http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 하종백(Jonpaek Ha) (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
CFD analysis를 이용한 Fuel filling pipe-line 설계
이규익(Kyuik Lee),송봉하(Bongha Song),하종백(Jonpaek Ha) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
When filling the gas tank, the gas dispenser is shut off long before the tank is filled. It’s called PSO(Premature Shut-Off). Generally, this problem occurs when the filler pipe from the nozzle to the gas tank fills up with fuel and operates a sensor located on the pump nozzle. A sharp bend in the pipe causes the fuel rushing into the inlet to accumulate at the top of the pipe rather than move directly into the gas tank. When the fuel swirls around in the pipe, it creates a blockage, causing fluid to back up in the filler pipe. The nozzle of the fuel pump has a sensor that turns the pump off as soon as it is surrounded by liquid. This simulations are for the fuel to travel from the fuel inlet to the gas tank while avoiding obstacles along the way. This paper is mainly purposed to avoid this phenomenon through the optimized pipe design by using CFD analysis. As a result, the simulations indicate that CFD can be successfully utilized as a tool to shorten the design, development and cost reduction cycle of a nozzle, filler pipe, canister, and tank system.
-
연비향상을 위해 최적화된 opening을 이용한 aerodynamic front end styling
이규익(Kyuik Lee),송봉하(Bongha Song),하종백(Jonpaek Ha),이태원(Taewon Lee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
As the environmental disruption caused by the vehicle is emerged, new vehicles with high fuel efficiency are needed. To improve fuel efficiency, vehicles have certainly the low aerodynamic drag coefficient. This paper is mainly purposed to reduce aerodynamic drag coefficient using the optimized opening for fuel efficiency front end styling by using CFD analysis. There are two ways to reduce aerodynamic drag coefficient in this paper. First one is to lower air leakage from front opening to CRFM module. Second one is to have the optimized opening. As a result, this paper showed that aerodynamic drag coefficient was reduced by lowering leakage and front opening. Also engine cooling performance was increased with aero-friendly styling.
-
Engine cooling airflow의 공기 저항에 관한 수치적 연구
송봉하(Bongha Song),이규익(Kyuik Lee),하종백(Jonpaek Ha) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
These days, the fuel economy of road vehicles is getting important all over the world due to the several reasons such as the depletion of fossil fuel, high fuel cost, and stringent regulation of toxic exhaust gas from conventional internal engine combustion. Therefore, all auto makers are requested to develop a vehicle with high fuel efficiency as a demand of times. In this view point, aerodynamics can contribute considerably to solve these demands from customers. Total drag of road vehicle is mainly composed of three parts, exterior skin effect from upper body, underbody effect, and cooling drag. Especially, drag increment from engine cooling airflow need to be minimized for better aerodynamic and powertrain cooling performances through the optimization of front-end styling. Aerodynamics friendly front-end styling is completed by the grille inlet opening and CRFM sealing which are represented by baffle and gap seal. In this research, the drag impact on cooling airflow is studied using CFD analysis. The analysis results showed that grille inlet opening can be closed by reducing the cooling air leakage from grille inlet airflow to heat exchanger. Finally, the closing of non-effective opening are through the optimization of CRFM sealing using baffle and gap seal gave us dramatic aerodynamic saving effect, and therefore it helps the fuel economy.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
