• 제목/요약/키워드: curved type

검색결과 389건 처리시간 0.029초

성인 비만 여성의 체간부 체형연구 (A study on the torso body shape of obesity women)

  • 최혜선;이진희
    • 복식
    • /
    • 제38권
    • /
    • pp.279-288
    • /
    • 1998
  • The purpose of this paper was to find out obese women's respective characteristics of torso body shape. The subjects were 132 obese women for direct measurement and were 101 obese women for indirect measurement, age of 20~59. The criterial of obesity base on Rohrer index($\geq$1.6) and busts girth ($\leq$90). The results were as follows : 1) In comparison with the average body shapes in common body types, in 30's was bigger in the bust and waist girth than the different age groups. 2) According to the difference in the basic girth(bust and waist girth, hip and bust girth, hip and waist girth) the body types were classified 2 groups. Types 1 was large bust and slightly curved from waist to hip. Type 2 was large hip and larger in the curve from waist to hip than type 1.

  • PDF

해외철도 노선선정 사례의 검토 (Review Study on the Selection of Oversea Railway Alignment)

  • 최병표;김군수;권영철;김동기;조희수
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2006년도 추계학술대회 논문집
    • /
    • pp.402-406
    • /
    • 2006
  • There are two types of railway alignment design. First type is a modification of existing railway and second type is a planning of whole new alignment. Modification of existing railway would be more simpler, usually, main scope is improving a capacity with adopting standard track gauge, straighten intensively curved part. But planning new alignment should be considered various factors, not only topographic feature, but cultural, socio-economical, environmental factors. This paper is based on the performed project in the United Arab Emirates, the Arabian Peninsular, with Korea railroad corporation, Korea Rail Network Authority, and other skilled Korean design firms participated on May, 2006.

  • PDF

임펠러 직경비 및 리어가이더 형상변화가 횡류홴 성능에 미치는 실험적 연구 (Experimental Study on the Performance of a Cross-Flow Fan with Various Diameter Ratios of Impeller and Rearguider Shapes)

  • 김형섭;김동원;윤태석;박성관;김윤제
    • 유체기계공업학회:학술대회논문집
    • /
    • 유체기계공업학회 2003년도 유체기계 연구개발 발표회 논문집
    • /
    • pp.391-396
    • /
    • 2003
  • A cross-flow fan relatively produces higher dynamic pressure at low speed because a working fluid passes through an impeller blade twice and blades have a forward curved shape. The performance of a cross-flow fan is influenced 25% by the impeller, 60% by the rearguider and the stabilizer, and 15% by the heat exchanger. At the low flow rate, there exist a rapid pressure head reduction, a noise increase and an unsteady flow against a stabilizer and a rearguider. The purpose of this study is to investigate the reciprocal relation among each parameter Experiments are conducted to study the effects of a rearguider and a diameter ratio of impeller on the performance analysis of a cross-flow fan. Comparing with the rearguider of radial type, the Archimedes type shows excellent results for various diameter ratios.

  • PDF

도로소음원에 대한 방음패널 형상별 반사소음 저감효과 (A Reduction Effect in Noise Reflection by Different Shapes of Soundproofing-panel)

  • 김일호;박태호;장서일;이혜인
    • 대한환경공학회지
    • /
    • 제37권2호
    • /
    • pp.120-125
    • /
    • 2015
  • 도시화의 가속화와 더불어 도심의 교통량의 증가로 도로소음피해를 최소화하기 위하여 방음벽의 설치 수요가 증가하고 있다. 설치되고 있는 여러 형태의 방음벽 중, 반사형 방음패널의 경우 불투명 방음패널과 달리 시야를 가리지 않으므로 방음시설을 요구하는 거주자들에게 인기를 얻고 있다. 하지만 반사형 방음패널의 경우, 반사음에 의한 2차 피해를 유발시켜 피해를 줄일 수 있는 방음벽 개발의 필요성이 대두되고 있다. 이에 본 연구에서는 반사형 방음패널의 전면형상 및 기하학적 형태를 변화시켜 반사음의 전달을 최소화 시킬 수 있는 형상을 연구하였다. 일반형 반사형 방음패널과 형상별 방음패널의 반사소음 저감 효과를 비교 한 결과, 곡선형 방음패널이 1.5 dB의 소음저감 효과가 있었다. 또한, 반사음의 증가 또는 감소는 형상별 설계인자에 따라 변화하는 것을 알 수 있었다. 이러한 결과는 방음벽 전면 현상에 따른 반사소음의 저감 기술의 가능성을 보여주는 결과라고 판단된다.

