Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration
The vortex system on the SACCON model is studied under low Reynolds number by using the flow visualization technique and the surface pressure testing measurement in a low-speed water channel and a wind tunnel, respectively. A main topic is discussed below. The blunt leading-edge section on this SACC...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2023-04-01
|
| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/18/1/18_2023jfst0012/_pdf/-char/en |
| _version_ | 1797835617669742592 |
|---|---|
| author | Yu-Hsin CHEN Jiun-Jih MIAU Yen-Po CHEN Yng-Ru CHEN |
| author_facet | Yu-Hsin CHEN Jiun-Jih MIAU Yen-Po CHEN Yng-Ru CHEN |
| author_sort | Yu-Hsin CHEN |
| collection | DOAJ |
| description | The vortex system on the SACCON model is studied under low Reynolds number by using the flow visualization technique and the surface pressure testing measurement in a low-speed water channel and a wind tunnel, respectively. A main topic is discussed below. The blunt leading-edge section on this SACCON model induces various flow phenomena under different angles of attack. The attached flow appearing around the upstream leading-edge region at a low angle of attack induces different flow phenomena downstream, so does the branched vortices appearing near the trailing-edge. Although this attached flow is vanished at higher angle of attack, the stability of forming an outboard vortex can be shown in the results of pressure coefficients as a function of an angle of attack. Moreover, how the blunt leading-edge contour on SACCON model and other models affecting flow field can be compared with the findings given in the previous studies. The models with only blunt leading-edge contour can prompt an outboard vortex and an inner vortex, compared to the flow fields on the models with spanwise-varying leading-edge contours. This inner vortex is formed due to the attached flow inboard passing downstream and being affected by the outboard vortex. However, this attached flow is different from the attached flow observed on SACCON model. Therefore, flow phenomena occurring on different blunt leading-edge models can be differentiated. |
| first_indexed | 2024-04-09T14:56:31Z |
| format | Article |
| id | doaj.art-8a3f6f21bc194636b0e986ea11fa92d6 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-04-09T14:56:31Z |
| publishDate | 2023-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-8a3f6f21bc194636b0e986ea11fa92d62023-05-02T04:54:02ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582023-04-01181JFST0012JFST001210.1299/jfst.2023jfst0012jfstBlunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configurationYu-Hsin CHEN0Jiun-Jih MIAU1Yen-Po CHEN2Yng-Ru CHEN3Department of Aeronautics and Astronautics, College of Engineering, National Cheng Kung UniversityDepartment of Aeronautics and Astronautics, College of Engineering, National Cheng Kung UniversityDepartment of Aeronautics and Astronautics, College of Engineering, National Cheng Kung UniversityDepartment of Aeronautics and Astronautics, College of Engineering, National Cheng Kung UniversityThe vortex system on the SACCON model is studied under low Reynolds number by using the flow visualization technique and the surface pressure testing measurement in a low-speed water channel and a wind tunnel, respectively. A main topic is discussed below. The blunt leading-edge section on this SACCON model induces various flow phenomena under different angles of attack. The attached flow appearing around the upstream leading-edge region at a low angle of attack induces different flow phenomena downstream, so does the branched vortices appearing near the trailing-edge. Although this attached flow is vanished at higher angle of attack, the stability of forming an outboard vortex can be shown in the results of pressure coefficients as a function of an angle of attack. Moreover, how the blunt leading-edge contour on SACCON model and other models affecting flow field can be compared with the findings given in the previous studies. The models with only blunt leading-edge contour can prompt an outboard vortex and an inner vortex, compared to the flow fields on the models with spanwise-varying leading-edge contours. This inner vortex is formed due to the attached flow inboard passing downstream and being affected by the outboard vortex. However, this attached flow is different from the attached flow observed on SACCON model. Therefore, flow phenomena occurring on different blunt leading-edge models can be differentiated.https://www.jstage.jst.go.jp/article/jfst/18/1/18_2023jfst0012/_pdf/-char/enunmanned combat aerial vehicle (ucav)stability and control configuration (saccon)spanwise-varying leading-edge contoursblunt leading-edge effectflow visualizationpressure testing measurement |
| spellingShingle | Yu-Hsin CHEN Jiun-Jih MIAU Yen-Po CHEN Yng-Ru CHEN Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration Journal of Fluid Science and Technology unmanned combat aerial vehicle (ucav) stability and control configuration (saccon) spanwise-varying leading-edge contours blunt leading-edge effect flow visualization pressure testing measurement |
| title | Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration |
| title_full | Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration |
| title_fullStr | Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration |
| title_full_unstemmed | Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration |
| title_short | Blunt leading-edge effect on spanwise-varying leading-edge contours of an UCAV configuration |
| title_sort | blunt leading edge effect on spanwise varying leading edge contours of an ucav configuration |
| topic | unmanned combat aerial vehicle (ucav) stability and control configuration (saccon) spanwise-varying leading-edge contours blunt leading-edge effect flow visualization pressure testing measurement |
| url | https://www.jstage.jst.go.jp/article/jfst/18/1/18_2023jfst0012/_pdf/-char/en |
| work_keys_str_mv | AT yuhsinchen bluntleadingedgeeffectonspanwisevaryingleadingedgecontoursofanucavconfiguration AT jiunjihmiau bluntleadingedgeeffectonspanwisevaryingleadingedgecontoursofanucavconfiguration AT yenpochen bluntleadingedgeeffectonspanwisevaryingleadingedgecontoursofanucavconfiguration AT yngruchen bluntleadingedgeeffectonspanwisevaryingleadingedgecontoursofanucavconfiguration |