한국해양대학교

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하이브리드 입자추적유속계의 구현과 이를 이용한 자유수평축 조류발전시스템 유동 해석

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dc.contributor.author 이재민 -
dc.date.accessioned 2017-02-22T07:14:57Z -
dc.date.available 2017-02-22T07:14:57Z -
dc.date.issued 2011 -
dc.date.submitted 56959-08-17 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002176155 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/10513 -
dc.description.abstract A new hybrid PTV algorithm in which a linear transformation was adopted, was constructed and its performances were validated. For the performance test, a set of numerical data on the Taylor-Green vortex flows was used. Using the data sets, artificial images were generated. In the test, the constructed hybrid PTV algorithm showed the best performance in the case where the particle number density was more than 4,000. In order to validate the applicabilities of the constructed hybrid PTV algorithm, it was used for the measurements of the rectangular wake flows. Further, the conventional PIV and PTV techniques were used for the measurements of the same flow fields for comparison. The vortical structures of the rectangular wake flows were compared with those obtained by the conventional PIV, a PTV technique (2-frame match probability), and by the constructed hybrid PTV algorithm. A numerical simulation (CFD) was carried out for the same rectangular wake flows in order to compare the results with those obtained by the PIV, the PTV, and the constructed hybrid PTV algorithm -
dc.description.abstract through which it was verified that the pressure distribution at the rear part of the S type blade was much more uniform than those of A and SE models. This implies that the S type loses much more kinetic energy in the blade wake. This result was affirmed by electric power[W] meter measurements. It was shown that the constructed hybrid PTV algorithm can be intensively used for the flow measurements of the free- horizontal-axis tidal power generation system. Following is the structure of this paper: In the first chapter, the research background and the purpose of the paper were mentioned. In the second chapter, the principles of the PIV and PTV techniques were mentioned, and the newly constructed hybrid PTV algorithm was explained in detail. The results of the performance test on the constructed hybrid PTV algorithm were mentioned. In the third chapter, an experiment on a rectangular wake was carried out in order to evaluate the performance of the constructed hybrid PTV algorithm. The results by the gray-level cross-correlation PIV and the 2-frame based PTV were also discussed for comparison with those obtained by the constructed hybrid PTV algorithm. In the fourth chapter, a practical application of the constructed hybrid PTV algorithm was made. The flow features around the blades of the free-horizontal-axis tidal power generation system were investigated. Lastly, summaries were made emphasizing the benefits of the constructed hybrid PTV algorithm for industrial applications. -
dc.description.abstract it was used for the measurements of the vortical structures of a free- horizontal-axis tidal power generation system. In the tests, three different models (A, S, SE) were used, and the measured velocity was used for constructing the velocity diagram based upon the momentum theory. The results attested that the SE model showed the highest output power at the same blade angles among A, S and SE models. Further, it showed that the SE model showed good performances of power generation under fast current speeds and the S model showed good performances under slow current speeds. Using the same shape model, higher blade angle showed higher power generation. The pressure fields were calculated using the velocity vector fields -
dc.description.abstract through which it was verified that the constructed hybrid PTV algorithm results showed better compatibility with those obtained by the CFD simulation. Validating the constructed hybrid PTV algorithm -
dc.description.tableofcontents 제1장 서 론 1 1.1 연구배경 1 1.2 연구목적 5 1.3 연구내용 6 제2장 하이브리드 입자추적유속계 9 2.1 PIV, PTV 방법의 원리 9 2.1.1 PIV 방법의 원리 9 2.1.2 PTV 방법의 원리 12 2.2 하이브리드 입자추적유속계의 원리 19 2.3 가상영상의 구축 30 2.4 하이브리드 입자추적유속계 알고리즘의 성능 비교 분석 32 제3장 사각주 후류 측정적용에 의한 실용성 성능 평가 44 3.1 실험장치 및 방법 44 3.2 결과 및 비교 46 3.2.1 속도장 비교 46 3.2.2 와도장 비교 53 제4장 자유수평축 조류발전시스템 56 4.1 조류발전의 개요 56 4.2 자유수평축 조류발전시스템의 모델의 개요 59 4.3 발전특성 분석 63 4.4 유동해석 결과 및 고찰 73 4.4.1 속도장 분석 73 4.4.2 운동량이론과 성능 분석 78 4.4.3 와도장 분석 98 4.4.4 압력장 분석 102 제5장 결론 107 참고문헌 109 -
dc.language kor -
dc.publisher 한국해양대학교 -
dc.title 하이브리드 입자추적유속계의 구현과 이를 이용한 자유수평축 조류발전시스템 유동 해석 -
dc.title.alternative Construction of a Hybrid PTV and its Application for the Flow Analyses of a Free-Horizontal-Axis Tidal Power Generation System -
dc.type Thesis -
dc.date.awarded 2011-02 -
dc.contributor.alternativeName Lee Jae Min -
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기계공학과 > Thesis
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