분공수와 분사각의 영향에 따른 거시적 디젤 분무 가시화|RISS 상세보기

다국어 초록 (Multilingual Abstract)

Macroscopic visualization of non-evaporating sprays was experimentally conducted to investigate spray tip penetration and spray angle under low-density conditions, corresponding to an early injection strategy. Furthermore, injectors with varying injection angles (146° and 70°) and numbers of holes (8 and 14) were employed to examine the impact of injector configuration. Compared to the baseline injector, 8H146, which has 8 holes and a 146° injection angle, the spray tip penetration of the 8H70 injector was found to be longer. This can be attributed to higher momentum due to a smooth flow field between the sac volume and the nozzle inlet, which is located closer to the injector tip centerline. The increase in velocity led to intense turbulence generation, resulting in a wider spray angle. Conversely, the spray tip penetration of the 14H70 injector was shorter than that of the 8H70 injector. The competition between increased velocity and decreased nozzle diameter influenced the spray tip penetration for the 14H70 injector; the increase in momentum, previously observed for the 8H70 injector, contributed to an increase in spray tip penetration, but a decrease in nozzle diameter could lead to a reduction in spray tip penetration. The spray angle for the 14H70 injector was similar to that of the 8H146 injector. Moreover, injection rate measurements revealed that the slope for a narrow injection angle (70°) was steeper than that for a wider injection angle during the injection event.

번역하기

참고문헌 (Reference)

1 Y. Iwabuchi, "Trial of new concept diesel combustion system - Premixed compression-Ignited combustion" 108 : 142-151, 1999

2 H. Hiroyasu, "Structures of Fuel Sprays in Diesel Engines" SAE 900475-, 1990

3 F. Payri, "Influence of nozzle geometry on spray characteristics in nonevaporative and evaporative conditions" 116 : 1483-1494, 2007

4 F. F. Zhao, "Homogeneous charge compression ignition (HCCI) Engines: Key Research and Development Issues, Chap. 2" Society of Automotive Engineers, Inc. 2003

5 T. V. Johnson, "Diesel Emission Control in Review -The Last 12 Months" SAE 2003

6 B. Walter, "Development of the High Power NADITM Concept using dual mode diesel combustion to achieve Zero NOx and Particulate Emissions" SAE 2002

7 H. Akagawa, "Approaches to solve problems of the premixed lean diesel combustion" 108 : 120-132, 1999

8 C. Arcoumanis, "Analysis of the Flow in the Nozzle of a Vertical Multi-Hole Diesel Engine Injector" 106 : 1245-1259, 1998

9 M. Blessing, "Analysis of Flow and Cavitation Phenomena in Diesel Injection Nozzles and Its Effects on Spray and Mixture Formation" 112 : 1694-1170, 2003

10 J. Dent, "A Basis for the Comparison of Various Experiment Methods for Studying Spray Penetration" SAE 710571-, 1971