Plate fin - oval tube 표면에서 Delta Wing Vortex Generators에 의한 국소 열전달 특성

신석원(Seok-Won Shin),전영우(Young-Woo Jeon),고완욱(Wan-Wook Ko),정인기(In-Kee Chung),김수연(Soo-Youn Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10

In the present paper, the effect of delta-wing vortex generators(DWVGs) on heat transfer of the plate fin-oval tube heat exchanger was experimentally studied. The local heat transfer coefficient of the tube surface of one kind of DWVGs arrangement were measured by naphthalene sublimation technique for Reynolds numbers of 2000 ~ 3200 and angles of attack of DWVG of 30°~60°. As the results, compared to the case without DWVGs, the heat transfer of the plate fin surface with DWVGs was enhanced from upstream to downstream in the test region. The heat transfer were significantly affected by angles of attack of DWVGs as well as Reynolds number. It showed that the result of 45° was best within test angles.

Plate fin-oval tube 열교환기에서 와류발생체에 의한 fin 표면에서의 국소 열전달 특성

신석원(Seok-Won Shin),정인기(In-Kee Chung),김수연(Soo-Youn Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.6

The present research was experimentally performed to analyze the effect of delta-wing vortex generators(DWVG) on the heat transfer of fin surface of the plate fin-oval tube. The local heat transfer coefficient of the fin surface for four kinds of DWVG's arrangement was measured by the naphthalene sublimation technique for Reynolds numbers ran&ing from 2000 to 3200. The results showed that the heat transfer of the plate fin-oval tube can be significantly enhanced by DWVG for relatively low Reynolds numbers.

Plate fin - oval tube 표면에서 Delta Wing Vortex Generators에 의한 국소 열전달 특성

신석원(Seok-Won Shin),정인기(In-Kee Chung),김수연(Soo-Youn Kim),Young-Woo Jeon,Wan-Wook Ko 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-

In the present paper, the effect of delta-wing vortex generators(DWVGs) on heat transfer of the plate fin-oval tube heat exchanger was experimentally studied. The local heat transfer coefficient of the tube surface of one kind of DWVGs arrangement were measured by naphthalene sublimation technique for Reynolds numbers of 2000 ~ 3200 and angles of attack of DWVG of 30°~60°. As the results, compared to the case without DWVGs, the heat transfer of the plate fin surface with DWVGs was enhanced from upstream to downstream in the test region. The heat transfer were significantly affected by angles of attack of DWVGs as well as Reynolds number. It showed that the result of 45° was best within test angles.

Plate Fin-Oval Tube 열교환기에서 익형 와류발생체에 의한 Fin 표면에서의 국소 열전달에 대한 특성

신석원(Seok-Won Shin),정인기(In-Kee Chung),김수연(Soo-Youn Kim) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.10

In the present study, the effect of delta-wing vortex generators(DWVG) on the local heat transfer of the plate fin-oval tube was experimentally analyzed for Reynolds numbers for 2000, 2500 and 3200. The local heat transfer coefficient of the fin surface for four type DWVGs was measured by the naphthalene sublimation technique. As the results, the distribution of the heat transfer coefficient at rear of DWVGs showed longitudinal contours for common flow down DWVGs and wavy contours for common flow up DWVGs. The distribution showed many cell type contours at near wall and downstream for all DWVGs. Compared to case without DWVGs in present experimental tests, all DWVGs showed the best enhancement of heat transfer at Re=2000. Of 4 cases of DWVGs, D type showed the best enhancement of heat transfer.

