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NTIS 바로가기한국자동차공학회논문집 = Transactions of the Korean Society of Automotive Engineers, v.19 no.3, 2011년, pp.130 - 137
권혜림 (한국항공대학교 항공우주 및 기계공학과) , 황교식 (한국항공대학교 항공우주 및 기계공학과) , 장석필 (한국항공대학교 항공우주 및 기계공학부)
Experimental investigations are conducted to figure out the feasibility of
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핵심어 | 질문 | 논문에서 추출한 답변 |
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동일 전단응력일 때 0.3~3%의 부피비를 가지는 나노유체의 점성 계수는 부피비와 어떤 상관관계를 가지는가? | 6과 7에서 보듯이 동일 전단응력일 때 0.3~3%의 부피비를 가지는 나노유체의 점성 계수는 부피비가 높을수록 증가하는것을 확인할 수있다. | |
냉각 유로의 소형화가 가지는 한계는? | 이런 이슈들에 의해 기존 냉각유로를 소형화함으로써 열전달성능을 향상 시켜 연비 향상을 이룰 뿐만 아니라 이산화탄소 배출량을 줄이려는 시도가 계속되고 있다.1) 하지만 여전히 냉각 유로의 소형화는 냉각수를 냉각 유로로 흐르게 하는데 필요한 펌핑파워(Pumping Power)를 매우 증가시키게 되어 실제 연비 개선에 한계가 있음이 보고되고 있다.2) 따라서 동일한 펌핑파워(Pumping Power) 조건에서 연소실 냉각성능 증가시킬 수 있는 새로운 돌파구가 필요한 시점에 있다. | |
나노입자를 유체 속에 분산, 부유시킨 나노유체의 우수성은 무엇인가? | 나노입자를 유체 속에 분산, 부유시킨 나노유체가 개발되었으며 그 유체의 특성이 지난 10여 년간 많은 연구자들에 의해서 실험 및 이론적으로 제시되었다. 그 결과에 의하면 일반 열전달 유체보다 열전달 특성 즉 열전도도 및 대류열전달 계수가 우수하다고 보고하고 있다.3-11) 특히 최근에 Beck et al. |
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