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강영진(Y.J. Kang),양영록(Y.R. Yang),김성현(S.H. Kim),황의창(U.C. Hwang),염용일(Y.I. Youm),명노신(R.S. Myong),조태환(T.H. Cho) 한국전산유체공학회 2009 한국전산유체공학회 학술대회논문집 Vol.2009 No.11
In this study the performance of the nozzle of a rocket system is evaluated using a CFD code. The main emphasis of the investigation is placed on the effects of the number (9 and 12) and the depth of fluted edge in the rocket nozzle. It is observed that as the depth increases the rolling moment of the nozzle increases while the thrust of the nozzle decreases.
강영진(Y.J. Kang),양영록(Y.R. Yang),황의창(U.C. Hwang),명노신(R.S. Myong),조태환(T.H. Cho) 한국전산유체공학회 2011 한국전산유체공학회지 Vol.16 No.3
As a preliminary design study to achieve target aerodynamic performance, this work was conducted on an original nozzle with 9 flutes in order to design a fluted nozzle with 12 flutes. The thrust and rolling moment of the nozzle with 12 flutes were analyzed using a CFD code according to the depth and rotation angle of the flutes. Based on this, a fluted nozzle with 12 flutes was optimized to yield the same thrust as that of the original nozzle with 9 flutes. The response surface method was applied for shape optimization of the fluted nozzle and design variables were selected to determine the depth angle and rotation angle of the flutes. An optimized shape that led to a thrust as strong as that of the original nozzle was obtained