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압력파 교란에 의한 액적 내부 에너지 파동 및 연소응답
이길용(Gilyong Leec),윤웅섭(Woongsub Yoon) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Numerical simulations of droplet vaporization perturbed by acoustic pressure is conducted to investigate thermal wave transfer in a droplet and its effects on combustion response. The one-dimensional droplet vaporization model in this paper includes high pressure effects such as solubility of vapor to treat near-critical thermodynamics, and uses Soave-Redlich-Kwong equation of state and the flash vaporization method to obtain more accurate thermophysical properties of constituent species and compute vapor-liquid equilibrium at the critical surface. Calculations of an n-pentane droplet suddenly introduced as a sphere and exposed into perturbing nitrogen gas is carried out in terms of different ambient gas pressures and acoustic wave frequencies. Results show that thermal energy transfer in near surface region of a droplet determines the amplitude of combustion response of the droplet to acoustic wave.