한국연소학회지 (Journal of the Korean Society of Combustion)
- 제13권1호
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- Pages.17-22
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- 2008
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- 1226-0959(pISSN)
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- 2466-2089(eISSN)
효율적인 상세 반응 기구 해석을 위한 민감도 기반의 부분 음해법
Partial Preconditioning Approach for the Solution of Detailed Kinetics Problems Based on Sensitivity Analysis
- 강기하 (부산대학교 항공우주공학과 대학원) ;
- 문성영 (부산대학교 항공우주공학과 대학원) ;
- 노진현 (부산대학교 항공우주공학과 대학원) ;
- 원수희 (서울대학교 항공우주공학과 대학원) ;
- 최정열 (부산대학교 항공우주공학과)
- Kang, K.H. ;
- Moon, S.Y. ;
- Noh, J.H. ;
- Won, S.H. ;
- Choi, J.Y.
- 발행 : 2008.03.31
초록
A partly implicit/quasi-explicit method is introduced for the solution of detailed chemical kinetics with stiff source terms based on the standard fourth-order Runge-Kutta scheme. Present method solves implicitly only the stiff reaction rate equations, whereas the others explicitly. The stiff equations are selected based on the survey of the chemical Jaconian matrix and its Eigenvalues. As an application of the present method constant pressure combustion was analyzed by a detailed mechanism of hydrogen-air combustion with NOx chemistry. The sensitivity analysis reveals that only the 4 species in NOx chemistry has strong stiffness and should be solved implicitly among the 13 species. The implicit solution of the 4 species successfully predicts the entire process with same accuracy and efficiency at half the price.
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