한국 20대 전반 여성의 체간부 체형 분류 (Torso Body-Type Classification of Korean Women in Their Early Twenties)

  • 신장희;손희순
    • 복식문화연구
    • /
    • 제19권1호
    • /
    • pp.176-190
    • /
    • 2011
  • Today's young generation in digital era has a rich education environment and convenient life, on the other hand, there was negative impact on growth as normal body type because of adverse impact on an excessive study and insufficient exercise, etc. Also, for these people in IT culture generation, using small mobile including computer for long time is becoming main issue as changing factor in posture and body type in terms of spine like their neck disc. This body-typed characteristic reaches to normal adult body type in the process of physical development of adult woman and has least modification in body type. Therefore, despite of early young generation, body suitability of upper body clothes might caused imbalance. So, for intended to early 20s women, to design clothes with consideration on imbalance of body type by bended and curved spine, body type studies about size of upper body and forms are needed. As this researcher measured the body type of early 20s college women in metropolitan area, changes in body type of young generation with use of digital equipment recently were recognized since straight body type was decreased unequally and had characteristic in terms of changes to be bended body type. The changes of these body type should be considered to make clothes. Also, since there are some restrictions on this research objects in terms of local and numbers of measured objects, a broad interpretation of result on this research should be really careful.

조선왕릉의 신로(神路)·어로(御路) 형식에 관한 연구 - 비정형(非定型) 신로·어로를 중심으로 - (A Study on the Type of Sinro·Eoro in Joseon Royal Tombs - Focused on the Type of Irregular Sinro·Eoro -)

  • 김규연;정기호;최종희
    • 한국전통조경학회지
    • /
    • 제29권1호
    • /
    • pp.38-49
    • /
    • 2011
  • 본 연구는 조선왕릉의 입지 및 공간구성의 특성을 파악하기 위한 기초연구로 조선왕릉 내 신로 어로 형식의 구명을 목적으로 한다. 조선왕릉 신로 어로의 형식은 진입로-홍살문-정자각의 관계에 의하여 정형(定型)과 비정형 (非定型)으로, 비정형은 다시 굴절형(屈折型)과 분절형(分節型)으로 구분된다. 또한 선로 어로의 길이와 비정형 신로 어로의 유무에 따라 신로 어로의 조성 유형을 전기, 과도기, 후기로 구분하였으며, 전기에 정형의 경우 건원릉의 신로 어로가 최소 길이 기준으로 작용한 것으로 파악되었다, 비정형 신로 어로가 나타나는 정릉(貞陵, 신덕왕후) 현릉(顯陵) 목릉(穆陵) 장릉(莊陵, 단종) 영릉(寧陵, 효종)의 경우, 지형 및 수계가 형식을 결정하는 주요 인자로 파악되었다. 즉, 조선왕릉의 신로 어로는 건원릉 신로 어로의 길이를 기본적 준거로 해당 조선왕릉의 지형 및 수계에 부합하는 형태를 가진다.

가상 인체 모델링을 위한 전신 체형 연구 - 20-30대 비만여성을 중심으로 - (Whole Body Shape Analysis for Virtual Human Body Modeling - Focusing on obese women in their 20s and 30s -)

