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차량의 프론트 END 패키지 특성을 고려한 인터쿨러 성능 향상 방안 및 새로운 인터쿨러 시스템 제안
박당희(Danghee Park),남혜동(Hyedong Nam) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
This study contains CFD analysis to understand an air flow characteristic influenced by a front end package. The using CFD is a novel approach for improving an intercooler’s cooling efficiency. Through this approach, we can optimize the design of the air-guide attached by an inter cooler. Also, we can get new system how to improve inter-cooler’s cooling efficiency. That is a hybrid inter-cooler system which has both water to air cooling and air to air cooling. In this system, Sub water to air cooling system means that charged air is cooled by an engine cooling water of radiator tank. In this process, Charged air’s temperature is below 100℃ and then pass the air to air cooling part for satisfying a standard ( Our condition is below 35 ℃). This paper shows how to improve a cooling efficiency of an air to air typed inter-cooler. Simultaneously, A new suggestion is to maximize an inter-cooler’s cooling efficiency.
사각 웨이브 형상을 갖는 판형 플라스틱 챠지에어쿨러의 방열성능 설계
이기수(Geesoo Lee),허형석(Hyungseok Heo),김현철(Hyunchul Kim),이승주(Seungjoo Lee) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study had dealt with the heat transfer characteristics of the automotive charge air cooler which had tubes of rectangular wave form. This study compared and investigated the characteristics as the number of tubes, the pitch and depth of the wave form of the tube on the basis of same core size. The proposed analysis was performed by applying the commercial fluid dynamics(CFD) code, Fluent 6.2, to the solution of 3-D turbulent flows of the plastic charge air cooler. It was found out that both heat transfer characteristics and charge air side pressure drop were linearly increased by severity factor for one step of plastic plate charge air cooler. In addition to, heat transfer performance of the plastic plate charge air cooler assembly with 36 steps of tubes was achieved by 6,850㎉/h at design point.
공랭식 인터쿨러 성능에 영향을 미치는 인자들에 대한 실험적 연구
오광헌(Kwang-hun Oh),정순안(Sun-an Jeong),전태수(Tae-soo Chun) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
To increase the power and torque of the vehicle engine, mount the turbocharger using the exhaust gas discharge pressure. In this system, the air cooled type charge air cooler(ACAC) is required to efficiently cool temperature rise in the process of compressing outside air. In this study, the performance factors of the air cooled type charge air cooler(ACAC) were analysed experimentally. And depending on the vehicle mounting position, SBS and Brick types were selected for the test. Our study analyzed the effects of factors affecting performance, such as offset rate and fin bonding ratio. The heat rejection and cooling air pressure drop by offset ratio and fin bonding ratio respectively did not affect up to 90%. However, the design should be considered as it affects the durability aspects of the fin bonding factor. In addition, heat rejection by offset ratio depends on the sample specification, but there is a possibility that 30-50% is appropriate.
김우석(Wooseok Kim),나천희(Chenhee Na),손유상(Yousang Son) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
This paper investigate the feasibility of developing commercial vehicle for a best fuel economy using a advanced aerodynamic design, an engine down-sizing technology and a vehicle total thermal management etc.; a aerodynamic design achieved by real wind tunnel, an engine down-sizing technology with the engine equipped with 2-stage turbo charger, WCAC(Water-cooled Charged Air Cooler) and 2-stage EGR(exhaust gas recirculation) cooler. It was possible to get over the power limit of the engine with VGT(variable geometry turbo charger) and EGR from 420PS to 460PS, using 2-stage turbo charger, WCAC and 2-stage EGR cooler. 9.1% improvement of a vehicle fuel economy could be accomplished using Aerodynamic design, Down-sizing of engine and Total thermal management. In the case of the variable engine oil pump and the Single Tire, it could be possible additionally to improve a vehicle fuel economy of 2.0%.