• Title, Summary, Keyword: 비행장

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Noise Analysis of Turbo Prop Aircraft(C90GT) (터보프롭 항공기(C90GT)의 소음 분석)

  • Ryu, Jong-Hyeon;Kim, Woo-Jin;Kim, Gyou-Beom
    • Journal of Convergence for Information Technology
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    • v.9 no.9
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    • pp.141-146
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    • 2019
  • The aircraft noise analysis area in this study is a training airfield where various kinds of aircraft are operated. It is difficult to identify the noise analysis as a real measurement in a training airfield. In order to overcome these practical limitations and to establish appropriate noise countermeasures, a noise map is prepared using the Integrated Noise Model Version 7.0 of the aircraft noise prediction program used by the FAA. The noise of C90GT aircraft was measured while flying the takeoff route, landing route, and long route. We want to identify areas where noise damage is more than 70 WECPNL. No area exceeding the legal standard of 70 WECPNL was found in all routes.

Flow Characteristics of Jet Vane Around Supersonic Flow Field (초음속 유동중의 제트베인 유동특성)

  • 박종호;신완순;신필권;박용철;김윤곤
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.34-34
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    • 1998
  • 차세대 비행체가 갖추어야 할 요건으로 다양한 작동 범위에서 다목적으로 사용될 수 있어야 한다는 점이다. 비행체는 작전시 초음속으로 순항해야 하며, 폭탄으로 손상된 비행장에서도 이륙하여 작동할 수 있도록 짧은 이륙과 착륙 거리를 가져야 하기 때문에 현재 비행체보다 더 큰 받음각에서 작동하여 비행시 뛰어난 기동성을 가져야 한다. 제어력을 향상시키기 위해서 받음각과 동압에 의존하지 않고 큰 제어 모멘트를 제공하는 차세대 방법은 엔진의 배기가스를 원하는 비행 방향으로 제어하는 것으로 이러한 방법을 추력 편향 제어(Thrust Vector Control)라고 한다. 기존 공력에 의한 비행 자세제어 방법은 속도의 2승에 비례하는 제어력을 발생하지만, 실속을 피해야하기 때문에 공기력을 이용한 날개 및 비행체의 받음각에 한계가 있어 비행체의 선회능력을 제한하며 고공에서 저속비행 하는 경우에는 공기의 밀도가 낮고 동압이 작게 작용하여 선회능력은 낮아진다. 그러나, 추력 편향 장치는 공력을 이용하지 않고 추력을 이용하기 때문에 실속에 의한 제한이 없어 큰 받음각(70$^{\circ}$-90$^{\circ}$)으로 선회할 수 있어 월등한 기동성을 발휘할 수 있다. 이러한 추력 편향 장치 중 제트 베인형은 소형화가 가능하고, 하나의 노즐로 수직, 수형 및 횡 방향의 3축 제어를 할 수 있어 많이 사용되고 있다.

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A Study on the Improvement for Availability of the Small Airport Facilities in Korea (한국 소형(小型) 비행장(飛行場) 시설(施設)의 활용성(活用性) 증대(增大)에 관한 연구(硏究))

  • Lee, Kang-Suk;Kang, Hon
    • The Korean Journal of Air & Space Law and Policy
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    • v.14
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    • pp.331-379
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    • 2001
  • The purpose of this study is provide better suggestions to utilize the small aircraft by examining current situations of those airports. Then, the results of this study should help explain about the Availability of the airports for small aircraft in view of airplane exhibition, air-sports activity fields for aviation sports population, aviation theme park, and aviation-related education facility. This study examines current situations of the small airports for small aircraft which have been limited in their utility and compares the airports at the same level abroad. By examining these airports, this paper can make suggestions for the Availability of the small airports. Significance of the study lies in providing businessmen planning to invest the small airports and owners of airports with profitable consequences. At the macro level, it is expected to have a more effective development of land and an increase of aviation market value.

