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연료 온도변화가 압력식 선회노즐 유량계수 및 미립화 특성에 미치는 영향
송재호(Jaeho Song),유경원(Gyongwon Ryu),이지근(Jeekeun Lee) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
An experimental device was established for evaluating low-temperature spray properties to determine the effect of fuel temperature on the hydrodynamic properties and atomization properties of pressure swirl-type nozzles. The hydrodynamic characteristics were measured using a mass flow meter by varying injection pressure and temperature of fuel, and the atomization characteristics are measured using PIV system and PDA system. As the temperature decreased, the mass flow rate and discharge coefficients increased, and as the pressure increased, SMD and AMD decreased.
김명호(Myungho Kim),유경원(Gyongwon Ryu),민성기(Seongki Min),황기영(Kiyoung Hwang) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.11
혼합용 임펠러를 장착한 연료탱크의 액체연료와 미세 고체입자의 부유, 혼합 현상을 분석하고자 2차원 혼합 유동 수치해석을 수행하였다. 다상 유동해석은 Eulerian Grandular Multiphase 기법을 사용하였고, 해석기법을 12vol% 고체 혼합 조건 실험의 축방향 고체 농도 분포와 비교하여 확인하였다. 해석용 연료탱크는 10.5vol% 고체입자를 액체연료와 혼합하는 것으로 회전수 700rpm 조건에서 4가지 경우의 임펠러 위치와 유속 조건으로 해석을 수행하였다. 각 경우에 대한 Quality of Suspension 결과를 비교하여 적합한 임펠러 위치와 속도방향을 확인하였다. Two-dimemsional liquid-solid multiphase fluid dynamics was used to analyze the suspension and mix of liquid fuel and solid particles in fuel tank installed mixing impeller. In this paper, the multiphase flow was modeled using Eulerian Grandular Multiphase model. Experimental measurements of the axial distribution of solids concentration in stirred tanks under 12vol% solid loading were used for comparison with the CFD simulation. Four cases for the impeller location and flow pumping direction also were reviewed under 10.5% solids loading and 700rpm in fuel mix tank. The result of quality of suspension was compared with each cases and the impeller location and operation of mixing fuel tank was established.