梁乃匡2006-07-252018-06-282006-07-252018-06-281999http://ntur.lib.ntu.edu.tw//handle/246246/14717本文作者曾探討利用氣泡與水的混合液較輕與氣泡浮升的動能帶動流體上昇的機制，將海 中深層高營養鹽的海水揚升至表層，以提高海域基礎生產力，發現效率高，甚具實用價值，同 時發現以功率平衡理論得到進氣量與揚升水量間之關係時，氣泡與液體間之滑移現象的影響不 容忽視(1997,1998)，但實驗結果與氣力揚升理論比對發現仍有差異，表示另有影響因素，故繼 續探討原因。先考慮沒有出流量與有出流量狀況時滑動摩擦速度分佈的差異，提出滑動摩擦修 正係數以修正滑動摩擦損耗；再增加考慮表面張力影響水面抬升；又發現出水口水面隆升所需 功率，對推算結果有重大影響；另外加入出水管口深度與海水垂直分層間密度差的效應，將氣 力揚升理論推廣至能適用在海中以氣力揚升方式產生湧升流的情形，建立氣力揚升式人工湧升 流理論。如人工湧升器安裝於基隆海谷，使用直徑2M 管長100M 的湧升管，將海水由海面下 110M 揚升至海面下10M，僅需0.011 cms 的進氣量，即可產生1 cms 的出流量，湧升效率超過 90 倍，極具開發潛力。The authors have studied the hydrodynamics of an air-liquid two-phase flow, which can upwell a huge amount of deep seawater rich in nutrients to the sea surface to generate high primary productivity. The preliminary study was promising and the upwelling efficiency was very high (1997,1998). However, the further study shows that the result between experiment and air-lift theory is not identical. It means there exist new factors to be considered. The factors include distribution of slip velocity, level raise due to surface tension and density decrease of air-water mixture, and depth of outlet. A formula of air-lift artificial upwelling is deduced by the aforementioned factors and stratification effect. By employing the formula, an estimate of 1cms upwelled seawater from 110M to 10M in depth below sea level can be induced by an air flow-rate of 0.011cms through a pipe of 2M in diameter and 100M in length. The application of air-lift artificial upwelling is in great potential.application/pdf64049 bytesapplication/pdfzh-TW國立臺灣大學海洋研究所基礎生產力氣力揚升人工湧升流primary productivityair-liftartificial upwellingreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/14717/1/882611E002022.pdf