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엔진 고공 시험에서 연료 유량 측정용 터빈 유량계의 측정 불확도 분석
양인영,Yang, In-Young 한국유체기계학회 2011 한국유체기계학회 논문집 Vol.20 No.1
Measurement uncertainty analysis of fuel flow using turbine flowmeter was performed for the case of altitude engine test. SAE ARP4990 was used as the fuel flow calculation procedure, as well as the mathematical model for the measurement uncertainty assessment. The assessment was performed using Sensitivity Coefficient Method. 11 parameters involved in the calculation of the flow rate were considered. For the given equipment setup, the measurement uncertainty of fuel flow was assessed in the range of 1.19~1.86 % for high flow rate case, and 1.47~3.31 % for low flow rate case. Fluctuation in frequency signal from the flowmeter had the largest influence on the fuel flow measurement uncertainty for most cases. Fuel temperature measurement had the largest for the case of low temperature and low flow rate. Calibration of K-factor and the interpolation of the calibration data also had large influence, especially for the case of very low temperature. Reference temperature, at which the reference viscosity of the sample fuel was measured, had relatively small contribution, but it became larger when the operating fuel temperature was far from reference temperature. Measurement of reference density had small contribution on the flow rate uncertainty. Fuel pressure and atmospheric pressure measurement had virtually no contribution on the flow rate uncertainty.
장인철(In Chull Jang),양인영(In Young Yang) 한국사회언어학회 2018 사회언어학 Vol.26 No.2
Jang, In Chull & Yang, In Young. 2018. “Linguistic Representations of Korean Immigrant English in North American Media Space: An Analysis of Appa s English in Kim s Convenience ”. The Sociolinguistic Journal of Korea 26(2), 1~36. With the increasing importance of the mass media in social life and the linguistic changes it incurs, sociolinguistic research on linguistic representations in cinematic discourse has been increasing recently. Situated within this growing body of emerging scholarship in sociolinguistics, this study examines how Korean immigrant English is represented in a Canadian TV sitcom, Kim’s Convenience . Drawing on the perspective that linguistic performances in fictional discourse serve as resources for sociolinguistic styling and characterization, this paper investigates how the linguistic representations of Korean immigrant English contribute to authenticating the character of a middle-aged male Korean immigrant called Appa in the TV series. For this purpose, Appa s English used throughout the TV series first season (13 episodes) was analyzed at the phonological, syntactic, lexical, thematic, and semiotic levels. The analysis revealed that each linguistic level shows distinct but concerted efforts regarding the authentication of Appa as a Korean immigrant. The phonological features of his English effectively share those of Korean English, whereas the syntactic representations are characteristic of a simple register. The lexical, thematic, and semiotic representations additionally reinforce Appa s “Koreanness” through the sitcom s integration of topics and images related to Korean culture.
양인영(In Young Yang),박준우(Jun Woo Park),이길성(Kil Sung Lee) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The most important purpose in designing vehicles is currently to focus on environment-friendly, economical, safety performance aspect. As for the environment-friendly and economical aspect, the issues are the overall movements toward lightweight vehicle production because of the fuel-efficiency improvement and heavier restriction on exhaust, however in contrast, the issues of the safety performance such as crush, comfort level and multi-functional programs lead to increase of vehicle weight. Therefore, the designing vehicles should be more interested in the aspect of securing safety performance, but at the same time, it also should consider reducing weight of structural member of vehicle. In this study, to lower the weight of side members, CFRP side members were manufactured by CFRP uni-direction prepreg sheet. The stacking condition related to the energy absorption of composite materials is being considered as an issue for the structural efficiency. Therefore, the axial collapse tests were conducted by changing the stacking condition such as fiber orientation angle and interlaminar number. In this paper the results of experimental works pertaining to the orientation angle and interlaminar number characteristics of CFRP(Carbon Fiber Reinforced Plastic) hat shaped section members that were subjected to static axial compressive loading are presented.
양인영(Inyoung Yang),이양지(Yang-ji Lee),김영문(Young-moon Kim),이경재(Kyung-jae Lee) 한국추진공학회 2012 한국추진공학회 학술대회논문집 Vol.2012 No.5
마하 5 스크램젯 엔진에 대하여 흡입구 시동 특성 시험을 수행하였다. 시험 모델과 시험 설비의 상호 작용이나 과다한 내부 압축비에 의한 흡입구 불시동 현상을 관찰하였다. 모델의 위치를 조정함으로써 모델-설비의 상호 작용을 없애고 카울의 형상을 변경하여 내부 압축비를 조정함으로써 흡입구 시동을 달성하였다. Intake start characteristics of a Mach 5 scramjet engine were investigated experimentally. Intake unstart was observed. The model-facility interaction or excessive internal contraction ratio were attributed to this unstart. Intake start was achieved by changing the model position to remove the model-facility interaction, and by modifying the cowl to give smaller contraction ratio.
양인영(in-young yang),양용준(yong-jun yang),김성봉(sung-bong kim),차천석(chon-suck cha) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
It is important to satisfy the requirements and standards for the protections of passengers in a car accident. There are lots of studies on the crushing energy absorption of a structure members in automobiles. In this paper, we have studied to investigate collapse characteristics and moisture absorption movements of CFRP structure members when CFRP(carbon fiber reinforced plastics) laminates are under the hygrothermal environment. In particular, the absorbed energy, mean collapse load and deformation mode were analyzed for side members which absorbed most of the collision energy. Also, variation of CFRP interlaminar numbers is important to increase the energy absorption capability. Therefore we have made a static collapse experiment to research into the difference of absorbed energy and deformation mode between moisture absorbed specimen and non-moisture absorbed.
양인영(In-Young Yang),최주호(Ju-Ho Choi),차천석(Cheon-Seok Cha) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
In this study, one type of circular shaped composite tube was used, combined with reinforcing foam. Furthermore, CFRP(Carbon Fiber Reinforced Plastic) circular member manufactured from CFRP prepreg sheet for lightweight design. The crashyworthy behavior of circular composite material tubes subjected to static axial compression under same condition is reported in this paper. Test was executed in order to compare the results to the energy absorption and collapse shape.