Hierarchical Validation Method in Virtual Experiment of Liquid Rocket Engine
Validation is the primary means to assess confidence in modeling and simulation, which is defined as the assessment of the accuracy of a computational simulation by comparison with experimental data. This paper presented a review of the literature in computational validation of liquid rocket engine and developed a hieratical method. The complex liquid rocket engine is decomposed into three levels: system level, subsystem level and component leveL Validation of such a system adopts a top-down strategy: the improved AHP method which employed Design of Experiment (DoE) to calculate the weight factor quantitatively. Then the hierarchical quantitative errors of the numerical model predictions are obtained, which can test the validity of the numerical models. In this paper, the developed validation method simplified the complex system model which is decomposed into hierarchical structure, and the expensive limited test data is used efficiently. The predictive ability of numerical models is described quantitatively, and the hierarchical model validation method is proved to be available and practical by an example, which can resolve the excessive subjective factors of AHP. The significant improved validation method is the foundation of the virtual experiment technology.
validation liquid rocket engine virtual experiment hierarchical AHP
Duan Na Zhang Lihui Zhu Zihuan
School of Astronautics, Beijing University of Aeronautics and Astronautics,Beijing, 100191, China, Beijing Institute of Aerospace Testing Technology,Beijing, 100074, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
1115-1118
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）