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층류 유동반응기를 이용한 프로핀 반응 실험 및 축소 메커니즘의 검증
조천현(Cheon Hyeon Cho),한가람(Ka Ram Han),손채훈(Chae Hoon Sohn),한정식(Jeongsik Han) 한국연소학회 2019 한국연소학회지 Vol.24 No.3
Flow reactors are classified into laminar flow, turbulent flow and jet-stirred reactors depending on flow condition. Laminar flow reactor is a device that measures oxidation process of gaseous fuel and vaporized liquid fuels. Propene oxidation process was observed in a laminar flow reactor with a specified residence time at 6 atm, 968 K, and equivalence ratio of 0.71 and compared with numerical simulations. The Aramco 2.0 chemistry was adopted as a kinetic mechanism which includes 493 species and about 2,700 reaction steps. Oxygen, carbon monoxide, and carbon dioxide concentrations were measured. Numerical results with a time shift of 0.216 s show a good agreement with experimental results. And, a reduced kinetic mechanism was generated and validated based on the Aramco 2.0. The reaction steps are reduced by 23%.
A Numerical Study on Gas Mixing Time in a Low-Pressure (Driven) Section of a Shock Tube
왕위엔강,조천현,손채훈,윤영빈,Wang, YuanGang,Cho, Cheon Hyeon,Sohn, Chae Hoon,Yoon, Youngbin The Korean Society of Combustion 2017 한국연소학회지 Vol.22 No.3
The fuel and oxidizer mixing process in the shock tube driven section is simulated numerically. The boundary condition is set based on an shock tube experimental condition. The objective is to predict the gas mixing time for experiments. In the experiment, the amount of fuel to be injected is determined in advance. Then, according to duration of fuel injection, 5 cases with the same fuel mass but different fuel mass flow rate are simulated. After fuel is injected into the driven section, the fuel and air will be mixed with each other through convection and diffusion processes. The mixing time is predicted numerically for experiments.