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1,000마력급 터보샤프트엔진 역류형 환형 연소기 성능시험평가 연구
김재호,이상윤,김형모,이동호,황동현,김주평,안철주,서중보 한국추진공학회 2024 한국추진공학회지 Vol.28 No.1
본 논문은 한국항공우주연구원과 한화에어로스페이스에서 수행하고 있는 1,000 마력급 터보샤프트엔진 개발과제에 활용될 역류형 환형 연소기 성능시험평가에 관한 내용이다. 연소기 개발과정은 노즐 버너시험, 섹터 연소기 성능시험, 환형 연소기 성능시험순으로 진행되었다. 연소기는 분무 성능이 뛰어난 공기 충돌 연료노즐과 유출냉각 방식이 적용된 라이너를 국내 최초로 사용하였다. 연소기 구성품의 성능시험 통해 엔진 개발 요구성능 목표 항목인 연소효율, 압력손실, Pattern Factor, Profile Factor의 성능 조건을 모두 만족함을 확인하였다. This paper presents research on the performance test evaluation of the reverse flow annular combustor used in the 1,000 shp(shaft horsepower)-class turboshaft engine development project conducted by the Korea Aerospace Research Institute and Hanwha Aerospace. The combustor development process was conducted in the order of fuel nozzle burner test, sector combustor performance test, and annular combustor performance test. An Air-blast fuel nozzle and a combustor liner with the Effusion Cooling method are used in gas turbine engines for the first time in Korea. Through the performance test of the combustor, the combustion test results demonstrated that all requirements for combustor performance, including maximum exit temperature, combustion efficiency, pattern factor, and profile factor, were met. The final shape of the combustor was derived.
김재호 한국보건사회연구원 2014 보건·복지 Issue&Focus Vol.243 No.-
50세 이상의 중 고령자들 중 생애 주된 일자리를 유지하는 집단은 자영/고용/무급가족종사자가 차지하는 비율이 가장 높게 나타나 계속근로를 하더라도 빈곤의 가능성이 완전은퇴보다 높게 나타남 생애 주된 일자리가 임시일용직인 경우 퇴직후 노동시장에 재진입했을 때도 여전히 임시일용직에 머물 가능성이 높아 이들의 근로여건이 개선되지 못할 경우 노후에도 상당한 경제적 어려움에 처할 가능성이 높음 생애 주된 일자리의 종사상지위에 따라 노인일자리사업의 정책적 대상을 명확히 구분할 필요가 있음을 시사함
金載昊 경북대학교 공과대학 1975 工大硏究誌 Vol.4 No.-
The dynamics of lateral piston motions across the cylinder clearance space of reciprocating engine are analyzed. A method for evaluating piston slap intensity is presented and its prediction is compared with the measured results. Some values of piston slap ietensity are indicated as a design aid.
김재호,김석삼 慶北大學校 1982 論文集 Vol.34 No.-
Optimum design of an impact damper of linear spring and viscous damping with Coulomb damping is presented. The problem posed is the optimization of the response of a mass from a shock imposed by a supporting base. The work deals with the minimization of the maximum acceleration of the isolated mass subject to a constraint on the relative displacement between the mass and the base. Results of the study are presented for a designer's reference on dimensionless curves showing the optimum stiffness and viscous damping coefficient as functions of Coulomb damping. Optimum design is treated using nonlinear programming methods to obtain accurate results.
관광캠페인의 인지도와 태도, 여행의도에 관한 연구: 2018년 여행주간을 대상으로
김재호 관광경영학회 2019 관광경영연구 Vol.93 No.-
The purpose of this study is to prove the impact relationship between the recognition, attitude and visit intention of 2018 Travel week. In addition, It analyzed the differences in the recognition, attitude and visit intention according to demographic characteristics. Through this measure, It aims to raise recognition of the travel week and reflect it in related policies to ultimately promote the revitalization of domestic tourism. The study was conducted for 10 days from Oct. 1 to 10, 2018 among citizens nationwide at five survey sites. The statistical analysis of the data was conducted using techniques of regression analysis and analysis of variance(ANOVA). As a result, it was analyzed that the recognition of travel week affects attitude and visit intention. In other words, increasing the recognition of the travel week results in an increase in attitude and visit intention. There were differences in three categories by age and some differences by gender and income. There was no difference by educational background. Based on the results of this analysis, I would like to suggest some suggestions for revitalizing domestic travel by raising recognition of travel week. First, the main slogan should be selected for a clear travel week. Second, the promotion should be diversified to expand public participation. Third, it is necessary to discover travel week goods that can be an issue. Finally, strategic promotional marketing should be done.