Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Experimental and Numerical Study on Behavior of Impinging Spray according to Ambient Temperature

분위기 온도에 따른 충돌 분무의 거동에 대한 실험 및 수치적 연구

  • Shim, Young-Sam (Research Institute of Mechanical Technology, Pusan National University) ;
  • Choi, Gyung-Min (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Duck-Jool (School of Mechanical Engineering, Pusan National University)
  • Published : 2007.07.01
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Abstract

The numerical study on behavior of impinging spray from high-pressure swirl injector under various ambient temperatures was performed by using spray vaporization model and spray-wall impingement model implemented in modified KIVA code, and these spray models were estimated by comparison with experimental results. To compute the spray-wall impingement process, the Gosman model, which is based on the droplet behavior after impingement determined by experimental correlations, was used. The modified Abramzon and Sirignano model, that includes the effects of variable thermodynamic properties and non-unitary Lewis number in the gas film, was adapted for spray vaporization process. The exciplex fluorescence measurements were also conducted for comparison. The experimental and numerical analysis were carried out at the ambient pressures of 0.1 MPa and at the ambient temperature of 293 K and 473 K, and the spray characteristics, such as spray-wall impingement process, gas velocity field, SMD and vapor concentration, were acquired. It was found that the impinging spray develops active and SMD is small at vaporization conditions.

Keywords

References

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