• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.267-276
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• 1993

A kinetmatic stirling engine with a domed heater was designed, fabricated and test. In designing and fabrication of the engine various problems were confronted and solved. Among various parts of the engine, cooler and main seal needed sophisticated techniques to fabricated in order to prevent leakage of working gas from the parts and to ensure their proper functions in the engine. The engine had a series of experiment at various working gas pressure, heater temperatures and engine speeds to evaluate its performance. Indicated and brake power outputs and indicated and brake thermal efficiencies were determined from the experimental data. The engine resulted a little inferior performance to that of the GPU-3 engine of which performance was well reported . Several recommendations were made to improve the performance of the engine during the evaluation of its performance.

• 한국추진공학회지
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• 제14권6호
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• pp.79-88
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• 2010

본 논문에서는 초음속 항공기용 저바이패스 터보팬엔진 성능 모델링에 관해 기술하였다. 대상 엔진은 Pratt and Whitney F100-PW-229 터보팬 엔진을 적용하였다. 일반적으로 엔진성능에 관한 상세한 상용정보는 알려져 있지 않다. F100-PW-229 터보팬 엔진성능 모델을 구축하기 위한 기초자료로 공개된 자료와 문헌 정보를 이용하였으며 구성품의 일반적 특성과 가정치에 대해 서술하였다. 엔진덱 데이터와 Gasturb11을 이용하여 구축된 엔진성능 모델의 해석 결과 비교를 통하여 엔진성능 모델이 적합하게 구성되었음을 보여주었다.

• 한국공작기계학회논문집
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• 제10권4호
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• pp.65-69
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• 2001

Research on the development of CNG dedicated engine that has important meaning both as a clean fuel and an alterna- tive energy to reduce the exhaust emission from diesel engine are actively going on these days. In this study, in order to present the direction and application of CNG engine, we tested the CNG engine performance experimented by changing the parameters such as ignition timing, equivalent ratio. The engine performance experimented by changing the parameters such as ignition timing, equivalent ratio. The engine performance and exhaust emission were measured by engine performance model at maximum load condition with increasing the rpm in the range of 1,000∼2,200rpm. Also, the testing engine was heavy-duty CNG dedicated engine with displacement of 11,050cc.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2012년도 제38회 춘계학술대회논문집
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• pp.578-585
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• 2012

왕복엔진은 효율, 가격 측면의 우수한 장점으로 소형 프로펠러 항공기에서 많이 사용되고 있다. 국내에서는 KC-100, LSA, PAV, UAV등의 개발에 왕복엔진이 주요하게 사용되고 있다. 본 연구에서는 소형항공기 개념설계에 사용할 수 있는 자연 흡기, 터보차저 엔진에 대한 성능 모델을 구축하였다. 왕복엔진 항공기 순항고도에서의 비행조건을 설계점으로 적용하여 프로펠러 성능해석을 통해 최적설계를 하였으며 적합한 프로펠러 성능모델을 구축하였다. 엔진 성능 모델과 프로펠러 성능 모델의 결합을 통하여 소형왕복엔진 항공기 성능해석을 위한 통합 추진 성능 모델을 구축하였다.

• Journal of Advanced Marine Engineering and Technology
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• 제30권6호
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• pp.662-668
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• 2006

The effects of fuel injection nozzle hole on the NOx emission and fuel oil consumption of medium speed diesel engine HYUNDAI HiMSEN 6H21/32 engine are investigated by engine performance simulation. The results of performance simulation are verified by experimental results of NOx omission fuel oil consumption, cylinder pressure, and heat release rate according to the variation of the number of fuel injection nozzle hole and engine load. The performance simulations are also carried out to optimize the fuel injection nozzle of 6H21/32 engine in respect to the NOx emission and fuel oil consumption. The engine performance measurements are performed to verify the results of performance simulation and to investigate the effects of fuel injection nozzle on engine performance. The results of measurement indicate that significant NOx reduction can be achieved with minimum deterioration in fuel oil consumption by optimizing the geometry of fuel injection nozzle on 6H21/32 engine.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2010년도 제34회 춘계학술대회논문집
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• pp.239-248
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• 2010

본 논문에서는 초음속 항공기용 저바이패스 터보팬엔진 성능 모델링에 관해 기술하였다. 대상 엔진은 Pratt and Whitney F100-PW-229 터보팬 엔진을 적용하였다. 일반적으로 엔진성능에 관한 상세한 상용정보는 알려져 있지 않다. F100-PW-229 터보팬 엔진성능 모델을 구축하기 위해 구성품의 일반적 특성에 대해 서술했으며 가정을 하였다. 엔진성능 해석을 위한 기초자료는 공개된 자료와 문헌정보를 이용하였다. Gasturb11을 이용한 엔진성능 해석 결과 엔진성능 모델이 적합하게 구성되었음을 보여주었다.