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A Study Shear Behavior of Reinforced Concrete Beams Mixed Steel Fiber (강섬유(鋼纖維)를 혼입(混入)한 철근(鐵筋)콘크리트 보의 전단학동(剪斷學動)에 관(關)한 연구(硏究))

  • Kwak, Kae Hwan;Lee, Kwang Myong
    • Journal of The Korean Society of Civil Engineers
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    • v.11 no.4
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    • pp.1-8
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    • 1991
  • Recently the use of steel fibers has been increased in flexural members and columns of concrete structures subjected to cyclic loadings; such as bridge decks, highway roads, runway of airport, buildings, etc.. However only a few experimental tests have been carried out under fatigue loading. In the present study, the reinforced concrete beams with 1% and 2% steel fiber volume fraction are investigated with and without stirrups. It has been found that in fatigue tests, the failure of the beam is usually due to breaking of fibers rather than fiber pull-out. A comparison of experiments and numerical analysis using the nonlinear F.E.M. program (ADINA) is also presented herein.

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A Case Study on Application of Obstacle Limitation Criteria for Specific Conditions of Airports (특정 조건의 비행장에서 장애물제한규정 적용 사례연구)

  • Kim, DoHyun;Kim, Woong Yi
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.24 no.2
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    • pp.25-30
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    • 2016
  • Obstacle defines all fixed and mobile objects, or parts thereof, that are located on an area intended for the surface movement of aircraft or extend above a defined surface intended to protect aircraft in flight or stand outside those defined surfaces and that have been assessed as being a hazard to air navigation. The airspace around airports are maintained free from obstacles so as to permit the intended aeroplane operations at the airports to be conducted safely and to prevent the airports from becoming unusable by the growth of obstacles around the airports. This is achieved by establishing a series of obstacle limitation surfaces or airspace imaginary surfaces that define the limits to which objects may project into the airspace. This is a case study that shows an application of obstacle limitation criteria, which must be maintained free from an critical obstacle, for specific conditions of two airports. For the purpose of the application, aeronautical studies/flight safety influence assessments were used to identify possible solutions and select a solution that is acceptable without degrading aviation safety.

The Effect on Safety Perception with Ultra Light UAV Pilot's Educational Environment Satisfaction : Including the DREEM Model (초경량 무인비행장치 조종자의 교육환경 만족도가 안전의식에 미치는 영향 : DREEM 모형을 포함하여)

  • Jung, Hyung-hoon;Kim, Kee-woong;Choi, Youn-chul
    • The Journal of Advanced Navigation Technology
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    • v.23 no.2
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    • pp.114-124
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    • 2019
  • The drone market, an unmanned aerial vehicle, is rapidly expanding and developing into an important area related to the huge changes in the traffic system of the future. With various technologies on the fourth industrial revolution, including drones, mentioned at the Davos Forum in January 2016, interest in drones is emerging as an explosive demand for national certificates. The number of drone pilots, which was only 400 in 2015, is continuing to surpass 17,000 as of 2018. Therefore, this study analyzed the safety perception of the pilots based on the DREEM (Dundee ready environmental assessment) model designed to evaluate the educational environment along with the current state of drone education in Korea. This led to the conclusion that the high level of satisfaction of the pilot with the educational environment contributes to the overall safety perception, including compliance with procedures.

Changes in Corrosion Rate of Gas Turbine Engines by the Korean Sea Area (우리나라 해역별 가스터빈엔진 부식률의 변화)

  • Oh, Kyungwon;Hur, Jangwan
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.137-138
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    • 2017
  • The sea of the Korean peninsula has various marine changes, including naval vessels, naval operational aircrafts, air force fighters, coastal airports and airfields. In particular salt directly affected by the marine environment, equipment operating in a high temperature / high speed as the gas turbine is the high temperature corrosion(Hot Corrosion) caused by sulfur components and salinity of the fuel used. When the height of the demister (air intake) is less than 7m, the salinity entering the sea increases and the corrosion increases rapidly. In addition, the weapon systems operating in the East Sea than the West Sea showed a 17% increase in corrosion rate due to the relatively high salinity scattered by saline, wind, and wave. In order to minimize the salinity inflow, it should be operated at more than 13m from the sea to minimize rapid hot corrosion.

