Volume 17, Issue 4 (2017)                   Modares Mechanical Engineering 2017, 17(4): 431-442 | Back to browse issues page

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Bozorgian M, Dolabi M H, Tarabi A. Numerical Investigation of Lateral jet interaction effects on aerodynamic behavior of a supersonic projectile. Modares Mechanical Engineering. 2017; 17 (4) :431-442
URL: http://journals.modares.ac.ir/article-15-10338-en.html
1- Malek Ashtar University of Technology
Abstract:   (1661 Views)
Lateral jet control systems are being considered as attractive alternatives to conventional control systems in recent years. In present study which is divided in two parts, the effects of lateral jet interaction with supersonic cross flow on aerodynamic behavior of a standard projectile at zero angle of attack has been studied. In the first part, results of the effects of parameters such as jet location, Mach number and nozzle type on pressure coefficient, drag coefficient, drag force and pressure distribution on the fins is presented and analyzed. In the second part, longitudinal static and dynamic stability coefficients of the projectile in presence of lateral jet has been achieved and evaluated according to the mentioned parameters. According to the results, jet location is the most effective parameter. In the first part, the pressure distribution on the fins is much dependent on jet location. Effect of Mach number on pressure coefficient, drag force and drag coefficient is also significant. Besides change of the pressure distribution on the fins comes more into sight at the final locations by variation of Mach number. In the second part, lateral jet effect leads to decreasing longitudinal static stability. Increasing the Mach number is also results in decreasing longitudinal dynamic stability and jet displacement make nonlinear behavior over pitch damping moment coefficient, therefore choosing proper jet location is depend on desired parameters of designer. According to the results, effect of nozzle type has been insignificant for all cases.
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Article Type: Research Article | Subject: Aerodynamics
Received: 2016/12/25 | Accepted: 2017/03/5 | Published: 2017/04/29

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