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Effect of Plane Walls on Flow Characteristics of Primary Jets Controlled by Secondary Flow |
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| รหัสดีโอไอ | |
| Creator | 1. H. Tezuka 2. K. Yabu 3. K. Nishibe 4. D. Kang 5. K. Sato |
| Title | Effect of Plane Walls on Flow Characteristics of Primary Jets Controlled by Secondary Flow |
| Publisher | Thai Society of Mechanical Engineers (TSME) |
| Publication Year | 2567 |
| Journal Title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| Journal Vol. | 12 |
| Journal No. | 2 |
| Page no. | JRAME-24-12-024 (p.1-7) |
| Keyword | Jet vectoring, Coanda effect, Secondary flow, Wall boundaries, Offset ratio |
| URL Website | https://ph01.tci-thaijo.org/index.php/jrame/index |
| Website title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| ISSN | 2229-2152 |
| Abstract | The method for controlling the direction of primary jets by secondary flow is called fluid thrust vectoring. It was originally studied for application in aircraft attitude control, where it was expected to reduce fuel consumption and improve motion performance. It has been demonstrated that the direction of the primary jet can be adjusted by adjusting the momentum of the secondary flow generated near a curved surface (Coanda surface), such as a cylinder. However, there is limited research applying the abovementioned method to fields such as aviation for flows other than external flows. To use this method for internal flows, such as airflow control in a room, knowledge of the geometric boundaries near the jet flow is required. That is, the interference problem between the jet and wall boundaries must be investigated to realize jet direction control using secondary flows in various fields. Thus, this study investigated the effects of wall length and step height (offset ratio) on the flow characteristics of jets controlled by secondary flow near the Coanda surface. Typical flow patterns are presented in this paper, and the jet deflection characteristics are discussed primarily through flow visualization and velocity distribution measurements. |
