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추력벡터제어를 위한 이차 분사유동이 있는 2DCD 노즐 내부의 수치적 연구
이진규(JinGyu Lee),장근식(KeunShik Chang) 한국전산유체공학회 2002 한국전산유체공학회 학술대회논문집 Vol.2002 No.-
A numerical solution procedure has been developed to analyze the flow field resulted from the injection of a transverse jet through the divergent flap of a 2DCD nozzle for thrust vector control. The formulation employs the compressible Navier-Stokes equations in conservation law form and a two equation k-ω turbulence model. Detailed numerical results are presented in this paper for the 2DCD nozzle over a range of secondary to primary injection mass flow ratios and nozzle pressure ratios.
이진규(Lee Jingyu) 동아인문학회 2016 동아인문학 Vol.37 No.-
본고는 처용과 처용설화가 문인들의 시문학에 수용된 양상을 고찰한 글이다. ≪삼국유사≫에 소개된 처용과 설화는 후대로 전승되어 고려후기 이제현 ‘소악부’에 <처용>으로 의역되어 재창작되었고, 이숭인의 시에는 우국에 대한 심경이 태평성대를 구가하며 불렸던 신라 <처용가>에 대비하여 표현된 것으로 보았다. 아울러 예전의 악보인 ‘구보(舊譜)’대로 전해온 노래를 들었다는 시어로 인하여 새 노래 ‘신보(新譜)’가 있었을 것으로 추정하기도 하였다. 이후 이색의 시들은 국가행사・군신연・나례의식 등의 행사에 묘사되어 나타났다. 고려시대 문인들의 작품에 처용이 등장하기까지 사료를 통하여 그 추이를 부연해 보았다. 조선시대에는 처용과 설화가 영사악부 문인들에 의해 수용되었다. 영사악부는 우리나라의 역사를 소재로 ‘제목-사화-작품(인식)’라는 구성을 통하여 포폄(褒貶)을 가하는 특징이 있는데 그들의 작품에도 인식, 곧 사평이 투영되어 있었다. 그들에게 처용과 설화가 수용된 양상은 세 가지로 나타나는데, 먼저 처용의 부정과 신라 위정자 비판, 다음은 처용은 긍정하되 신라 위정자의 비판, 그리고 처용의 예찬 등이다. 첫 번째는 처용무를 궁중에 만연하게 하여 어지럽게 만든 처용이 부정되고, 이에 빠져 탐락을 일삼았던 위정자들 또한 비판의 대상이 되었다. 또한 처용에게 벼슬을 내릴만한 자격이 있었는지 의문을 제시하고 또 벼슬을 내린 위정자의 인사등용에 대한 부정의식을 드러낸 작가도 있었고 처용만을 부정하고 정치현실에 대해서는 표현하지 않은 작품도 있었다. 두 번째는 임금의 성덕을 축원하고 또 경계를 일러주었던 처용은 긍정되되 신라의 정치상황과 현실은 풍자 또는 비판의 대상이 되었다. 또한 신라의 정치상황이 자신들의 현실상황에 비유되거나 한탄이 표현되기도 하였다. 세 번째는 처용이 태평성대에 구가(謳歌)되었기에 전승되어야한다는 인물로 예찬되거나 우리 음악의 전승에 의미를 두기도 하였다. 처용과 설화를 수용한 작품들을 발췌하여 본고에서 새롭게 영사악부로 인정하여 살펴보았다. This is a study on how Cheoyong and Cheoyong Story have been accepted by writers for their poetry. Cheoyong and his story which was introduced in the Heritage of the Three States were handed down to posterity, translated liberally and rewritten as <Cheoyong> in the song of ‘So-ak-bu’ by Yi Je-hyun in the latter part of Goryeo period, and regarded in the poem of Lee Sung-in as an expression of patriotism compared to <Cheoyong-ga> of Silla dynasty which was sung to enjoy the reign of peace. And they even assumed that there might have been ‘Shin-bo’, a new music, considering there was the poetic word that people listened to the song which was passed down as per the old music of ‘Gu-bo’. Afterwards, Lee Saek’s poems appeared with description in the ceremonies such as event of state, banquet for the ruler and the ruled, Na-re rite (a ritual held to drive out the ghost since the Silla era), and so forth. Through historic records, this study attempted to add its development until the appearance of Cheoyong in the works of the writers in Goryeo era. Cheoyong and his story was accepted by the writers of Yeong-sa-akbu(a music administrative office) in the dynasty of Joseon. As Yeong-saak-bu has characteristics to criticize through the formation of ‘title historical story-work(awareness)’ based on our history, awareness, i.e. history evaluation, was reflected in their works as well. The types that they accepted Cheoyong and his story are featured in three kinds, and the first one goes to both the denial of Cheoyong and criticism on the politicians of the Silla dynasty, and next one to acceptance of Cheoyong but criticism on the politicians of the Silla dynasty, and admiration for Cheoyong, and so on. The first was that Cheoyong who made Cheoyongmu(a kind of dance) prevalent in the court and messed it up was denied, and the politicians who were trapped in the dance and greedy habitually for seeking pleasure were also the target to be criticized. And more, there were writers who questioned whether Cheoyong was qualified to be entitled with government post, and