충돌분무와 액막의 열전달 해석모델을 고려한 범용 열/유체 프로그램 NUFLEX의 개발

다국어 초록 (Multilingual Abstract)

NUFLEX is a general purpose thermo/fluid flow analysis program which has various physical models including spray. In NUFLEX, spray models are composed of breakup and collision models of droplet. However, in case of diesel engine, interaction between wall-film and impingement model considering heat transfer is not coded in NUFLEX. In this study, Lee & Ryou impingement & wall-film model considering heat transfer is applied to NUFLEX For the verification of this NUFLEX program, numerical results are compared with experimental data. Differences of film thickness and radius between numerical results and experimental data are within 10% error range. The results show that NUFLEX can be used for comprehensive analysis of spray phenomena.

참고문헌 (Reference)

1 Wachterst, L.H., "The Heat Transfer from a Hot Wall to impinging Water Drops in the Spheroidal State" 21 : 1047-1056, 1966

2 유홍선, "NUFLEX의 상변화, 분무유동 및 MHD 해석" 99-102, 2007

3 Reitz, R.D., "Modeling Atomization Processes in High-Pressure Vaporizing Sprays" 3 : 309-337, 1987

4 Xing, T.Y., "Evaporation of a liquid droplet on a hot plate" 34 (34): 1881-1894, 1991

5 Lee, S.H., "Development of a New Spray/Wall Interaction Model" 26 : 1209-1234, 2000

6 Ko, G.H., "Development and Assessment of a Hybrid Droplet Collision Model for Two Impinging Sprays" 13 : 251-272, 2003

7 Lee, S.H., "Comparison of Spray/Wall Interaction Models with Experimental Data" 14 (14): 939-945, 2000

8 O’Rourke, P.J., "Collective Drop Effects on Vaporizing Liquid Sprays" Princeton University 1981

9 Katsura, N., "Characteristics of a Diesel Spray Impinging on a Flat Wall" 1989