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RISS 인기검색어
- 검색키워드
- 저자 : D. DANARDONO (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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DESIGN AND OPTIMIZATION OF AN LPG ROLLER VANE PUMP FOR SUPPRESSING CAVITATION
D. DANARDONO,김기성,E. ROZIBOYEV,C. U. KIM 한국자동차공학회 2010 International journal of automotive technology Vol.11 No.3
A roller vane type liquefied petroleum gas (LPG) pump was developed for a liquid phase LPG injection (LPLi) engine. Most of the LPG pumps used in the current LPLi engines are installed inside of the LPG tank, but this pump is intended to be installed outside of the LPG tank to overcome the difficulty of fixing an in-tank pump. Because LPG has a low boiling point and high vapor pressure, it usually causes cavitation in the pump and consequently deteriorates the flow rate of the pump. The purpose of this work is to optimize the design of the roller vane pump in order to suppress cavitation and increase the fuel flow rate by using a computational fluid dynamics (CFD) analysis. In order to achieve these goals, the intake port configuration and the rotor of the roller vane pump were redesigned and simulated using STAR-CD code. Computation was performed for six different models to obtain the optimized design of the roller vane pump at a constant speed of 2600 rpm and a constant pressure difference between the inlet and outlet of 5 bar. The computation results show that an increased intake port cross-section area can suppress cavitation, and the pump can achieve a higher flow rate when the rotor configuration is changed to increase its chamber volume. When the inlet pressure difference is 0.1 bar higher than the fluid saturation pressure,the pump reaches its maximum flow rate.
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CHARACTERIZATION AND OPTIMIZATION DESIGN OF VENTURI GAS MIXER FOR SYNGAS
K.S. Kim,D. Danardono,S.Y. Lee,J.H. Lee 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
A venturi mixer prototype was developed for mixing air and synthesis gas or syngas. Syngas has a very low energy density, so that a mixer which has air-fuel ratio around 1.2 is expected. The purpose of the work was to analyze the characteristics of the venturi gas mixer prototype by using a computational fluid dynamics (CFD) simulation and to make a new design that has desired performance. A three dimensional (3D) computational model of the venturi gas mixer prototype was made and used as the baseline model. 3D models with modifications on the size of venturi throat, gas chamber and gas exit channel were made and calculated in order to understand the characteristics of the venturi gas mixer. Base on the CFD results a new venturi gas mixer which had desired air-fuel ratio and acceptable pressure loss was designed and also a new prototype was made. The calculation and the experiment results of the optimized design showed that it had the expected airfuel ratio and pressure loss.
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