서지주요정보
Upwind 방법을 이용한 극초음속 유동장 해석 = Hypersonic aerothermodynamic analysis using upwind methods
서명 / 저자 Upwind 방법을 이용한 극초음속 유동장 해석 = Hypersonic aerothermodynamic analysis using upwind methods / 박수형.
저자명 박수형 ; Park, Soo-Hyung
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009594

소장위치/청구기호

학술문화관(문화관) 보존서고

MAE 99010

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

A hypersonic aerothermodynamic analysis method with a new HLLEM scheme is presented. Several entropy correction techniques for Roe scheme are studied and an entropy corrected HLLEM schems is proposed in order to maintain the accuracy and to enhance the robustness of HLLEM scheme. Although the Roe scheme require the entropy correction for all characteristic fields, the HLLEM scheme need the correction for linear-degenerated field only since it is automatically satisfied with the entropy condition. The proposed HLLEM scheme with Lin-type entropy correction function is proved to be a simple, accurate and robust spatial discretization method. The steady-state solutions are obtained using an DADI time marching method which is proposed in order to improve the convergence of FDS schemes. In addition, the mesh sequencing technique is used to stabilize initial transient modes and improve the convergence. To demonstrate the accuracy and the robustness of present method, a shock/laminar boundary layer interaction problem is presented. Hypersonic flows past Mach 16 cylinder and Mach 20 axisymmetric cone shape vehicle are also analyzed using perfect gas and equilibrium real gas models. The results show that the proposed method not only prevents the nonphysical solutions of FDS methods, but also maintains the accuracy of FDS at hypersonic viscous boundary layer.

서지기타정보

서지기타정보
청구기호 {MAE 99010
형태사항 v, 65 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Soo-Hyung Park
지도교수의 한글표기 : 권장혁
지도교수의 영문표기 : Jang-Hyuk Kwon
학위논문 학위논문(석사) - 한국과학기술원 : 항공우주공학과,
서지주기 참고문헌 : p. 62-65
주제 극초음속
DADI
정상
평형 실제 기체
HLLEM
Hypersonic
DADI
Steady
Equilibrium real gas
HLLEM
QR CODE qr code