• 한국자동차공학회논문집
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• 제20권3호
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• pp.37-44
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• 2012

In this paper, the application of robust fuel gauge algorithm in the external environment to general fuel gauge system is proposed. The proposed fuel gauge system is composed of two modules which are Moving Average Filter (MAF) and Inclination Filter (IF). They are used to show correctly the amount of fuel in the external environment which are curve road, slope or acceleration/deceleration driving. In parallel, verification and validation processes using Software In the Loop Simulation (SILS) in personal computer and Hardware In the Loop Simulation (HILS) similar to actual vehicle environments are established. Through this research, it turned out to be possible to operation of gauge become correct of external environment.

• 대한기계학회논문집A
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• 제32권2호
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• pp.194-201
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• 2008

In the present study, fuel system matching was analyzed, and a characteristic chart for common use for design-related parts is presented. Based on the characteristic chart thus presented, controlled fuel system matching was tested for a 35-liter fuel system, and actual mass product movement coils were applied to validate the test. The keynote of the present research is the use of the characteristic chart to devise a preferred fuel system matching method. Through the present study, it will be possible to design standard parts for efficient fuel system matching in the near future.

• 한국전자파학회논문지
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• 제17권4호
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• pp.380-386
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• 2006

CPW(Co-Planer Waveguide) 전송선을 이용하여 자동차 연료 게이지 시스템인 전자식 연료 센더를 개발 제작하였다. 전송선 주위의 물질에 따라 전송선의 특성 임피던스가 변화되는 특성을 이용하였다. 자동차 연료통 속의 휘발유 혹은 경유의 높이에 따라 전송선의 특성 임피던스가 변화하면 반사량이 달라지므로 반사된 전압을 증폭함으로써 기존의 기계식 장치를 대체하는 시스템을 제작하였다. 브이(buoy)에 의한 부력과 연동된 저항 변화를 이용한 기존의 floating 방식이 갖는 기계식 작동 고장을 없애고, 유량 높이 오차를 줄이도록 하였다. 두께 1.6 mm의 Epoxy 기판에 CPW 전송 선로 및 제반 전자 장치를 구성하여 실측한 결과 기존 시스템에 비해 높이 오차가 적고 선형성이 우수한 특성을 보였다. 이 시스템은 PCB상 SMT로 제작되어 저가이면서도 양산성이 좋고 수명이 반영구적이어서 기존 시스템과의 경쟁력에서 우위를 보일 것으로 예상된다.

• 센서학회지
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• 제17권4호
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• pp.308-316
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• 2008

For the measurement of liquid level in ship's cargo tank, ballast tank, fuel oil tank and fresh water tank, several types of gauge meter are used such as tubular type, magnetic float type, reflex type transparent type and welding pad type. Among them, magnetic float type gauge meter is environmental friendly device because it is free of power source and maintenance. The main obstacle of the device is relatively large error bound. In this paper, finite element method is used to design and analysis of the magnetic float type gauge meter. The operation of reed switch according to the magnetic field has been successfully described and agreed well with experimental measurement. The optimum geometry with combination of permanent magnet and reed switches are designed to achieve 98 % accuracy of fluid level.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2004년도 추계 학술발표회 논문집
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• pp.245-250
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• 2004

• Journal of Mechanical Science and Technology
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• 제16권9호
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• pp.1156-1165
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• 2002

The characteristics of combustion and radiation heat transfer of an oxygen-enhanced diffusion flame was experimentally analyzed. An infrared radiation heat flux gauge was used to measure the thermal radiation of various types of flames with fuel, air and pure oxygen. And the Laser Induced Incandescence (LII) technique was applied to characterize the soot concentrations which mainly contribute to the continuum radiation from flame. The results show that an oxygen-enhanced inverse diffusion flame is very effective in increasing the thermal radiation compared to normal oxygen diffusion flame. This seems to be caused by overlapped heat release rate of double flame sheets formed in inverse flame and generation of higher intermediate soot in fuel rich zone of oxygen-fuel interface, which is desirable to increase continuum radiation. And the oxygen/methane reaction at slight fuel rich condition (ø=2) in oxygen-enhanced inverse flame was found to be more effective to generate the soot with moderate oxygen availability.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2000년도 춘계학술대회논문집
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• pp.171-178
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• 2000

