수축-확대 노즐 후방 급 확대관 입출구 직경비에 따른유동장 해석 연구

Numerical Analysis of Flow Fields in a Sudden Expansion Duct Downstream of a Converging Diverging Nozzle for Various Diameter Ratios
  • 오대성; 
  • 김정민; 
  • 김민성; 
  • 김경록

초록

A numerical investigation was conducted to analyze the flow field for various diameter ratios between theconverging-diverging (C-D) nozzle and the sudden expansion duct (SED) exit under a nozzle pressure ratio(NPR) of 3. Three different diameter ratios were selected of 1, 1.8 and 3.6. The flow field of two-dimensionalconverging-diverging nozzle connected to the sudden expansion duct was analyzed using commercialcomputational fluid dynamics (CFD) software. The Mach number, pressure distribution, and streamlines wereobtained to investigate the flow field characteristics of the numerical test model. The numerical resultsdemonstrated that the flow-field characteristics differed substantially with changes in the diameter ratio, evenunder identical flow conditions.

키워드

Converging-Diverging Nozzle(수축 확대노즐- ); Flow Field Analysis(유동장 해석); Sudden Expanded Duct(급격한 확대부); Computational Fluid Dynamics(전산유체역학)
제목
수축-확대 노즐 후방 급 확대관 입출구 직경비에 따른유동장 해석 연구
제목 (타언어)
Numerical Analysis of Flow Fields in a Sudden Expansion Duct Downstream of a Converging Diverging Nozzle for Various Diameter Ratios
저자
오대성; 김정민; 김민성; 김경록
DOI
10.14775/ksmpe.2026.25.10.108
발행일
2026-10
유형
Y
저널명
한국기계가공학회지
권
25
호
10
페이지
108 ~ 113