청동기시대 장제의 지역성 연구 - 인골자료를 중심으로 -

신석원 ( Shin Seok-won ) (재)동아시아문물연구학술재단 동아시아문물연구소 2017 文物硏究 Vol.- No.32

청동기시대의 장제에 관한 기존 연구들은 거의 대부분이 인골의 검토가 제대로 이루어지지 않은 채 단편적이고 부수적으로 접근한 경우가 많았다. 이러한 문제점을 극복하고자 본 연구에서는 청동기시대의 유구에서 출토한 126개체의 인골을 연구대상으로 삼아 한국(남한지역) 청동기시대 장제의 지역성에 대해 접근을 시도해 보았다. 장제의 제요소 중 먼저 피장자의 인골에서 확인할 수 있는 매장방법 및 절차, 두향, 자세를 분류하였다. 그 결과 매장방법 및 절차에서 모두 6개의 유형을 구분 할 수 있었다. 그리고 두향을 8개 방위로 구분하고, 자세를 신전장과 굴장으로 나누었다. 분류한 각각의 요소들에 대해 수계별로 구분한 유역에 따라 분석을 시도하여, 공통적으로 나타나는 양상과 지역간 구분되는 차별적 양상을 확인할 수 있었다. 그리고 이를 통해 청동기시대의 사회상을 지역성과 관련하여 검토해 보았다. 그 결과 지역과 관계없이 매장방법에서는 매장과 화장이 주로 성행하였고, 두향과 관련하여서는 해가 지는 서쪽 방향을 기피하는 관념이 존재했음을 알 수 있었다. 한편 지역적으로는 특히 청동기시대 후기에 한정했을 때, 송국리문화권과 그 외 지역이 매장방법 및 절차상의 유형에서 서로 구분됨을 파악할 수 있었다. 이것은 화장이면서 일차장인 경우 각각 화장1a형과 화장1b형으로 상이하며, 소형 매장주체부에 행해진 이차장의 경우 각각 매장2형과 화장2형으로 대비되어 나타난다. 또한 양 지역의 내부에서도 수계별로 구분한 유역에 따라 매장과 화장의 비율이나 특수한 매장방법의 유무 등이 서로 다르게 나타남을 확인할 수 있었다. There were many cases that the existing researches on the funeral institution in bronze age approached fragmentarily and subsidiarily without which most of them properly examined the human remains. To overcome this problem, this study attempted the approach to the funeral institution of bronze age in South Korea by having the research subjects as 126 pieces of human remains that were excavated from the remains of bronze age. Among all elements of the funeral institution, first of all, it classified a burial method & procedure, head direction and a posture available for being confirmed in a human bone of a buried person. As a result, all of 6 types could be divided from a burial method & procedure. And the head direction was divided into 8 bearings. A posture was classified into Shinjeon-jang(伸展葬) and Gul-jang(屈葬). As for each of the sorted elements, a burial method & procedure, head direction and a posture were analyzed depending on the basin that was classified by water system. As a result of the analysis, it could confirm the aspect, which is shown in common in the former, and the differential aspect, which is divided by region. Through these analytical results, it figured out the social aspect of bronze age in relation to locality. First of all, in the locality of the funeral institution, a burial method was prevailed burial and cremation in common. With regard to head direction, an idea of avoiding west of the sun declining was confirmed to have existed. Also, the limitation to the latter part of bronze age led to what Songguk-ri culture sphere and other areas are indicated with the mutually different image in a burial method & procedural type. Even in the inside of each region, a different aspect was identified according to the basin that was classified by water system.

