Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Initial Mixing Analysis of Ocean Outfalls Discharged into Density Stratified Flowing Ambients

밀도성층화된 흐름수역으로 방류되는 해양방류관의 초기확산해석

  • 이재형 ((주)대우건설 항만단지설계팀) ;
  • 서일원 (서울대학교 공과대학 토목공학과)
  • Published : 2000.04.01
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Abstract

A numerical model is applied to analyze the mixing characteristics of an axisymmetric turbulent buoyant jet discharged into flowing stratified ambients. The numerical model is a Gaussian-vortex model which incorporates the effects of the vortex pair known as the representative characteristics of far-field in flowing ambients. Six ocean outfalls that have field data for the initial dilution at the water surface are selected for testing the applicability of the developed numerical model. The comparisons of the observed initial dilutions and the simulated ones show that the developed numerical model could be used for the analyses of the initial mixings induced by the sewage diffuser discharged into the ocean.

밀도성층화된 흐름 수역으로 방류되는 부력제트에 의한 초기확산을 해석하기 위하여 수치모형을 적용하였다. 수치모형은 제트적분모형으로서 흐름수역의 원역에서의 대표적 특성으로 밝혀진 쌍와흐름특성을 모형에 반영한 Gaussian-vortex모형이다. 수치모형의 현장 적용성을 검토하기 위하여 수표면에서의 초기희석에 대한 관측이 수행된 6개의 해양방류관에 수치모형을 적용하였다. 현장관측자료에 대한 수치모형의 적용결과, 개발된 수치모형이 하수확산관에 의해 해양으로 방류되는 오염물질의 초기 확산해석에 활용될 수 있음을 알 수 있었다.

Keywords

References

  1. 서일원, 이재형, 김창시 (1998). '오염물질의 해양방류기술(IV): 하수확산관의 설계 및 시공', 한국수자원학회지, Vol. 31 No.4, 78-88
  2. 이재형 (1999). 밀도성층화된 흐름수역으로 방류되는 원형부력제트의 혼합예측모형, 박사학위논문, 서울대학교
  3. 이재형, 서일원 (1999a). '난류원형부력제트의 혼합거동해석 : I. 수치모형의 개발', 한국토목학회 논문집 (심사중)
  4. 이재형, 서일원 (1999b). '난류원형부력제트의 혼합거동해석: II . 모형의 검증', 한국토목학회 논문집 (심사중)
  5. Agg, A.R. (1978). 'Initial Dilutions.' Investigations of Sewage Discharges to Some British Coastal Waters, Chap. 6, Technical Report 99, Water Res. Center
  6. Fan, L.N.(1967). Turbulent Buoyant Jets into Stratified or Flowing Ambient Fluids. Rep. No. KH-R-15, Calif. Inst. of Technol., Pasadena, Calif.
  7. Fischer, H.B., List, E.J., Koh, R.C.Y., Imberger, J., and Brooks, N.H.(1979). Mixing in Inland and Coastal Waters. Academic Press
  8. Lee, J.H.W., and Neville-Jones, P.(1987). 'Initial Dilution of Horizontal Jet in Crossflow.' J. of Hydr. Engrg., ASCE, 113(5), pp. 615-629
  9. MacDonald, G.J. (1984). 'Pretreatment of Effluents in Relation to Outfall Design and Operation.' Joint Session on Coastal Outfalls, In Water Supply and Waste Disposal for Large Industry, Proceeding Annual Corference, New Zealand Water Supply and Disposal Assoc., New Plymouth
  10. Muellenhoff, W.P., Soldate, Jr., A.M., Baumgartner, D.J., Schuldt, M.D., Davis, L.R., and Frick, W.E.(1985). Initial Mixing Characteristics of Municipal Ocean Discharges, Vol. I Procedures and Applications. EPA 630/3-85-073a, Marine Operation Division: 301(h) Program, Office of Marine and Estuarine Protection, Washington, D.C.
  11. Proni, J.R., Huang, H., and Dammann, W.P.(1994). 'Initial Dilution of Southeast Florida Ocean Outfalls.' J. of Hydr. Engrg., ASCE, 120(12), pp. 1409-1425 https://doi.org/10.1061/(ASCE)0733-9429(1994)120:12(1409)
  12. Schlichting, H.(1979). Boundary Layer Theory. McGraw-Hill, New York, 6th edition
  13. Wood, L.R., Bell, R.G., and Wilkinson, D.L.(1993). Ocean Disposal of Wastewater. World Scientific
  14. Wright, S.J.(1977). Effects of Ambient Crossflows and Density Stratification on the Characteristic Behavior of Round Turbulent Buoyant Jets. W.M. Keck Lab. of Hydr. and Water Res., Calif. Inst. of Technol., KH-R-36
  15. Wright, S.J.(1984). 'Buoyant Jets In Density-Stratified Crossflow.' J. of Hydr. Engrg., A5CE, 110(5), pp. 643-656