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자료유형
학술저널
저자정보
저널정보
한국자동차공학회 International journal of automotive technology International journal of automotive technology Vol.2 No.4
발행연도
2001.12
수록면
165 - 170 (6page)

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초록· 키워드

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This study is focussed on the investigation of spray characteristics from the high pressure gasoline injector for the application of gasoline direct injection engine. For the analysis of spray structure of high pressure gasoline injector; the laser scattering method with a Nd-Yag laser and the Phase Doppler particle analyzer system were applied to observe the spray development and the measurement of the droplet size and velocity of the spray, respectively. Also spatial velocity distribution of the spray droplet was measured by use of the particle image velocity system. Experimental results show that high pressure gasoline injector shapes the hollow-cone spray, and produce the upward ring shaped vortex on the spray surface region. This upward ring shaped vortex promotes the secondary atomization of fuel droplets and contributes to a uniform distribution of fuel droplets. Most of fuel droplets are distributed under 31 ㎛ of the mean droplet size (SMD) and the frequency distribution of the droplet size under 25 11m is over 95% at 7 MPa of injection pressure. According to the experimental results of PIV system, the flow patterns of the droplets velocity distribution in spray region are in good agreement with the spray macroscopic behaviors obtained from the visualization investigation.

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ABSTRACT

1.INTRODUCTION

2.EXPERIMENTAL APPARATUS AND PRO-CEDURES

3.RESULTS AND DISCUSSIONS

4.CONCLUSION

ACKNOWLEDGMENTS

REFERENCES

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