대구 가천동유적 출토 인골의 재검토

신석원(Seok-won Shin) 한국상고사학회 2018 한국상고사학보 Vol.99 No.-

Plentiful human skeletal remains have been unearthed from several excavation attempts at Gacheon-dong, Daegu where numerous stone-lined tombs of the Three Kingdoms period are densely located. However, in the process of physical analysis of the excavated human bones, it was identified that some data were mixed; therefore, it has been revisited. Objects that has been reviewed are human bones excavated from the No.1 to No.40 stone-lined tombs with confusion caused by the naming of ‘the ancient tombs at Gacheon-dong’ and ‘the additional ancient tombs at Gacheon-dong’, and the No.50 stone-lined tomb of ‘the ancient tombs at Gacheon-dong’ that were physically analyzed without considering the excavation site. As a result of reviewing human bones excavated from the No.1 to No.40, 26 individuals originally analyzed from 23 stone-lined tombs was revised 9 individuals from 9 stone-lined tombs of ‘the ancient tombs at Gacheon-dong’ and 22 individuals from 22 stone-lined tombs of ‘the additional ancient tombs at Gacheon-dong’. According to the review of the No.50 stone-lined tomb, an object originally regarded as an individual was revisited as each individual in the main chamber and the subordinate chamber. In addition, the corrected results were reflected and reorganized in the existing results that physically analyzed excavated human bones from ‘the ancient tombs at Gacheon-dong’ and ‘the additional ancient tombs at Gacheon-dong’. We also propose a possible relationship of an extraordinary example of the No.50 stone-lined tomb that found a skull piece with war, ceremony and so forth, not with sacrificial burial. 삼국시대의 석곽묘가 집중 분포하는 대구 가천동유적에서는 몇 차례의 발굴을 통해 상당수의 인골이 출토된 바 있다. 하지만 출토 인골의 형질분석 과정에서 일부 자료가 뒤섞인 정황이 확인되어 이를 재검토하였다. 재검토 대상은 ‘가천동 고분군’과 ‘가천동 추가 고분군’의 유적명칭에서 혼란이 야기된 1~40호 석곽묘 출토 인골과, 출토위치가 고려되지 않고 분석된 ‘가천동 고분군’의 50호 석곽묘이다. 1~40호 석곽묘 출토 인골에 대해 재검토한 결과, 기존 분석상 23기 석곽묘의 26개체를 ‘가천동 고분군’의 9기 석곽묘 9개체와 ‘가천동 추가 고분군’의 22기 석곽묘 22개체로 정정할 수 있었다. 또한 50호 석곽묘의 검토에서는 기존 1개체로 분석된 것을 주곽과 부곽에 각각 1개체인 것으로 바로잡을 수 있었다. 아울러 ‘가천동 고분군’과 ‘가천동 추가 고분군’ 두 유적 출토 인골의 기존 형질분석 결과에 새로이 정정된 부분을 반영하여 재정리해보았다. 그리고 50호 석곽묘 부곽에서 두개골편이 출토된 특이사례에 대해서도 순장이 아닌 전쟁, 의례 등과의 관련성을 제시해보았다

Delta Wing Vortex Generator가 부착된 Plate Fin-Oval Tube 열교환기에서 휜 주위의 유동에 대한 수치적 해석

신석원(Seok-Won Shin),정인기(In-Kee Chung),김수연(Soo-Youn Kim),이영우(Young-Woo Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

In present study, the flow field near the fin surface of plate fin - oval tube heat exchanger with delta wing vortex generator was numerically analyzed. As results, the well developed vortex behind delta wing was observed. These vortex can improve heat transfer fin surface behind delta wing vortex generators.

Plate fin-oval tube 열교환기에서 와류발생체에 의한 fin 표면에서의 국소 열전달 특성

신석원(Seok-Won Shin),정인기(In-Kee Chung),김수연(Soo-Youn Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5

The present research was experimentally performed to analyze the effect of delta-wing vortex generators(DWVG) on the heat transfer of fin surface of the plate fin-oval tube. The local heat transfer coefficient of the fin surface for four kinds of DWVG's arrangement was measured by the naphthalene sublimation technique for Reynolds numbers ranging from 2000 to 3200. The results showed that the heat transfer of the plate fin-oval tube can be significantly enhanced by DWVG for relatively low Reynolds numbers.

Delta Wing Vortex Generator가 Plate Fin - Oval Tube 열교환기에서 Fin 표면의 열전달에 미치는 영향

신석원(Seok-Won Shin),정인기(In-Kee Chung),김수연(Soo-Youn Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

The present research was experimentally performed to analyze the effect of delta-wing vortex generators(DWVG) on the heat transfer of fin surface of the plate fin-oval tube. The local heat transfer coefficient of the fin surface for four kinds of DWVG's arrangement was measured by the naphthalene sublimation technique for Reynolds numbers ranging from 2000 to 3200. The results showed that the heat transfer of the plate fin-oval tube can be significantly enhanced by DWVG for relatively low Reynolds numbers.

낮은 레이놀즈 영역에서의 딤플을 가진 평판 핀 사이의 유동에 대한 수치적 해석

도규회 ( Kyu Hoi Do ),신석원 ( Seok Won Shin ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.4

In present study, the effect of dimples on the flow between two plate-fins with dimples was numerically analyzed with Reynolds numbers from 150 to 2000. The dimples were applied to extend the fin surface area and to promote turbulent flow around plate-fins. The relatively strong vortices were generated in dimples and it will enhance heat transfer of plate-fins.