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http://dx.doi.org/10.5407/jksv.2019.17.1.034

Study on Aerodynamic Characteristics of a Launch Vehicle with Mach Number, Angle of Attack and Nozzle Effect at Initial Stage  

Jeong, Taegeon (Department of Mechanical Engineering, Graduate School, Sunchon National University)
Kim, Sungcho (School of Mechanical and Aerospace Engineering, Sunchon National University)
Choi, Jongwook (School of Mechanical and Aerospace Engineering, Sunchon National University)
Publication Information
Journal of the Korean Society of Visualization / v.17, no.1, 2019 , pp. 34-42 More about this Journal
Abstract
Aerodynamic characteristics for a launch vehicle are numerically analyzed with various conditions. The local drag coefficients are high at the nose of the launch vehicle in subsonic region and on the main body in supersonic region because of the induced drag and the wave drag, respectively. The drag coefficients show the similar trend with the angle of attack except zero degree. However, the more the angle of attack increases, the more dependent on the Mach number the lift coefficient is. The body rotation for the flight stability destroys the vortex pair formed above the body opposite to the flight direction, so the flow fields are more or less complicated. The drag coefficient of the launch vehicle at sea level is about three times larger than that at altitude 7.2 km. And the thrust jet at the nozzle causes to reduce the drag coefficient compared with the jetless transonic flight.
Keywords
Launch Vehicle; Aerodynamic Characteristics; Numerical Analysis; Mach Number; Angle of Attack;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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