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다중격자기법을 이용한 극초음속 유동장 계산 : Application of Multigrid Method for Computing Hypersonic Flows
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김성수 | - |
dc.contributor.author | 김종암 | - |
dc.contributor.author | 이수갑 | - |
dc.creator | 김종암 | - |
dc.date.accessioned | 2013-05-28T02:08:40Z | - |
dc.date.available | 2013-05-28T02:08:40Z | - |
dc.date.issued | 2001-02 | - |
dc.identifier.citation | 한국항공우주학회지, Vol.29 No.1, pp. 8-15 | - |
dc.identifier.issn | 1225-1348 | - |
dc.identifier.uri | https://hdl.handle.net/10371/82493 | - |
dc.description.abstract | This paper presents an efficient and robust multigrid method for computing inviscid and viscous high-speed steady-state reactive flows. Curve fitted data in NASA Reference Publication 1811, 1260 are used to calculate equilibrium properties. Nonequilibrium flows are calculated using 5-species and 2-temperature air model. A 5-stage Runge-Kutta method and an LU-SGS method are adopted for time integration. When a 5-stage Runge-Kutta method is used, the chemical source terms are treated in a point-implicit manner. In order to overcome stabiEty problem in applying multigrid method to high-speed reactive flow calculation, an improved damped prolongation and a new implicit residual smoothing are proposed. This method is applied to computing hypersonic equilibrium and nonequilibrium flows over a half-cylinder at a flight condition corresponding to M=10 and 60km altitude. Results indicate the robustness of proposed methods and good multigrid speed-ups in both equilibrium and nonequilibrium test cases. | - |
dc.description.abstract | 화학반응을 동반한 극초음속 유동의 효율적인 계산을 위한 강건한 다중격자기법이 본 논문에서 연구되었다. 평형유동 계산을 위하여 NA5A RP-1811과 RP-1260의 curve-fit data를 이용하였으며 비평형유동 계산은 5-species, 2-temperature 모델을 이용하였다. 시간적분은 외재적 방법인 5단계 Runge-Kutta와 내재적 방법인 LU-SGS를 사용하였으며 각 기법의 계산 효율을 비교하였다 다중격자기법을 극초음속 유통에 적용할 경우 생기는 불안정성을 해결하기 위하여 damped prolongation과 residual smoothing을 새로이 개발하였고 이를 마하수 10의 half-cylinder 문제에 적용하였다. | - |
dc.language.iso | ko | en |
dc.publisher | 한국항공우주학회 | en |
dc.subject | 공학 | en |
dc.title | 다중격자기법을 이용한 극초음속 유동장 계산 | en |
dc.title.alternative | Application of Multigrid Method for Computing Hypersonic Flows | - |
dc.type | Article | - |
dc.author.alternative | Kim, Sung-Soo | - |
dc.author.alternative | Kim, Chongam | - |
dc.author.alternative | Lee, Sugab | - |
dc.description.srnd | OAIID:oai:osos.snu.ac.kr:snu2001-01/102/0000004648/3 | - |
dc.description.srnd | SEQ:3 | - |
dc.description.srnd | PERF_CD:SNU2001-01 | - |
dc.description.srnd | EVAL_ITEM_CD:102 | - |
dc.description.srnd | USER_ID:0000004648 | - |
dc.description.srnd | ADJUST_YN:N | - |
dc.description.srnd | EMP_ID:A001138 | - |
dc.description.srnd | DEPT_CD:446 | - |
dc.description.srnd | CITE_RATE:0 | - |
dc.description.srnd | FILENAME:다중격자기법을_적용한_극초음속_유동장_계산.pdf | - |
dc.description.srnd | DEPT_NM:기계항공공학부 | - |
dc.description.srnd | EMAIL:chongam@snu.ac.kr | - |
dc.description.srnd | CONFIRM:Y | - |
dc.identifier.srnd | 2001-01/102/0000004648/3 | - |
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