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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology KSME International Journal Vol.16 No.8
발행연도
2002.8
수록면
1,135 - 1,143 (9page)

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초록· 키워드

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The intermittent spray characteristics of the single-hole diesel nozzle (dn=0.32 mm) used in the fuel injection system of heavy-duty diesel engines were experimentally investigated. The mean velocity and turbulent characteristics of the diesel spray injected intermittently into the still ambient were measured by using a 2-D PDPA (phase Doppler particle analyzer). The gradient of spray half-width linearly increased with time from the start of injection, and it approximated to 0.04 at the end of the injection. The axial mean velocity of the fuel spray measured along the radial direction was similar to that of the free air jet within R/b=l.0-1.5 regardless of elapsing time, and its non-dimensional distribution corresponds to the theoretical velocity distributions suggested by Hinze in the downstream of the spray flow fields. The turbulent intensity of the axial velocity components measured along the radial direction represented the 20-30 % of the ?_cl and tended to decrease in the outer region. The turbulent intensity in the trailing edge was higher than that in the leading edge.

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Abstract

1.Introduction

2.Experimental Setup and Conditions

3.Results and Discussion

4.Conclusions

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