• Title/Summary/Keyword: 프롭

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해외뉴스

  • Korea Aerospace Industries Association
    • Aerospace Industry
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    • s.88
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    • pp.52-53
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    • 2005
  • 보잉, 호주 AEW&C 항공기의 첫 레이더 비행 테스트 성공/이스라엘 공군, 최초의 G550 신호정보기 인수/터보프롭 리저널기 부활/유럽, 무인기 개발노력 가속화 /초음속 여객기 개발 전쟁/인도, 2008년 우주선 쏜다/NASA,2018년 달에 우주선 발사/

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변모하는 지역항공기 업계

  • 한국항공우주산업진흥협회
    • Aerospace Industry
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    • v.67
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    • pp.34-37
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    • 1999
  • 지역 항공기의 세계가 소연한 양상을 보이고 있다. 그것은 주요한 항공기 제작사들이 일제히 새로운 제트 기종의 개발에 나서고 있기 때문이다. 사실 초음속여객기인 콩코드기가 미국과 유럽간의 부정기노선에 취항한지도 어언 30년 가까운 시기에 이르고 세계의 전 국제선과 장거리 국내선이 모두 제트화된 오늘까지도 각국의 지역항공만은 일부가 제트화 되었을뿐 터보 프롭이 대부분을 이루고 있었다.

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Design on High Efficiency and Light Composite Propeller Blade of High Speed Turboprop Aircraft (고속 터보프롭 항공기용 고효율 경량화 복합재 프로펠러 블레이드 설계 연구)

  • Kong, Chang-Duk;Lee, Kyung-Sun;Park, Hyun-Bum;Choi, Won
    • Journal of the Korean Society of Propulsion Engineers
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    • v.16 no.3
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    • pp.57-68
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    • 2012
  • In this study, designs of the high efficiency composite propeller blade for a high speed turboprop aircraft, which will be used for a next generation regional commercial aircraft in Korea, are performed. Both the vortex theory and the blade element theory are used for preliminary aerodynamic design and performance analysis of the propeller. Then the aerodynamic design result is confirmed through performance analysis using a commercial CFD code, ANSYS. The carbon/epoxy composite materials is used, and the skin-spar-foam sandwich type structure is adopted for improvement of lightness and structural stability. Finally, it is investigated that the proposed propeller blade has high efficiency and structural safety through both aerodynamic and structural analysis and experimental test of a prototype propeller blade.

Investigation of Fuel Filter Contamination for Turboprop Engine (터보프롭 엔진 연료필터 오염 원인 탐구)

  • Lee, Hyeongwon;Jo, Hana;Lee, Chungryeol
    • Journal of the Korean Society of Propulsion Engineers
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    • v.23 no.6
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    • pp.87-94
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    • 2019
  • This paper contains the process of investigating the cause of fuel filter contamination of P&WC's PT6A-67A engine. An outline of the fuel filter contamination and configuration of the fuel supply line are specified. The analytical methods were classified into fuel component analysis and solid sediment analysis(EDX, TGA, optical microscope). In summary, the sulfur was detected from fuel tank sealant as a major contamination component. As a follow-up, P&WC and the Agency for Defense Development will conduct engine fuel filter cycle checks and fuel tank cleaning for engine operation.

CFD Analysis of Aerodynamic Characteristics of Regional Turboprop Aircraft Propeller (중형 터보프롭 항공기급 프로펠러 공력특성 전산해석)

  • Choi, W.;Choi, J.S.;Jung, I.M.;Kim, J.H.;Lee, I.W.;Han, S.H.;Won, Y.S.
    • 한국전산유체공학회:학술대회논문집
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    • 2011.05a
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    • pp.447-452
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    • 2011
  • Propeller shall have high efficiency and improved aerodynamic characteristics to get the thru5t to fly at high speed for the Regional turboprop aircraft. That is way Clark-Y airfoil which is used to conventional turboprop aircraft propeller is selected as a blade airfoil. Adkins method is used for aerodynamic design and performance analysis with respect to the propeller design point. Adkins method is based on the vortex-blade element theory which design the propeller to satisfy the condition for minimum energy loss. propeller geometry is generated by varying chord length and pitch angle at design point of Regional turboprop aircraft. The propeller design results indicate that is evaluated to be properly constructed, through analysis of propeller aerodynamic characteristics using the Meshless method and MRF, SM method.

