한국해양대학교

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Tomographic-PIV와 Volume-PTV에 의한 실린더 후류 계측

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dc.contributor.author 문경록 -
dc.date.accessioned 2017-02-22T05:18:11Z -
dc.date.available 2017-02-22T05:18:11Z -
dc.date.issued 2010 -
dc.date.submitted 56932-07-09 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174461 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/8492 -
dc.description.abstract 3D-PTV (Volume PTV) measurements and Tomographic PIV measurements have been carried out for the measurements of the wakes around a cylinder. These techniques makes use of several simultaneous views of the illuminated particles and their 3D reconstruction as a centroid of particle for the volume PTV and as a light intensity distribution for the tomographic PIV. For 3D-PTV measurements, two-camera system has been adopted using the conventional photogrammetry technique and the particle tracking algorithm. For tomographic PIV measurement, the MART algorithm, two-camera system has been adopted using the tomographic concept for the images reconstructed by multiple cameras. In this tomographic PIV, a 3D array of light intensity is yielded and discretized over voxels, and the reconstructed tomogram pair is analyzed by means of 3D cross-correlation with an iterative multigrid volume deformation technique, returning the three-component velocity vector distribution over the measurement volume. Detailed process for these techniques are discussed and a parametric study is carried out by means of a computer-simulated volume-PIV procedure. The performances of the tomographic PIV technique have been discussed. In the performance test, a computer simulated experiment of a 3D particle motion field describing a vortex ring demonstrates the capability and potential of the proposed system with four cameras. The capability of the technique in real experimental conditions is assessed with the measurement of the turbulent flow in the wake of a circular cylinder at Reynolds 630. And then its results are compared with the results obtained by the volume PTV in same experimental condition. -
dc.description.tableofcontents 제1장 서 론 1 1.1 연구배경 1 1.2 연구목적과 구성 4 제2장 Tomographic PIV의 이론적 배경 6 2.1 PIV의 원리와 분류 6 2.1.1 PIV의 기본원리 6 2.1.2 PIV의 분류 6 2.2 3차원 계측의 원리 12 2.2.1 계측법의 원리 12 2.2.2 위치결정의 원리 14 2.3 Tomographic PIV (ART & MART method) 21 제3장 Tomographic PIV(MART)의 구축 및 성능평가 25 3.1 Core Vortex Simulation 25 3.2 가상영상을 이용한 Core Vortex 27 3.3 결론 및 고찰 65 제4장 Tomographic PIV와 Volume PTV를 이용한 실린더 후류 계측 66 4.1 실험장치 및 절차 66 4.2 Tomographic PIV와 Volume PTV의 실험결과 비교 69 제5장 결론 및 고찰 77 참고문헌 78 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title Tomographic-PIV와 Volume-PTV에 의한 실린더 후류 계측 -
dc.title.alternative A Measurement in the wake of a circular cylinder using Tomographic-PIV & Volume-PTV -
dc.type Thesis -
dc.date.awarded 2010-02 -
dc.contributor.alternativeName Moon Kyung Roc -
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냉동공조공학과 > Thesis
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