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Articles:2013,Vol:18,Issue(3):130-139 |
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Citation: |
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SUN Heng-chao, CHEN Guo-ding, YOU Hao, CHEN Jun-yu. Effect of Sealing Air on Oil Droplet and Oil Film Motions in Bearing Chamber[J]. International Journal of Plant Engineering and Management, 2013, 18(3): 130-139 |
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| Effect of Sealing Air on Oil Droplet and Oil Film Motions in Bearing Chamber |
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| SUN Heng-chao, CHEN Guo-ding, YOU Hao, CHEN Jun-yu |
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| School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072, P. R. China |
| Abstract: |
| Bearing chamber is one of important components that support aero-engine rotors and research on oil droplet and oil film motions is an important part of bearing chamber lubrication and heat transfer design. Considering the pressure of sealing air is an important operating condition that affects the oil droplet and oil film motions,the effect of sealing air pressure on airflow in bearing chamber is investigated in this paper firstly; and then based on the air velocity and air / wall shear force,the oil droplet moving in core air,deposition of oil droplet impact on wall as well as velocity and thickness of oil film are analyzed secondly; the effect of sealing air pressure on oil droplet velocity and trajectory,deposition mass and momentum,as well as oil film velocity and thickness is discussed. The work presented in this paper is conducive to expose the oil / air two phase lubrication mechanism and has certain reference value to guide design of secondary air / oil system. |
| Key words:
aero-engine
bearing chamber
sealing air
two phase flow
droplet
oil film
calculation
drag coefficient
film thickness
model
trajectory
velocity
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| Received: 2013-08-04
Revised:
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| DOI: |
| Funds: This paper is supported by the Natural Science Foundation of China under Grant No.51275411 |
| Corresponding author:
Email： |
| Author description:
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References: |
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