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논문 기본 정보

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(Pusan National University) (Pusan National University) (Pusan National University) (Pusan National University) (Pusan National University)
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한국전산유체공학회 한국전산유체공학회 학술대회논문집 한국전산유체공학회 2022년도 추계 국제학술대회 논문집
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    초록·키워드

    Ventilated supercavitation that creates efficiently a large cavity inside the fluid flow to completely cover objects traveling through it is one of the best techniques for reducing the skin friction acting on the submerged body's surfaces when it moves and has been being lots of attention owing to its potential in engineering applications. Besides, with the widespread use of modern technology in underwater vehicles, particularly, in naval applications, the artificial gas ejected from ventilated holes is normally heated because of engine operations. Though cavitation and ventilated supercavitation have attracted many interests and have been studied for a long time, studies on cavitating flow with thermal effects are still limited and mostly focused on ambient temperatures [1-3]. More recently, Pham et al. [4] have experimentally studied combustion hot-gas ventilated supercavitation. They showed that a high temperature has considerable effects on the fluctuation reduction of the supercavity compared with room temperature. The experiments also indicated that the temperature variation inside the supercavity depended on the ventilation gas rate, whereas the pressure remained constant after the minimum cavitation number was reached. Motivated by a further understanding of the flow field inside the ventilated hot-gas cavity, this study conducted simulations on cavitating flows around an axisymmetric conical body with diffe ... 전체 초록 보기

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