  • 홍은희;윤지원
    • 한국의상디자인학회지
    • /
    • 제25권4호
    • /
    • pp.147-161
    • /
    • 2023
  • This study used 3D anthropometric data from the 8th Size Korea to type and analyze whole body shapes of obese women in their 20s and 30s, and constructed dimensional data for human body items needed to create a 3D human body model for each type. The data analysis used data from 148 obese women in their 20s and 30s, and a total of 48 index values, drop values, and angle items were subjected to factor analysis and one-way variance analysis to categorize body types and verify significant differences by type. As a result of the factor analysis, 12 factors were extracted and divided into 4 body types. Type 1 is a 'standard type with a curved torso with balanced upper and lower body lengths', Type 2 is a 'bending forward type with a short, thick lower body, and an uncurved torso', Type 3 is a 'lean back type with a long and thin lower body and an H-shape torso', Type 4 is a 'sway back type with a long and thick lower body and abdominal obesity'. The representative body type of obese women in their 20s and 30s was identified as Type 1. The constructed body shape information will be used as basic data for future 3D human body modeling.

100kW급 보조동력장치용 압축기 성능시험 (Performance test for the compressor of 100kW APU)

  • 임병준;차봉준;양수석;이경진;백기영
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2001년도 춘계학술대회논문집E
    • /
    • pp.655-660
    • /
    • 2001
  • The performance test of a centrifugal compressor for APU(Auxiliary Power Unit) which is developed by the collaborative research of KARI and Samsung TechWin has been conducted. The investigated compressor consists of a curved inlet, a centrifugal impeller, a channel diffuser and a plenum chamber. The experiments were carried out in an open-loop centrifugal compressor test rig driven by a turbine. For three different diffusers, overall performance data were obtained at 80%, 90% and 97% of design speed. For the initially designed wedge-type diffuser, test results showed that the compressor was operated at a higher mass flow rate than the design requirement. By reducing the diffuser throat area, the compressor operating range was shifted to lower mass flow rate range. The test result of redesigned wedge-type diffuser showed high pressure loss. To reduce the diffuser loss, diffuser inlet radius was increased and airfoil-type of diffuser was adopted. This airfoil-type diffuser showed reasonal results in terms of design requirement.

  • PDF

U-자형 곡관내의 유동특성에 대한 수치해석적 연구 (NUMERICAL SIMULATION OF THE FLOW CHARACTERISTICS INSIDE A U-TYPE TUBE)

  • 고동훈;강동진;송동주
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2009년 춘계학술대회논문집
    • /
    • pp.97-103
    • /
    • 2009
  • A numerical study of the flow characteristics inside a U-type circular tube is carried out in this paper. The numerical simulations carried out by using a Navier-Stokes code which is commercially available. Before detailed numerical simulations, validation of present numerical approach is made by comparing numerical solutions with experimental data. Numerical simulations are performed to study the effect of curvature on the flow characteristics inside a U-type tube. Numerical solutions show that a significant effect on the secondary flow structure in the cross section of the tube, especially in the curved section is shown when the curvature ratio, ratio of curvature to tube diameter, is smaller than about 3.5. As the curvature ratio decreases below 3.5, a counter rotating vortex is found below the primary vortex in the cross section of the tube. Another dramatic change of the flow structure is the formation of streamwise separation zone when the curvature ratio is decreased below 1.25.

  • PDF

U-자형 곡관내의 유동특성에 대한 수치해석적 연구 (NUMERICAL SIMULATION OF THE FLOW CHARACTERISTICS INSIDE A U-TYPE TUBE)

  • 고동훈;강동진;송동주
    • 한국전산유체공학회지
    • /
    • 제14권3호
    • /
    • pp.105-114
    • /
    • 2009
  • A numerical study of the flow characteristics inside a U-type circular tube is carried out in this paper. The numerical simulations carried out by using a Navier-Stokes code which is commercially available. Before detailed numerical simulations, validation of present numerical approach is made by comparing numerical solutions with experimental data. Numerical simulations are performed to study the effect of curvature on the flow characteristics inside a U-type tube. Numerical solutions show that a significant effect on the secondary flow structure in the cross section of the tube, especially in the curved section is shown when the curvature ratio, ratio of curvature to tube diameter, is smaller than about 3.5. As the curvature ratio decreases below 3.5, a counter rotating vortex is found below the primary vortex in the cross section of the tube. Another dramatic change of the flow structure is the formation of streamwise separation zone when the curvature ratio is decreased below 1.25.