they showed negative opinions on the personnel appointment made by the politicians who bestowed the post on him, and there were works as well which denied only Cheoyong but did not express anything on the reality of politics. The second was that the flourishing virtues of king were prayed, and Cheoyong who gave the king pieces of advice for wariness was accepted, but the situation and reality of politics of Silla came to the target of satire and criticism. And, the political situation of Silla was compared to their situation of reality, or expressed as their regret. The third was that they admired Cheoyong as a person who had to be passed down to the next generations due to the reason that he was sung in the reign of peace, or they emphasized it as a transmission of our music. We collected and studied the works that had accepted Cheoyong and his story after newly recognizing them as ‘Yeong-sa-ak-bu’ in this study.
정영국(Youngguk Jung),이진규(Jingyu Lee),이주한(Juhan Lee),서태범(Taebeom Seo) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The purpose of the research is to develop the high performance solar air receiver. Four different air receiver are suggested: three way type, spiral type, porous type, module type. The performances of these receivers are numerically estimated and experimentally measured. Using 128 core parallel computing machine, convection, conduction, radiation are calculated simultaneously. The transient temperature and concentration information is obtained from the calculation. The numerical results are compared with the experimental results. Good agreement is obtained. Four receiver are installed on the dish-type solar thermal system of Inha University. The temperatures, mass flow rates, pressure are measured. At the same condition, The three way type receiver was similar performance the spiral type receiver does. However, the spiral type receiver gives reasonably good performance without any problems caused by highly concentrated solar radiation.
수치해석 기법을 이용한 자동차 헤드램프 렌즈의 습기발생 기초연구
오상준(Sangjune Oh),이진규(Jingyu Lee),이주한(Juhan Lee),우창완(Changoan Woo),김종복(Jongbok Kim),서태범(Taebeom Seo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In order to predict the water vapor condensation characteristics which occurs on the inside of the automobile headlamp lens, the CFD analysis was used in this study. Water vapor condensation on the inside surface of the head lamp lens is an essential factor that affects secure front view and headlamp life. One of the headlamps of automobile which is one of the most popular in Korea was chosen for the present analysis. In the basis of the experimental data of automobile given by a manufacturer, boundary conditions were defined and free convection of the air inside the headlamp and radiation from the bulb to the other surfaces are considered. As a result, temperature distribution of the inside surface of the headlamp lens are approximately the same as the experimental result.
김태준(Kim Taejun),오상준(Oh sangjune),이진규(Lee jingyu),서태범(Seo Taebeom) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study focus on verification of the thermal efficiency of volumetric receiver with 5㎾th Dish-type solar thermal system. Spiral flow path shaped on receiver and working fluid(steam) flow along the this flow path. Porous material for radiation-thermal conversion used in former researches are substituted with the stainless steel wall installed along the spiral shaped flow path. Numerical analysis for the flow path and temperature distributions are carried out. Numerical results are compared with experimental data. Using the numerical model, the heat transfer characteristics of spiral type receiver for dish-type solar thermal systems are known and the thermal performance of the receiver can be estimated.