)“基础缝道”构型可大幅改善翼型的失速特性,最大升力系数提高70.8%,达到1.81,失速迎角推迟到21°;2)通过平移或旋转等方式实现了曲线缝道的“梯形”化,实现了缝道的微小调整,得到可维持翼型小迎角气动特性的两种缝道构型;3)利用“基础缝道”和“前翼旋转5°缝道”之间的几何关系,提出了一种可调缝道方案,满足了失速特性大幅改善前提下小迎角气动特性不被破坏的需求。本文所采用的可调缝道研究思路和缝道方案可为翼型开缝技术的工程化应用提供一种参考。
Even though slotted airfoils can effectively inhibit flow separation on the airfoil suction surface and thus improve the aerodynamic performance during stall
they may undermine the aerodynamic performance at small angles of attack. In this paper
we studied the influence of slot parameters on the aerodynamic characteristics of airfoil S809 utilizing CFD (Computational Fluid Dynamics) simulations
with the aim to design an adjustable slot that can realize significant improvement of aerodynamic performance at both small and large angles of attack. Exploiting numerical simulation results yielded a base slot configuration that can considerably improve airfoil’s stall characteristics
with the maximum lift coefficient increased by 70.8% and the stall angle of attack delayed to 21°. By translating and rotating the basic slot configuration
we obtained a trapezoidal curved slot that allows slight adjustment and two slot configurations that can maintain the airfoil’s aerodynamic characteristics at small angles of attack. Moreover
based on the geometric relationship between the basic slot configuration and the one rotated anticlockwise by 5°
we proposed an adjustable slot configuration that can significantly improve the stall characteristics and does not undermine the aerodynamic characteristics at small angles of attack. The proposed adjustable slot configurations shed some lights on designing slotted airfoils.
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