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Effect of the trailing-edge flap on tones due to self-excited oscillation within the leading-edge slat cove

文献类型：期刊论文

作者Lu WS(陆维爽); Liu, Peiqing3,4; Guo, Hao3,4
刊名PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
出版日期2022-07-03
关键词high-lift device leading-edge slat aerodynamic noise acoustic characteristics trailing-edge flap
ISSN号0954-4100
DOI10.1177/09544100221111305
英文摘要To study the tonal noise characteristics of the leading-edge slat of high-lift configurations with and without a deployed trailing-edge flap, experiments are conducted in the D5 aero-acoustic wind tunnel at Beihang University. The numerical simulation method is used to obtain the necessary flow information. The experimental results show that low to mid frequency tonal noise generated by self-excited oscillation within the slat cove is dominant and its corresponding frequencies are basically unchanged whether the flap is deployed or not. However, the primary mode of self-excited oscillation within the slat cove switches to a higher one when the flap is deployed. Further analysis results demonstrate that variation of the primary mode is found to be closely related to the flow characteristics in the self-excited oscillation feedback loop. The number of the primary mode is generally proportional to the ratio between the vortex shedding frequency and the self-excited oscillation frequency. The flap being deployed results in an increase in the effective angle of attack of both the main wing and slat, which leads to a thinner separating boundary layer, thus increasing further the vortex shedding frequency and this ratio.
学科主题Engineering, Aerospace ; Engineering, Mechanical
分类号Q4
语种英语
WOS记录号WOS:000824775700001
资助机构National Natural Science Foundation of China [11502012, 11850410440, 11772033, 11721202]
其他责任者Guo, H (corresponding author), Beihang Univ, Inst Fluid Mech, Beijing 100191, Peoples R China.
源URL[http://dspace.imech.ac.cn/handle/311007/90216]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位1.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China
2.Beihang Univ, Sch Aeronautic Sci & Engn, Beijing, Peoples R China
3.Beihang Univ, Minist Educ, Key Lab Fluid Mech, Beijing, Peoples R China
4.Beihang Univ, Minist Ind & Informat Technol, Key Lab Aeroacoust, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Lu WS,Liu, Peiqing,Guo, Hao. Effect of the trailing-edge flap on tones due to self-excited oscillation within the leading-edge slat cove[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING,2022.
APA 陆维爽,Liu, Peiqing,&Guo, Hao.(2022).Effect of the trailing-edge flap on tones due to self-excited oscillation within the leading-edge slat cove.PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING.
MLA 陆维爽,et al."Effect of the trailing-edge flap on tones due to self-excited oscillation within the leading-edge slat cove".PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING (2022).

入库方式： OAI收割

来源：力学研究所

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