In order to evaluate the tensile behaviors of hoop direction for the nuclear fuel cladding tubes the shapes of specimen and jig fixtures for the ring test are decided with various conditions under the elastic-large plastic deformations. The axial displacement of the jig cylinders is converted to the circumferential direction elongations of specimen. The stress distributions on specimen are depended on the radii and locations of specimen and jig size and central angle. Therefore we calculated the stress distributions and decided the optimum shapes to get the uniform stress in the area of specimen gage length. Form the analysis the stress distributions in gate area are reviewed with the radii and location of specimen notch and the central angle of jig cylinder,. The optimum shapes of specimen and jig are proposed to the clad tube having 10.62 mm in diameter and 0.63mm in thickness for 16x16 PWR nuclear fuel assembly.

• 한국추진공학회지
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• 제25권2호
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• pp.34-41
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• 2021

상업용 HVOF 토치 (원래 코팅 용도로 설계됨)가 재료 테스트를 위한 고온 유동원으로 수정되었다. 이 연구에서는 수냉식 상용 Gardon 게이지를 사용하여 노즐 출구에서 떨어진 네 위치에서 열유속을 측정하였다. 냉각수 온도 데이터는 동일한 위치에서 열량 측정 열유속 (calorimetric heat flux)을 계산하는 데 사용되었다. 두 방법의 열유속을 비교 한 결과 열량 측정 열유속이 Gardon 게이지 열유속보다 몇 배 더 높은 것으로 나타났다. 두 가지 방법 사이에 나타나는 불일치를 이해하기 위해 열량 측정방법에 대한 가설을 적용하였다. 이것은 가설에 대한 상당한 검증으로 간주될 수 있지만 적절한 수치모델을 사용하여 추가 개선이 필요하다.

• Advances in aircraft and spacecraft science
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• 제1권3호
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• pp.311-330
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• 2014

Environmental impact of aircraft emissions can be addressed in two ways. Air quality impact occurs during landings and takeoffs while in-flight impact during climbs and cruises influences climate change, ozone and UV-radiation. The aim of this paper is to investigate airports related local emissions and fuel consumption (FC). It gives flight path optimization model linked to a dispersion model as well as numerical methods. Operational factors are considered and the cost function integrates objectives taking into account FC and induced pollutant concentrations. We have compared pollutants emitted and their reduction during LTO cycles, optimized flight path and with analysis by Dopelheuer. Pollutants appearing from incomplete and complete combustion processes have been discussed. Because of calculation difficulties, no assessment has been made for the soot, $H_2O$ and $PM_{2.5}$. In addition, because of the low reliability of models quantifying pollutant emissions of the APU, an empirical evaluation has been done. This is based on Benson's fuel flow method. A new model, giving FC and predicting the in-flight emissions, has been developed. It fits with the Boeing FC model. We confirm that FC can be reduced by 3% for takeoffs and 27% for landings. This contributes to analyze the intelligent fuel gauge computing the in-flight fuel flow. Further research is needed to define the role of $NO_x$ which is emitted during the combustion process derived from the ambient air, not the fuel. Models are needed for analyzing the effects of fleet composition and engine combinations on emission factors and fuel flow assessment.

• 대한기계학회논문집A
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• 제29권4호
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• pp.600-605
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• 2005

In this study, the ring tensile test at high temperature was suggested to evaluate the hoop tensile properties of small tube such as the cladding in the nuclear reactor Using the Arsene's ring model, the ring tensile test was performed and the test data were calibrated. From the result of the ring test with strain gauge and the numerical analysis with 1/8 model, LCRR(load-displacement conversion relationship of ring specimen) was determined. We could obtain the hoop tensile properties by means of applying the LCRR to the calibrated data of the ring tensile test. A few difference was observed in view of the shape of fractured surface and the fracture mechanism between at the high temperature and at the room temperature.