• 한국자동차공학회논문집
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• 제1권2호
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• pp.1-16
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• 1993

It is widely recognized that exhaust emissions, fuel economy and engine torque are affected by engine temperature, and logic would suggest that a cooling system offering a better compromise of engine temperature would improve both overall engine performance and economy. Author measured coolant temperature of some parts and flow rate which are necessary to heat transfer in a engine. And Author determined parameters necessary for the optimum design of a thermostat to keep the best engine performance ; determined the optimum operating temperature of electric cooling fan. A summary of this study is followed. 1. Study of the effects of cooling condition to combustion character in a engine. 2. Analyze of heat transfer surrounding engine cylinders. 3. Study of the effects of cooling character to engine heat rejection, determination of the optimum collant temperature for keeping the optimum engine performance and determination of the optimum design of a thermostat for keeping that temperature.

• 한국자동차공학회논문집
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• 제3권4호
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• pp.12-18
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• 1995

To improve the performance of diesel automobile engine, we designed new fuel supply system named ultrasonic fuel supply system. The performance test of diesel automobile engine carried out to examine possibility of practical use of ultrasonic fuel supply system to test engine. This paper deals with the comparative results of performance test of diesel automobile engine in terms of smoke, HC, SFC, PS, thermal, efficiency, torque. Following are obtained result. 1) In naturally aspirated diesel engine, when we use ultrasonic fuel supply system output, fuel consumptions are improved and exhaust gas reduced significantly. 2) In turbo-charging diesel engine both using of ultrasonic fuel supply system and using of conventional injector, engine performance and exhaust gas temperature are almost constant. 3) In turbo-charging diesel engine, when we use ultrasonic fuel supply system, NOx are emitted approximately 3.5% higher than total average. 4) In turbo-charging diesel engine, when we use ultrasonic fuel supply system, smoke and CO are 17% and 11.8% improved respectively.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 1998년도 유체기계 연구개발 발표회 논문집
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• pp.191-197
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• 1998

The recent results of the engine development performed in this you on Turbogreen 1200, the first industrial gas turbine engine developed in Korea, are presented. In order to improve the engine performance and structural stability from the first prototype engine, several variants of the engine and major components such as combustor and rotor assembly have been developed and tested. This paper shows these results especially focused on the engine test and performance analysis, in which test system, instrumentation and data processing are discussed as well. The engine performance and its trend give relatively good coincidence with the design ones. At design power of 1.2MW, the thermal efficiency of the engine is estimated over $25\%$ which is below the design target of $27.2\%$. This gap of efficiency is caused mainly by large tip clearance between turbine blades and casing. Considering high design efficiency superior to those of other competitive engines in this power class, Turbogreen 1200 would have a strong competition in its performance if the design efficiency is achieved by further developments such as tip clearance control, which are very possible and natural in final mass production of the developed gas turbine engine.

• 한국항공우주학회지
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• 제39권3호
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• pp.269-278
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• 2011

엔진 제작사의 엔진 시뮬레이션 상세한 정보는 일반적으로 공개되지 않으며 운용자는 엔진제어를 위해 단지 몇몇 파라미터만을 사용할 수 있다. 따라서, 엔진 성능모델을 생성하기 위해서는 제한된 가용 자료를 기초로 할 수 밖에 없다. 본 논문에서는 초음속 항공기용 저바이패스 터보팬엔진 성능 모델링에 관해 기술하였다. 대상 엔진은 Pratt and Whitney F100-PW-229 터보팬 엔진을 적용하였다. F100-PW-229 터보팬 엔진성능 모델을 구축하기 위하여 일반적인 공개된 자료와 문헌 정보를 기초로 하여 설계변수들에 대한 민감도 해석 및 Adaptive Random Search method를 이용한 파라미터 최적화 과정을 통하여 미지의 구성품 특성값들을 예측 적용하였다. 엔진덱 데이터와 구축된 엔진성능 모델의 해석 결과 비교를 통하여 엔진성능 모델이 적합하게 구성되었음을 확인하였다.