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清华大学燃烧能源中心学术报告第一期 2016年春季第一讲

报告题目:Measurement of Laminar Flame Speed and Development of Reduced Mechanisms for n-Dodecane

报告人:姚通博士

报告人单位:清华大学燃烧能源中心

报告时间:2016年3月3日  15:00-16:00

报告地点:李兆基科技大楼B515会议室

Abstract: n-Dodecane is a good surrogate for diesel and jet fuel. However, detailed kinetic mechanisms of n-dodecane are still too large to apply into 3-D simulation of engines. In the present work, using spherical bomb experiment system, laminar flame speed of n-dodecane was measured under the conditions of p=1atm, initial temperature T=400K, 460K, stoichiometric ratio φ=0.7-1.4. According to skeletal mechanism construction and optimization method based on the reaction path analysis and sensitivity analysis of large mechanisms, a skeletal mechanism of n-dodecane (54 species and 269 reactions) were obtained. Then, based on the time scale analysis reduction method, reduced mechanism of n-dodecane (35 species and 31 reaction steps) was developed, the mechanism was validated against the skeletal one for a wide range of conditions. Finally, the reduced n-dodecane mechanism was applied to the three-dimensional numerical simulation of a supersonic combustor, the results showed that the reduced mechanism could well predict the wall pressure distribution along the combustor, which provided useful guidance for further optimization of multidimensional supersonic combustion numerical simulation.

Brief Biography: Tong Yao is a postdoc fellow in Prof. Kai Hong Luo’s group of CCE. He got Ph.D. degree of Power Engineering and Engineering Thermophysics in School of Aerospace, Tsinghua University in 2016. In 2013-2014, He got the Tsinghua Scholarship for Overseas Graduate Studies and studied in Prof. Tianfeng Lu’s group in University of Connecticut for six months. His research interests focus on Chemical kinetics and mechanism reduction of large hydrocarbon fuels and Reacting flow simulation coupled with reduced chemical mechanisms.

 

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