Two-Phase Flow Correlations in Air/Oil Systems of Aero Engines

Author:

Zimmermann H.1,Kammerer A.1,Fischer R.1,Rebhan D.1

Affiliation:

1. MTU Motoren- und Turbinen-Union München GmbH, Federal Republic of Germany

Abstract

A strategy is outlined on how to introduce two-phase flow correlations into air/oil system calculations for aero engines. The importance of two-phase flow effects is highlighted by demonstrating their particular significance for the high altitude performance of a vent system. For air/oil mixtures very little can be obtained from the literature and correlations derived from air/water test results have to be corrected. For critical flow conditions in restrictors an improved method is developed. Some test data obtained for air/oil mixtures show, that the proposed correlations agree fairly well. Furthermore, it is shown how numerical methods for this complex field of fluid dynamics can be used in the future by the example of phase demixing by centrifugal forces.

Publisher

American Society of Mechanical Engineers

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Experimental Analysis of Air∕Oil Separator Performance;Journal of Engineering for Gas Turbines and Power;2008-08-28

2. Comparison of Computational Fluid Dynamics and Particle Image Velocimetry Data for the Airflow in an Aeroengine Bearing Chamber;Journal of Engineering for Gas Turbines and Power;2004-03-01

3. Disintegration of Oil Films Emerging From Radial Holes in a Rotating Cylinder;Journal of Engineering for Gas Turbines and Power;2003-10-01

4. Droplet Generation by Disintegration of Oil Films at the Rim of a Rotating Disk;Journal of Engineering for Gas Turbines and Power;2000-02-01

5. Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry;Journal of Engineering for Gas Turbines and Power;2000-01-03

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