• Title/Summary/Keyword: Engine simulation

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Engine Performance Simulation to Evaluate the NOx Reduction of Charge Air Moisturizer System in a Medium Speed Diesel Engine (흡기가습 중형 디젤 엔진의 NOx 저감 평가를 위한 성능 해석 연구)

  • Kim, Ki-Doo;Park, Hyoung-Keun;Kim, Byung-Suck;Ha, Ji-Soo
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2005.11a
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    • pp.15-16
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    • 2005
  • In this study, the characteristics of NOx reduction by using charge air moisturizer system were evaluated by engine performance simulation in medium speed diesel engines. The results of performance simulation were verified by experimental results of single cylinder medium speed diesel engine equipped with charge air moisturizer system. Performance simulation was carried out to evaluate charge air moisturizer system of turbocharged diesel engine, HYUNDAI HiMSEN 9H25/33 engine. Those results show 50% NOx reduction at dew point $80^{\circ}C$ and charge air pressure 4bar.

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A New Methodology for Advanced Gas Turbine Engine Simulation

  • M.S. Chae;Y.C. Shon;Lee, B.S.;J.S. Eom;Lee, J.H.;Kim, Y.R.;Lee, H.J.
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2004.03a
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    • pp.369-375
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    • 2004
  • Gas turbine engine simulation in terms of transient, steady state performance and operational characteristics is complex work at the various engineering functions of aero engine manufacturers. Especially, efficiency of control system design and development in terms of cost, development period and technical relevance implies controlling diverse simulation and identification activities. The previous engine simulation has been accomplished within a limited analysis area such as fan, compressor, combustor, turbine, controller, etc. and this has resulted in improper engine performance and control characteristics because of limited interaction between analysis areas. In this paper, we propose a new simulation methodology for gas turbine engine performance analysis as well as its digital controller to solve difficulties as mentioned above. The novel method has particularities of (ⅰ) resulting in the integrated control simulation using almost every component/module analysis, (ⅱ) providing automated math model generation process of engine itself, various engine subsystems and control compensators/regulators, (ⅲ) presenting total sophisticated output results and easy understandable graphic display for a final user. We call this simulation system GT3GS (Gas Turbine 3D Graphic Simulator). GT3GS was built on both software and hardware technology for total simulation capable of high calculation flexibility as well as interface with real engine controller. All components in the simulator were implemented using COTS (Commercial Off the Shelf) modules. In addition, described here includes GT3GS main features and future works for better gas turbine engine simulation.

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A Case Study on the Verification of the Initial Layout of Engine Block Machining Line Using Simulation (엔진블럭 가공라인 초기설계안 검증을 위한 시뮬레이션 사례연구)

  • 문덕희;성재헌;조현일
    • Journal of the Korea Society for Simulation
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    • v.12 no.3
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    • pp.41-53
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    • 2003
  • The major components of an engine are engine block (or cylinder block), cylinder head, crank shaft, connecting rod and cam shaft. Thus the engine shop usually consists of six sub-lines, five machining lines and one assembly line. Flow line is the typical concept of layout for machining these parts, especially for engine block. In order to design an engine block machining line, several factors should be considered such as yearly production target, working hours, machines, tools, material handling equipments and so on. If the designers of manufacturing line were unaware of some factors those would be influenced on the system performance, it would make greater problems in the phase of mass production. Therefore the initial design of engine block machining line should be verified carefully. Simulation is the most powerful tool for analyzing the initial layout. This paper introduces the major factors those should be considered for designing the machining line and their effects on the system performance. 3D simulation models are developed with QUEST. Using the simulation model developed the initial layout is analyzed, and we suggest some ideas for improvement.

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LOW PRESSURE LOOP EGR SYSTEM ANALYSIS USING SIMULATION AND EXPERIMENTAL INVESTIGATION IN HEAVY-DUTY DIESEL ENGINE

  • Lee, S.J.;Lee, K.S.;Song, S.H.;Chun, K.M.
    • International Journal of Automotive Technology
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    • v.7 no.6
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    • pp.659-666
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    • 2006
  • EGR(Exhaust Gas Recirculation) systems are extensively used to reduce NOx emissions in light duty diesel engine but its application to heavy duty diesel engines is yet to be widely implemented. In this study, the simulation model for a EURO 3 engine was developed using WAVE and then its performance and emission levels were verified with experimental results. The possibility of operating a EURO 3 engine with LPL EGR system to satisfy the EURO 4 regulation was investigated. Each component of the engine was modeled using CATIA and WaveMesher. The engine test mode was ESC 13, and the injection timing and fuel quantity were changed to compensate for the reduction of engine power caused by applying EGR. As a result of the simulation, it was found that EURO 4 NOx regulation could be satisfied by applying an LPL EGR system to the current EURO 3 engine.

Multi-Stage Turbocharger Gasoline IC Engine Simulation for HALE UAV (고고도 장기체공 무인기 적용을 위한 다단 터보차저 가솔린 엔진 시스템 시뮬레이션)

  • Kang, Seungwoo;Bae, Choongsik;Lim, Byeungjun
    • Journal of the Korean Society of Propulsion Engineers
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    • v.23 no.1
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    • pp.101-107
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    • 2019
  • This study conducted a simulation to observe the performance of a multi-turbocharged gasoline internal combustion engine for a high-altitude long-endurance unmanned aerial vehicle (HALE UAV). The WAVE 1-D engine simulation software from Ricardo was used for the engine system modeling and simulation. The specifications of a 2.4-L four cylinder gasoline engine from commercial vehicles and maps of commercial vehicle turbochargers were applied to the multi-stage turbocharged engine system model. Three turbochargers and intercoolers were installed in series for the appropriate intake of pressure for the gasoline engine at a high altitude of 60,000 ft. There was one wastegate for the turbochargers. The operability of the engine system was analyzed via this simulation model.

