City Research Online

Abstract

Positive displacement rotary machines are widely used in industry. Their efficiency is influenced by leakage through the clearance gaps between their stationary and rotating parts. Heat transfer rates between the gas and the machine parts change during the compression process, which can cause differential expansion between them and lead to deterioration of efficiency and reliability. It is necessary to understand the physics of that heat transfer in the leakage gaps.

Laser-induced fluorescence has a potential to provide visualization of the temperature field in micron size clearances. However, this technique has not been used before to measure temperatures of a gas in leakages during operation of such machines. The present study describes an assessment of the practical use of anisole-based planar laser-induced fluorescence for the study of the temperature field of leakage flows in the clearance gaps of a Roots blower. The results confirmed the feasibility of its use for this purpose.

Publication Type:	Article
Additional Information:	© 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0. This article has been published in Measurement by Elsevier.
Publisher Keywords:	Planar laser induced fluorescence, Positive displacement machines, Roots blower, Leakage flows, Temperature field, Clearance gap
Subjects:	Q Science > QA Mathematics T Technology > TJ Mechanical engineering and machinery
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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