Effect of Plane Walls on Flow Characteristics of Primary Jets Controlled by Secondary Flow

Article Sidebar

PDF
Published: Jun 16, 2024
Keywords:
Jet vectoring Coanda effect Secondary flow Wall boundaries Offset ratio

Main Article Content

H. Tezuka
Mechanical Engineering Program in the Graduate School of Engineering, Kogakuin University, Tokyo 192-0046, Japan
K. Yabu
Department of Mechanical System Engineering, Kogakuin University, Tokyo 192-0046, Japan
K. Nishibe
Department of Mechanical Engineering, Tokyo City University, Tokyo 158-8557, Japan
D. Kang
Department of Mechanical Engineering, Saitama University, Saitama 338-8570, Japan
K. Sato
Department of Mechanical System Engineering, Kogakuin University, Tokyo 192-0046, Japan

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.

Article Details

How to Cite
Tezuka, H., K. Yabu, K. Nishibe, D. Kang, & Sato, K. (2024). Effect of Plane Walls on Flow Characteristics of Primary Jets Controlled by Secondary Flow. Journal of Research and Applications in Mechanical Engineering, 12(2), JRAME–24. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/254275
Issue
Vol. 12 No. 2 (2024): In progress
Section
RESEARCH ARTICLES
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

by-nc-sa

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

References

Mason MS, Crowther WJ. Fluidic thrust vectoring of low observable aircraft. CEAS Aerospace Aerodynamic Research Conference; 2002 Jun 10-12; Cambridge, United Kingdom. London: RaeS; 2002. p. 1-17.

Watanabe Y, Sato K, Sato M, Nishibe K, Kang D, Yokota K. Vector control of jet flow using secondary excited jets. The 29th International Symposium on Transport Phenomena; 2018 Oct 30-Nov 2; Hawaii, USA.

Tamanoi Y, Watanabe Y, Kobayashi R, Sato K. Control of jet flow direction. Proceedings of the 57th Annual Meeting of the Hokkaido Branch of the Japan Society of Mechanical Engineers; 2020 Mar 7; Hokkaido, Japan.

Tezuka H, Nakagawa M, Tamanoi Y, Sato K. Direction control of primary jets using secondary flow near boundaries. Proceedings of the 28th Annual Meeting of the Kanto Branch of the Japan Society of Mechanical Engineers; 2022 Mar 14-15; Japan. (Online)

Tezuka H, Nakagawa M, Zhang Q, Sato K. Directional control of jets near a boundary using coander secondary flow. The 21st International Symposium on Advanced Technology; 2022 Nov 24,25; Vietnam. (Online)

Tezuka H, Zhang Q, Nishibe K, Sato K. Flow-direction control of primary jets near a wall boundary using secondary flow with a Coanda surface. 12th TSME-International Conference on Mechanical Engineering; 2022 Dec 13-16; Bangkok: Thailand. p. 400-406. (Online)

Tezuka H, Zhang Q, Nishibe K, Sato K. Flow-Direction control of primary jets near a wall boundary using secondary flow with a coanda surface. J Res Appl Mech Eng. 2023;11(2):1-7.

Borque C, Newman BG. Reattachment of a two-dimensional, incompressible jet to an adjacent flat plane. Aeronautical Quarterly. 1960;11(3):201-232.

Hunter CA, Deere KA. Computational investigation of fluidic counterflow thrust vectoring. 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit; 1999 Jun 20-23; Los Angeles, United States. Reston: AIAA; 1999. p. 1-13.

Shakouchi T. Jet flow engineering fundamentals and applications. Japan: Morikita Publishing; 2009.

Trancossi M, Stewart J, Maharshi S, Angeli D. Mathematical model of a constructal Coanda effect nozzle. J Appl Fluid Mech. 2016;9(6):2813-2822.

Al-Asady AAA, Abdullah AM. Fluidics thrust vectoring using co-flow method. Al-Nahrain J Eng Sci. 2017;20(1):5-18.

Kobayashi R, Watanabe Y, Tamanoi Y, Nishibe K, Kang D, Sato K. Jet vectoring using secondary Coanda synthetic jets. Mech Eng J. 2020;7(5):1-16.

Tamanoi Y, Kobayashi R, Sato K, Nishibe K, Kang D. Flow control using excited jets with coanda surfaces. The 31st International Symposium on Transport Phenomena; 2020 Oct 13-16; USA. (Online)

Tamanoi Y, Watanabe Y, Kobayashi R, Sato K. Jet direction control using secondary flows. International Symposium on Transport Phenomena and Dynamics of Rotating Machinery; 2020 Nov 23-26; USA. (Online)

Tamanoi Y, Sato K. Structure of jet deflected by secondary flow. The 20th International Symposium on Advanced Technology; 2021 Nov 23-24; Japan. (Online)

Zhang Q, Takahashi F, Sato K, Tsuru W, Yokota K. Jet direction control using circular cylinder with tangential blowing. Trans Jpn Soc Aeronaut Space Sci. 2021;64(3):181-188.