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Corrosion of the Gas-Turbine Engine According to the Environment of the Korean Seas (우리나라 근해 해양환경에 따른 가스터빈엔진 부식에 대한 연구)

  • Oh, Kyungwon;Lim, Sehan
    • Journal of Aerospace System Engineering
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    • v.11 no.2
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    • pp.43-50
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    • 2017
  • The sea of the Korean peninsula has undergone various marine changes, including naval vessels, naval operational aircrafts, air force fighters, coastal airports and airfields. In particular, salt directly affected by the marine environment, equipment operating under a high temperature / high speed as the gas turbine is the high temperature corrosion (Hot Corrosion) caused by sulfur components and salinity of the fuel used. When the height of the demister (air intake) is less than 7 m, the salinity of the salt entering the sea increases and the corrosion increases rapidly. In addition, the weapon systems operating in the East Sea than in the West Sea showed a 17% increase in the corrosion rate due to the relatively high salinity scattered by saline, wind, and wave. In order to minimize the salinity inflow, it should be operated at more than 13 m from the sea to minimize rapid hot corrosion.

A Study on Operational Benefits of ADS-B through experimental Flight Test in Tae-An Airport (비행시험을 통한 ADS-B 운영상의 효과에 관한 연구)

  • Hong, Gyo-Young;Kim, Do-Hyun;Oh, Kyung-Ryoon
    • The Journal of Advanced Navigation Technology
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    • v.11 no.2
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    • pp.137-145
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    • 2007
  • The flight test of ADS-B is to demonstrate operational benefits to air traffic controllers and pilots when other aircraft data including the aiming altitude is displayed on CDTI. Additionally, This ADS-B study is to provide first operational experience of ADS-B in ATCS environment of South Korea and provide practical information to ATCS before deployment of ADS-B in South Korea is considered. Participation in the flight test has been limited to 2 Aircraft of H University which are installed ADS-B equipment and the ground station has installed in Tae-An airport. This test have been experimented according to the pre-arranged flight procedures of Tae-An airport. As a result of the test, it has shown that the number of radio transmitting and the time of radio occupied between controller and pilot are remarkably reduced. Besides, as both pilot and air traffic controller are able to see the traffic information in the vicinity of the aircraft, the test has demonstrated that it is possible for ADS-B not only to decline the controller's workload, but also to enhance pilot situational awareness in the near future.

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A study on introduction and operation plan of air traffic services operating certification system: Centered on small airfields (항공교통업무증명제도 도입과 운영 방안에 대한 연구: 소규모 비행장을 중심으로)

  • Lim, Jae-Hwan;Kim, Young-Rok;Choi, Yun-Chul
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.25 no.4
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    • pp.154-160
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    • 2017
  • In the former aviation law, only the Ministry of Land, Infrastructure and Transport has to provide air traffic services, In the case of providing aviation transportation service from civilian, such as aviation special education institution, private airfield installer, it was possible to carry out only by receiving a private contract from the government. But at the time of private consignment, the fact that the government has to bear the cost through the contract act. It is pointed out that it is a factor that hinders efficiency in the operation sector. Accordingly, in Article 85 of the Aviation Safety Act, which was enforced in March 2017, legal grounds were established to provide air traffic services excluding the Ministry of Land, Infrastructure and Transport. At the same time, we have introduced the air traffic services operating certification system, which enables the air traffic services to meet the requirements set by the Ministry of Land, Infrastructure and Transport in order to secure the safety of air traffic. In this study, we examine the major issues and problems of the small private control tower operated by the private institute in Korea. The effect of introduction of the air traffic services operating certification system which can introduce all the institutions which do not belong to the control agency in the former aviation law into the institutional system and the operation plan were examined.