Journal of ILASS-Korea (한국분무공학회지)
- Volume 5 Issue 1
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- Pages.13-22
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- 2000
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- 1226-2277(pISSN)
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- 2288-9051(eISSN)
Unstructured Finite-Volume Analysis of Vaporization Characteristics of Fuel Droplets in Laminar Flow Field
비정렬 유한체적법을 이용한 유동장 내의 연료액적 증발 특성 해석
Abstract
The present study has numerically analyzed the vaporization characteristics of fuel droplets in the high temperature convective flow field. The axisymmetric governing equations for mass, momentum, energy, and species are solved by an iterative and implicite unstructured finite-volume method. The moving boundary due to vaporization is handled by the deformable unstructured grid technique. The pressure-velocity coupling in the density-variable flows is treated by the SIMPLEC algorithm. In terms of the matrix solver, Bi-CGSTAB is employed for the numerically efficient and stable convergence. The n-decane is used as a liquid fuel and the initial droplet temperature is 300K. Computations are performed for the nonevaporating and evaporating droplets with the relative interphase velocity(25m/s). The unsteady vaporization process has been simulated up to the nondimensional time, 25. Numerical results indicate that the mathematical model developed in this study succesfully simulates the main features of the droplet vaporization process in the convective environment.
Keywords
- Unstructured-grid finite-volume method;
- Moving boundary;
- Deformable grid technique;
- Fuel droplet;
- Vaporization
- 비정렬격자 유한체적법;
- 이동경계;
- 변형격자 생성기법;
- 연료 액적;
- 증발과정;