Performance Simulation for the Variation of Fuel Injection Nozzle Configurations in Medium Speed Diesel Engine (중형 디젤 엔진의 연료분사노즐 형상에 따른 성능 해석 연구)

  • Kim, Ki-Doo;Youn, Wook-Hyun;Kim, Byong-Seok;Ha, Ji-Soo;Ahn, Kwang-Hean;Kim, Ju-Tae
    • Journal of Advanced Marine Engineering and Technology
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    • v.30 no.6
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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.

A Study on Performance Simulation of an Reciprocating Engine for Small Long Endurance Unmanned Aerial Vehicles (소형 장기체공 무인기용 왕복엔진 성능 예측 시뮬레이션 연구)

  • Chang Sung-Ho;Koo Sam-Ok;Shin Younggy
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.29 no.7 s.238
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    • pp.820-827
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    • 2005
  • Development of an engine with good fuel economy is very important for successful implementation of long endurance miniature UAVs (unmanned aerial vehicles). In the study, a 4-stroke glow-plug engine was modified to a gasoline-fueled spark-ignition engine. Engine tests measuring performance and friction losses were conducted to tune a simulation program for performance prediction. It has been found that excessive friction losses are caused by insufficient lubrication at high speeds. The simulation program predicts that engine power and fuel economy get worse with high altitude due to increasing portion of friction losses. The simulation results suggest quantitative guidelines for further development of a practical engine.

Development and Optimization of the Hybrid Engine System Model to Improve the Fuel Economy (연비향상을 위한 하이브리드 엔진 시스템 모델 개발과 최적화에 관한 연구)

  • Lee, Dong-Eun;Hwang, In-Goo;Jeon, Dae-Il;Park, Sim-Soo
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.6
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    • pp.65-73
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    • 2008
  • The purpose of this study is development of universal engine model for integrated Hybrid Electric Vehicle (HEV) simulator and a optimization of engine model. The engine model of this study is based on the MATLAB Simulink for universal and include engine fuel economy technologies for HEV. Various engine fuel economy technologies for HEV is estimated by commercial engine 1-D simulation program - WAVE. And, the 1-D simulation model of base version is compared with engine experiment result. The analyzed engine technologies with 1-D simulation are Dual-CVVT, Atkinson-Cycle and Cylinder-Deactivation System. There are improvement of fuel economy and power performance with Dual-CVVT model at part load and full load, pumping loss reduction with Cylinder-Deactivation System at idle and regeneration. Each estimated technologies are analyzed by 1-D simulation on all operation region for base data to converse simulink. The simulink based engine model maintains a signal with ECU for determination of engine operation point.

Test and Simulation of An Engine for Long Endurance Miniature UAVs (장기체공 소형 UAV용 엔진 성능시험 및 시뮬레이션)

  • Shin, Young-Gy;Chang, Sung-Ho;Koo, Sam-Ok
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.5
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    • pp.99-105
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    • 2005
  • Development of an engine with good fuel economy is very important for successful implementation of long endurance miniature UAVs (unmanned aerial vehicles). In the study, a 4-stroke glow-plug engine was modified to a gasoline-fueled spark-ignition engine. Engine tests measuring performance and friction losses were conducted to tune a simulation program for performance prediction. It has been found that excessive friction losses are caused by insufficient lubrication at high speeds. The simulation program predicts that engine power and fuel economy get worse with high altitude due to increasing portion of friction losses. The simulation results suggest quantitative guidelines for further development of a practical engine.

A Microcomputer-Based Data Acquisition/Control System for Engine Performance Test(II) -Construction and Evaluation of a Load Simulation System- (마이크로컴퓨터를 이용(利用)한 엔진 성능시험(性能試験)의 자동화(自動化)에 관한 연구(硏究)(II) -모의(模擬) 부하시험(負荷試験) 시스템의 구성(構成) 및 평가(評價)-)

  • Ryu, K.H.;Bae, Y.H.;Yoon, K.J.
    • Journal of Biosystems Engineering
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    • v.14 no.1
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    • pp.1-7
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    • 1989
  • This study was carried out to develop a system and methodology to simulate the engine load variation occuring during agricultural field operations for a laboratory engine test. The system consisted of an electric dynamometer, an Apple II microcomputer, and a data acquisition and control system. Several pieces of instruments were utilized to measure various engine performance data. Both engine torque and engine speed were fully controlled by a computer program. The dynamic characteristics of the system were analyzed through a series of tests and the limitations on the load simulation test were presented. The results of the study are summarized as follows: 1. Engine speed and toque were controlled by a computer program. The use of a stepping motor and reduction gears enabled engine speed be controlled within 1 rpm. 2. The natural frequency of the dynamometer-engine system was found to be around 5 Hz, at which the load simulation would be impossible because of resonance. 3. For the harmonic inputs with the frequencies above the natural frequency, the signal attenuated too much and therefore the load simulation was impossible. 4. The step response of the system showed an overshoot of 24.5 percent and the settling time for 5 percent criterion was around 3 seconds. 5. When actual field test data are utilized for load simulation, a low-pass filter should be included to attenuate the frequency components around and above the natural frequency.

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