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The Design and Analysis of Composite Advanced Propeller Blade for Next Generation Turboprop Aircraft (차세대 터보프롭 항공기용 복합재 최신 프로펠러 설계 및 해석)

  • Choi, Won;Kim, Kwang-Hae;Lee, Won-Joong
    • The KSFM Journal of Fluid Machinery
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    • v.15 no.6
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    • pp.11-17
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    • 2012
  • The one way fluid structure interaction analysis on advanced propeller blade for next generation turboprop aircraft. HS1 airfoil series are selected as a advanced propeller blade airfoil. Adkins method is used for aerodynamic design and performance analysis with respect to the design point. Adkins method is based on the vortex-blade element theory which design the propeller to satisfy the condition for minimum energy loss. propeller geometry is generated by varying chord length and pitch angle at design point. Blade sweep is designed based on the design mach number and target propulsion efficiency. The aerodynamic characteristics of the designed Advanced propeller were verified by CFD(Computational Fluid Dynamic) and showed the enhanced performance than the conventional propeller. The skin-foam sandwich structural type is adopted for blade. The high stiffness, strength carbon/epoxy composite material is used for the skin and PMI(Polymethacrylimide) is used for the foam. Aerodynamic load is calculated by computational fluid dynamics. Linear static stress analysis is performed by finite element analysis code MSC.NASTRAN in order to investigate the structural safety. The result of structural analysis showed that the design has sufficient structural safety. It was concluded that structural safety assessment should incorporate the off-design points.

Steady-state and Transient Performance Simulation and Limit Control for Compressor Surge and Turbine Over-temperature of Turboprop Engine (PT6A-62) (터보프롭 엔진(PT6A-62)의 동.정적 성능모사와 압축기 서지 및 터빈 자온 제어연구)

  • 공창덕;기자영;강명철
    • Journal of the Korean Society of Propulsion Engineers
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    • v.6 no.2
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    • pp.53-63
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    • 2002
  • The steady-state and transient performance simulation program for a turboprop engine(PT6A-62) was developed. Specially this program included some algorithms, such as flat-rated behaviors in performance and limit control algorithms to prevent the compressor surge and the compressor-turbine inlet limit temperature overshoot. In order to minimize analysis errors, on interpolation method in component characteristics using matching errors and specific heat and specific heat ratio, which are functions of temperatures were used. The developed steady state performance analysis program can handle various conditions such as altitude, bleed extraction, inlet temperature and pressure and part throttle, and the transient performance analysis program incorporated a general mode for transient simulation and a control mode for prevention of the compressor surge and the turbine inlet limit temperature overshoot.

A Study on the Improvement of Real Estate Electronic Contract System by Introducing PropTech - Focusing on BlockChain Technology - (프롭테크 도입을 통한 부동산 전자계약시스템 개선에 관한 연구 - 블록체인 기술을 중심으로 -)

  • Lee, Sung-Min;Kim, Hee-Joon;Lee, Myeong-Hun;Kim, Jae-Jun
    • Journal of KIBIM
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    • v.11 no.3
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    • pp.12-21
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    • 2021
  • Existing real estate markets are monopolized because they are capital intensive and have information asymmetry. However, with the advent of the Fourth Industrial Revolution, technology is converging in various industries based on information technology (IT), and the real estate market is also developing a new field called "PropTech". According to this trend, new PropTech technologies are emerging in various real estate services sectors in Korea, but the electronic contract system, which accounts for the largest portion of the real estate industry, is still cited as a complex identification process and long processing time. Therefore, in this paper, we propose an improvement plan for the current electronic contract system through the introduction of blockchain technology, which is drawing attention with the development of PropTech, and explore the possibility of introduction by producing an experimental model of blockchain-applied electronic contract system in a programming language.

The Trend and forecast of Regional Aircraft market (세계 중형 항공기 시장 동향과 전망)

  • Chang, Tae-Jin
    • Current Industrial and Technological Trends in Aerospace
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    • v.7 no.1
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    • pp.11-19
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    • 2009
  • Though the regional airlines have grown consistently with world's economic recovery after 2001, now the future of them is uncertain from the current economic depression since 2007. In the regional aircraft industry, there have been two main trends that larger airplanes and regional jets inroad the market. But, the situational change including radical rise of oil price and worldwide recession induces the managerial damage of airlines and it makes them doubt about the regional jet which has been the main stream of regional aircraft after the success of the ERJ-145 in 1990s. Still, most of being developed or planed regional aircrafts choose turbo fan, the future demands of turboprop increase and it becomes a good alternative of future regional aircraft in many market forecasts. Thus in this paper, current situation and tendency of regional aircraft market are investigated with various market forecast reports.

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The Character Types and Analysis for 3D Animations : Based on Pixar's Animation (3D 애니메이션의 캐릭터 유형 및 성격 분석 : 픽사의 애니메이션을 중심으로)

  • Oh, Si-Ryong;Suk, Hae-Jung
    • Cartoon and Animation Studies
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    • s.9
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    • pp.161-183
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    • 2005
  • In the main current 3D animations which are put on the screens, the characters in the animations have a directly effect on the audiences by being closely connected with their descriptive constructions. In this research i am going to recognize the importance of characters and trace the points of sameness in the characters that appear in the 3D animations by analysing them. For this, 1 divided the characters that made lots of box-office profits all over the world and were made at Pixar which focused on characters and stories into 7 types according to written by Vladimir Propp and grasped the characters with MBTI system. 1 found out the points of sameness between the characters with this system. That will be able to be made use of referring the streams of stories and fixing the characters at the planning and producing stages. If we should make a study of figures, expressions, motions of the characters in connection with this research, it could help us to create the characters which are suitable for animations not only formative elements but also acting.

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