Oil-Gas Two-Phase Flow Characteristics and Improvement of Bearing Chamber for an Aeroengine

被引：0
作者：
Ren G.-Z. [1 ]
Yan Y. [1 ]
Zheng G.-F. [1 ]
Zhao H. [1 ]
Sun D. [1 ]
Zhang C.-F. [1 ]
机构：
[1] School of Aero-Engine, Shenyang Aerospace University, Shenyang
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 11期
关键词：
Aeroengine; Bearing chamber; Oil-gas two-phase flow; Return-oil efficiency; Scavenge structure; Vent structure;
D O I：
10.13675/j.cnki.tjjs.2302011
中图分类号：
学科分类号：
摘要：
In order to study characteristics of oil-gas two-phase flow in bearing chamber of an aero-engine and improve return effect of oil，an unsteady two-phase flow solution model of the bearing chamber was established based on Euler-Euler method，and three improvement schemes were proposed for vent structure and scavenge structure of the bearing chamber. The oil-gas two-phase flow field characteristics and return-oil characteristics of a conventional bearing chamber and three improvement schemes under different working conditions were further analyzed. The results show that for the improved bearing chamber with embedded vent，oil was blocked by wall surface of the embedded vent，the oil flow from the vent decreased，and return-oil efficiency increased obviously. For the improved bearing chamber with slope on the return-oil structure，accumulation area of the oil on right side of return-oil port disappeared，volume fraction of the oil in the chamber decreased significantly，resulting in the increasing return-oil efficiency significantly. The combined improvement scheme（ES）can take into account the advantages of embedded and slope improvement schemes，and the return-oil efficiency is further improved. Compared with the conventional bearing chamber，when the oil flow rate is 200L/h and the rotating speed is 15000r/min，the return-oil efficiency of the embedded，slope and combined improvement schemes increases by 16.47%，13.02% and 32.81%，respectively. © 2023 Journal of Propulsion Technology. All rights reserved.
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