本文旨在研究關於波浪場中圓孔浮昇射流排放角度的變化與波浪條件同時作用下，透過表面稀釋率的定量量測，以明白稀釋特性的演變，期能歸納出其間的相關特性，作為日後海洋放流工程設計上的參考。而為保持流場特性的不受干擾，本文乃利用雷射誘發螢光原理(LIF)，以及影像處理技術，結合兩者以建立本文之量測系統作為研究之工具。
　　根據實驗觀測與分析結果得知在波浪運動下之浮昇射流，因射流運動將隨波浪而有往復性地擺盪，不僅邊界寬度的擴展較純射流時大，稀釋率也將大幅提升，而角度變化對其造成的影響，仍是隨角度遞增而遞減。經由表面稀釋率定量量測結果發現，在順向或逆向射流時，表面稀釋率皆優於純射流，兩者其無因次表面稀釋率S/So值皆隨著波浪參數Lq/Zm呈線性遞增，且在相同角度下，逆向射流之表面稀釋率略優於順向射流。再者，於一般海洋放流環境，波浪條件屬於中間性水波，則可由本文之研究結果歸納之經驗式，求得欲估算已知排放角度之表面稀釋率值，以供工程設計上之參考。

　　In order to understand the characteristics of dilution of buoyant jet discharged from different angles in wave motions, the combination of laser induced fluorescence(LIF) techniques and image processing was established in the measuring system.
　　The results of experiment show that the trajectory of jet flow was deflected by wave action periodically. The dilution and spreading rate of boundary were wider than pure buoyant jet. From the quantative results of surface dilution measurements, it can be concluded that the surface dilution rate of jet with wave condition is greater than the cases without wave motion. The dimensionless surface dilution(S/So) increases in proportion to the non-dimensional wave parameter(Lq/Zm). The surface dilution of opposing wave direction is slightly better than the same direction. Further, there is a reference in generally ocean outfall environment that if the discharge angle was known, the surface dilution can be estimated from the experiential equation in this paper.

1. Abraham, G. (1965), Horizontal jet in stagnant fluid of other density, J. Hydraulic Div., ASCE, Vol. 91, pp. 139-154.
2. Anwar, H. O. (1969), Behavior of buoyant jet in calm fluid, J. Hydraulic Div., Vol. 95, pp. 1289-1303.
3. Chin, D. A. (1987), Influence of surface waves on outfall dilution, J. of Hydraulic Eng., Vol. 113, No. 8, pp. 1006-1017.
4. Chin, D. A. (1988), Model of buoyant-jet-surface-wave interaction, J. of Waterway, Port, Coastal, and Ocean Eng., Vol. 114, No. 3, pp. 331-345.
5. Chyan, J. M., Hwung, H. H., & Chang, Y. H. (1991), Wave effects on the mean flow characteristics of turbulent round jets, Proc. Of the Intl. Symp. on Envir. Hydraulics, A. A. Balkema, Vol. 1, pp. 109-114.
6. Chyan, J. M. (1992), The initial dilution process of vertical turbulent round jet under wave effects, Dissertation Submitted for the Degree of Doctor of Philosophy in Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C.
7. Chyan, J. M., Hwung, H. H. (1993), On the interaction of a turbulent jet with waves, J. of Hydraulic Research, Vol.31, No.6, pp. 791-810.
8. Drexhage, K. H. (1973), Structure and properties of laser dyes, Topics in Applied Physics, Springer, Vol. 1, pp. 145-193.
9. Fischer, H. B., List, E. J., Koh, R. C. Y., Imberger, J. & Brooks, N. H. (1979), Mixing in inland and coastal waters, Academic Press, New York, N.Y.
10. Ger, A. M. (1979), Wave effects on submerged buoyant jets, Proc. Hydraulic Eng. in Water Resources Development and Management, IAHR, pp. 295-300.
11. Hwung, H. H. (1981), Velocity and temperature distributions of turbulent plane jet interacting with small amplitude wave, Dissertation of PH. D., National Cheng Kung Univ., R.O.C.
12. Hwung, H. H. & Chen, Y. Y. (1981), The development of the velocity distribution in turbulent plane jet interacting with obliquely waves, Proc. 5th Conf. on Ocean Eng. in R.O.C., pp. 219-235.
13. Hwung, H. H., & Chyan, J. M. (1990), The vortex structures of round jets in water waves, Proc. Intl. Conf. on Physical Modeling of Transport and Dispersion in conjunction with the GARBIS H. KEULEGAN Centennial Symp. IAHR, pp. 10A.19-10A.24.
14. Hsu, C. T. and Chen, X. (1994), Dispersion in turbulent jets interacting with standing water waves, Proc. of 4th Asian Sym. On Visualization, May 15-18, Beijing, China, pp. 123-128.
15. Ismail, N. M. (1980), Wave-current interaction, Tech. Rep. HEL27-7, Hydraulic Eng. Lab., Univ. of California.
16. Ismail, N. M. & Wiegal, R. L. (1983), Opposing wave effect on momentum jets spreading rate, J. of Waterway, Port, Coastal, and Ocean Eng., Vol.
109, No. 4, pp. 465-483.
17. Koole, R. and Swan, C. (1994), Measurements of a 2-D non-buoyant jet in a wave environment, Coastal Engineering, Vol. 24, pp. 151-169.
18. Papanicolaou, P. N. & List, E. J. (1987), Statistical and spectral properties of tracer concentration in round buoyant jets, Journal of Heat Mass Transfer, Vol. 30, No. 10, pp. 2059-2071.
19. Papanicolaou, P. N. & List, E. J. (1988), Investigations of round vertical turbulent buoyant jets, J. Fluid Mech., Vol. 195, pp. 341-391.
20. Ramaprian, B. R & M. S. Chandrasekhara, 1985, LDA Measurement in plane turbulent jet Transaction of ASME, Vol. 107, Jun, pp. 264-271.
21. Shuto, N. & Ti, L. H. (1974), Wave effects on buoyant plumes, Proc. 8th Cong., IAHR, pp. 295-300.
22. Sharp, J. J. & Power, K. C. (1985), The local effect of wave action on submerged effluent discharge, Canadian Coastal Conference, pp. 1-10.
23. 陳青岳 (1993)，波浪流場中水平浮昇射流之稀釋機構，國立成功大學水利及海洋工程研究所碩士論文。
24. 張遠志 (1998)，浮昇射流之表面稀釋特性，國立成功大學水利及海洋工程研究所碩士論文。
25. 黃榮鑑 (1991)，波浪對於海洋放流影響研究(Ⅰ)，行政院國家科學委員會專題研究報告，NSC-79-0410-E001-02。
26. 黃榮鑑 (1992)，波浪對於海洋放流影響研究(Ⅱ)，行政院國家科學委員會專題研究報告，NSC-81-0209-E001-01。
27. 黃榮鑑、楊文昌，徐梓良 (1992)，波浪對於浮昇射流之影響研究，第十四屆海洋工程研討會論文集，pp. 177-193。
28. 黃成安 (2001)，波浪作用下垂直平面射流之稀釋特性，國立成功大學水利及海洋工程研究所碩士論文。