航空发动机轴承腔油气两相流流动数值研究及验证

吕亚国; 张美华; 刘振侠; 胡剑平

doi:10.13224/j.cnki.jasp.2014.11.029

航空发动机轴承腔油气两相流流动数值研究及验证

doi: 10.13224/j.cnki.jasp.2014.11.029

西北工业大学动力与能源学院, 西安 710072

详细信息

作者简介:
吕亚国(1982-),男,陕西咸阳人,讲师,博士后,主要从事航空发动机滑油系统研究.

中图分类号: V233.4
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出版历程
- 收稿日期: 2013-12-06
- 刊出日期: 2014-11-28

Numerical study and validation for two-phase flow of oil and gas in aero-engine bearing cavity

School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 为检验传统的单向耦合模型是否适用于轴承腔油气两相流流场计算,建立了双向耦合模型.对比分析不同转速喷油后,两种模型腔内空气速度和湍动能的分布.并将双向耦合模型计算的数据与文献中实验数据对比.结果表明:喷油后空气速度分布总体变化规律与单相空气流动相似,但各点处空气速度均明显下降,平均空气速度在转速为8000r/min时变化最快;油滴的运动与蒸发对空气速度和湍动能影响较大,尤其是腔室主流区域空气速度由于油滴的耦合作用将会下降10%~15%,所以油滴对空气场的作用不能忽略.
- 航空发动机 /
- 轴承腔 /
- 双向耦合 /
- 空气速度 /
- 湍动能
Abstract: In order to test whether the traditional one-way coupling model was suitable for flowfield calculation of two-phase flow of oil and gas in bearing cavity, two-way coupling model was established. The distributions of air velocity and turbulence kinetic energy in two model cavity after injecting oil with different rotation speeds, were comparative investigated. The data calculated by two-way coupling model were compared with the experiment data in the reference. Some important conclusions were found: in the two-way coupling model, the change law of air velocity distribution after injecting oil is similar with the one-way air flow. However, air velocity reduces markedly at every point and the difference of average air velocity is the maximum in the case of the rotation speed of 8000r/min between these two models; the influence of droplet motion and evaporation on air velocity and turbulence kinetic energy is significant, especially the air velocity which will drop 10%-15% due to the coupling effect of the droplets in mainstream chamber, indicating influence of droplets on the air field cannot be ignored.
- aero-engine /
- bearing cavity /
- two-way coupling /
- air velocity /
- turbulence kinetic energy

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参考文献(18)

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