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- 저자 : 정재철 ( Jaechul Jeong ) (검색결과 4 건)
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전단 유동에 의한 스월 제트의 미립화 및 분무특성 향상
정재철(Jaechul Jeong),윤웅섭(Woong-sup Yoon) 한국추진공학회 2009 한국추진공학회 학술대회논문집 Vol.2009 No.5
아음속 영역의 대류에 평행하게 압력형 스월 제트를 분사시켜 액막 분열 및 액적 크기와 분포를 실험적으로 측정하였다. 대류로 인한 거시적과 미시적인 분무 특성의 영향을 제트 ??수와 기상에 대한 액상의 운동량 비를 사용하여 광학적인 방법으로 측정하였다. 낮은 제트 ??수일 때는 제트의 원심력 부족으로 인해 액막을 형성하지 못하고 Rayleigh 제트 분열을 하게 된다. 높은 ??수에서는 거시적인 분무 특성은 대류의 영향을 거의 받지 않지만 미시적인 분무 특성은 운동량 비가 높을수록 2차 미립화 과정을 통해 대류의 영향을 많이 받았다. 대류는 제트의 분열을 촉진시키고 스월 제트의 분무 특성을 향상하는 것으로 관찰되었다. Breakup and spray formation of pressure-swirl liquid jets injected into a low-speed convective-flow are experimentally investigated. Effects of the cross-flows on the macroscopic and microscopic spray parameters are optically measured in terms of jet Weber number and liquid-to-gas momentum ratio. The liquid stream undergoes Rayleigh jet breakup at lower jet Weber numbers and a liquid sheet isn"t formed because of the weak radial velocity in the swirl jet. At higher jet Weber numbers, the macroscopic spray parameter is a very weak function of the momentum ratio but the effect of the convection on the microscopic spray parameter is significant through the secondary breakup with increasing in the liquid-to-gas momentum ratio. The convective-flow promotes bag/plume breakup and the spray formation, and its effect is more distinct at higher momentum ratio.
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여성복 슬림 핏 테일러드 재킷의 맞음새 향상을 위한 패턴 개발 - 국내 30대 여성 체형을 중심으로 -
정재철 ( Jaechul Jeong ),박선경 ( Sunkyung Park ),어미경 ( Mikyung Uh ) 복식문화학회 2015 服飾文化硏究 Vol.23 No.4
The recent fashion market failed to satisfy the needs of female customers in their 30s who are demanding a slim jacket that makes the wearer look young and slim. Accordingly, the slim-fit jackets of domestic brands targeting the women in their 30s were collected to conduct look and movement fitting evaluations based on the standard somatotype, and a slim-fit tailored jacket prototype was developed based on the present findings. This research aims to increase the satisfaction level of the slim-fit jacket customers reflecting a variety of somatotypes of women in their 30s. The research process was developing jacket patterns fully reflecting the properties in terms of extra space and design lines for different somatotypes of women in their 30s based on the jacket pattern formulated through the advanced research, and then suggesting pattern design methods for the different somatotypes. In this sense, this research attempted to identify the problems concerning the slim-fit tailored jacket fitting for different somatotypes of women in their 30s. The main aim was to suggest ways to improve the customers’ satisfaction level regarding the fit, and enable the manufacturers to produce a well-fitting jacket reflecting the peculiarities of each somatotype.
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슬림 핏 테일러드 재킷 원형 개발 연구 -30대 여성 표준체형을 중심으로-
정재철 ( Jaechul Jeong ),박선경 ( Sunkyung Park ),어미경 ( Mikyung Uh ) 복식문화학회 2015 服飾文化硏究 Vol.23 No.3
Reflecting the consumer’s desire to look young, the “down-aging” trend, which blurs the distinctions between age groups, is the latest craze in the fashion market. The popularity of this trend made brand identities similar, resulting in customers becoming more interested in segmented notions of fashion (in terms of the story, design, high-quality material, etc.) regarding the product, and in particular, focus has become oriented to the fitness to the human body. In this sense, the researcher aimed to develop the prototype of a slim-fit tailored jacket that fits the standard somatotypes of women in their 30s well. For the purpose of this research, slim-fit tailored jackets from existing brands were collected and analyzed, and a subsequent wearability test was conducted based on the standard somatotype of women in their 30s. The research patterns were prototype of the developed slim fit tailored jacket are bust size of 3.8 cm, waist of 7 cm, and hip size of 3.8 cm. Then the research patterns were selected to develop the prototype of a properly fitting slim-fit tailored jacket. As outlined above, the development of a slim-fit tailored jacket prototype for the standard somatotypes of women in their 30s was conducted by solving the fitness issues of existing brands in order to produce properly fitting jackets that satisfy consumers.
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연구논문 : 슬림 핏 테일러드 재킷의 소비자 착용실태 및 선호 조사연구 -30대 여성 체형별 비교 중심으로-
정재철 ( Jaechul Jeong ),박선경 ( Sunkyung Park ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.4
This study aims to provide the basic reference necessary in improving the fitness of a ready-to-wear brand jacket through a research on the wearing conditions and preferences regarding a tailored jacket by body shape of the women in their 30s. The following results were drawn by implementing the research method of the self-administered type survey targeting 201 women in their 30s from August 14~28, 2014. First, the female consumers in their 30s preferred one button slim fit jacket when purchasing a tailored jacket and chose a close-fitting size. Second, the slim fit tailored jacket consumers preferred a jacket with some extra portion in the bust and hip areas but tightly fit in the waist area. Third, when purchasing a jacket under the ready-to-wear size system, the women with a triangle shape similar to a standard body silhouette had less instances of mending a jacket while the women with a big or small rectangle shape different from a standard body silhouette had more experiences of mending a jacket. Accordingly, it is expected of the manufacturers to increase the fitness satisfaction of the consumers by identifying the problems concerning the fitness and suggesting the improvement plans to produce a jacket of a good fitness reflecting the properties of different body shapes through such research on the wearing conditions and preferences regarding a tailored jacket by body shape of the women in their 30s.
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