Numerical study on the ejector structure of deaerator

Qiang Tian; Zhen Xia Liu; Jian Ping Hu

doi:10.1109/ICMAE.2019.8881045

Numerical study on the ejector structure of deaerator

Qiang Tian, Zhen Xia Liu, Jian Ping Hu

School of Power and Energy

Northwestern Polytechnical University Xian

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Aeroengine oil systems typically have a deaerator to reduce the amount of air in the oil. Modern aircraft may not be able to draw oil when flying under multi-attitude conditions, so consider designing a deaerator with an ejector structure to ensure that the aircraft continues to supply oil during multiple conditions. A deaerator with an ejector structure was designed to analyze the feasibility of the ejector function based on the Bernoulli principle. The CFD method was used to simulate the two-phase flow of the oil and air mixture in the ejector structure of the deaerator. Firstly, it was analyzed whether the structure can achieve the ejector function. In addition, the influence of oil-gas ratio on the ejector mass flow rate and the ejection coefficient was studied. Finally, this paper studied the influence of the area ratio at the diffusion section on the ejector effect. It can draw the following conclusions from this research:1. The pressure drop at the ejector nozzle can overcome the influence of the oil's gravity and achieve the ejector function. 2. The oil-gas ratio has a greater influence on the ejector effect under different working conditions.3. The structure of the ejector with an area ratio of 1.5 is superior to the others in the ejector effect.

Original language	English
Title of host publication	2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	475-481
Number of pages	7
ISBN (Electronic)	9781728155357
DOIs	https://doi.org/10.1109/ICMAE.2019.8881045
State	Published - Jul 2019
Event	10th IEEE International Conference on Mechanical and Aerospace Engineering, ICMAE 2019 - Brussels, Belgium Duration: 22 Jul 2019 → 25 Jul 2019

Publication series

Name	2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019

Conference

Conference	10th IEEE International Conference on Mechanical and Aerospace Engineering, ICMAE 2019
Country/Territory	Belgium
City	Brussels
Period	22/07/19 → 25/07/19

Keywords

Area ratio
Deaerator
Ejection coefficient
Ejector structure
Oil-gas ratio
Two-phase flow

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10.1109/ICMAE.2019.8881045

Cite this

Tian, Q., Liu, Z. X., & Hu, J. P. (2019). Numerical study on the ejector structure of deaerator. In 2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019 (pp. 475-481). Article 8881045 (2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICMAE.2019.8881045

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title = "Numerical study on the ejector structure of deaerator",

abstract = "Aeroengine oil systems typically have a deaerator to reduce the amount of air in the oil. Modern aircraft may not be able to draw oil when flying under multi-attitude conditions, so consider designing a deaerator with an ejector structure to ensure that the aircraft continues to supply oil during multiple conditions. A deaerator with an ejector structure was designed to analyze the feasibility of the ejector function based on the Bernoulli principle. The CFD method was used to simulate the two-phase flow of the oil and air mixture in the ejector structure of the deaerator. Firstly, it was analyzed whether the structure can achieve the ejector function. In addition, the influence of oil-gas ratio on the ejector mass flow rate and the ejection coefficient was studied. Finally, this paper studied the influence of the area ratio at the diffusion section on the ejector effect. It can draw the following conclusions from this research:1. The pressure drop at the ejector nozzle can overcome the influence of the oil's gravity and achieve the ejector function. 2. The oil-gas ratio has a greater influence on the ejector effect under different working conditions.3. The structure of the ejector with an area ratio of 1.5 is superior to the others in the ejector effect.",

keywords = "Area ratio, Deaerator, Ejection coefficient, Ejector structure, Oil-gas ratio, Two-phase flow",

author = "Qiang Tian and Liu, {Zhen Xia} and Hu, {Jian Ping}",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 10th IEEE International Conference on Mechanical and Aerospace Engineering, ICMAE 2019 ; Conference date: 22-07-2019 Through 25-07-2019",

year = "2019",

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series = "2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019",

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Tian, Q, Liu, ZX & Hu, JP 2019, Numerical study on the ejector structure of deaerator. in 2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019., 8881045, 2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019, Institute of Electrical and Electronics Engineers Inc., pp. 475-481, 10th IEEE International Conference on Mechanical and Aerospace Engineering, ICMAE 2019, Brussels, Belgium, 22/07/19. https://doi.org/10.1109/ICMAE.2019.8881045

Numerical study on the ejector structure of deaerator. / Tian, Qiang; Liu, Zhen Xia; Hu, Jian Ping.
2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 475-481 8881045 (2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - Aeroengine oil systems typically have a deaerator to reduce the amount of air in the oil. Modern aircraft may not be able to draw oil when flying under multi-attitude conditions, so consider designing a deaerator with an ejector structure to ensure that the aircraft continues to supply oil during multiple conditions. A deaerator with an ejector structure was designed to analyze the feasibility of the ejector function based on the Bernoulli principle. The CFD method was used to simulate the two-phase flow of the oil and air mixture in the ejector structure of the deaerator. Firstly, it was analyzed whether the structure can achieve the ejector function. In addition, the influence of oil-gas ratio on the ejector mass flow rate and the ejection coefficient was studied. Finally, this paper studied the influence of the area ratio at the diffusion section on the ejector effect. It can draw the following conclusions from this research:1. The pressure drop at the ejector nozzle can overcome the influence of the oil's gravity and achieve the ejector function. 2. The oil-gas ratio has a greater influence on the ejector effect under different working conditions.3. The structure of the ejector with an area ratio of 1.5 is superior to the others in the ejector effect.

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Tian Q, Liu ZX, Hu JP. Numerical study on the ejector structure of deaerator. In 2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 475-481. 8881045. (2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019). doi: 10.1109/ICMAE.2019.8881045

Numerical study on the ejector structure of deaerator

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Keywords

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