30m급 육상 수력펌핑 양광시스템에서의 고-액 2상 유동실험 연구 = Experimental Study of Solid-Liquid Two-Phase Flow in Hydraulic Pumping System of 30m High

다국어 초록 (Multilingual Abstract)

The lifting technology plays a key role in the success of deep-sea mineral development. KIGAM (Korea Institute of Geoscience and Mineral Resources) has striven to develop it, and recently performed 30meter scale on-land lifting experiments. In the study, the hydraulic pumping test has been conducted to understand the flow characteristics of solid-liquid mixture in a lifting pipe and to acquire the design data for real offshore test that will be performed in the future. Firstly, an on-land hydraulic pumping test system of 30 meters in height was designed on the basis of the results in the small scale hydraulic pumping test previously performed. In the experiment of this study, we performed solid-liquid two phase flow tests on the condition that the maximum flow velocity was 5 m/sec and maximum solid volume fraction was 20 %,where lifting pipes were 100 mm in diameter together with 20 mm synthetic manganese nodules of the same density asthe real ones. From the tests we could analyze the relationship between solid volume fraction and flow characteristics in pipes. The results of this study will be used as a basis for the off-shore mining field experiments in the near future and for the design of the deep-sea mining system.

국문 초록 (Abstract)

양광시스템은 심해저 광물자원 개발의 성패를 좌우하는 중요한 요소이다.한국지질자원연구원(KIGAM)에서는 지금까지 양광시스템 개발연구를 수행해오고 있으며 최근에는 30 m 급 육상 양광시험시스템을 구축하였다.본 연구는 양광관내에서 고-액 유동특성을 규명하고 향후 실해역 채광시스템의 설계자료를 획득하기 위해 수력펌핑양광실험을 수행하였다. 기수행된 소규모 수력펌핑양광실험 결과에 기초하여 30 m 급 육상 수력펌핑 양광시스템이 설계되었다.본 연구에서 수행된 고-액 2상 유동실험은 실제 망간단괴와 동일한 밀도를 가진 직경 20 mm의 모조단괴가 직경 100 mm의 양광관내를 물과 함께 유동할 때 최대 유속은 5 m/sec, 최대 고체체적점유율은 20%의 조건에서 수행되었다.본 실험으로부터 양광관 내에서의 고체체적점유율과 유동특성 간의 관계를 해석하였다.본 연구결과는 향후 수행될 근해역 채광실험과 실해역 채광시스템의 설계자료로 이용될 것이다.

참고문헌 (Reference)

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