THERMAL SCIENCE

International Scientific Journal

Suzana Lj Linić

,

Mihajlo S. Linić

,

Bojana M. Radojković

,

Slavica S. Ristić

,

Bore V. Jegdić

TURBULENCE RECOGNITION IN FREE CONVECTIVE FLOW BY THERMAL-VIDEO POST-PROCESSING IN THE CASE OF A THERMAL POWER PLANT MILL

ABSTRACT
This paper presents a study of a free convection flow around the walls of a ventilation mill of the Thermal Power Plant “Kostolac B”, Kostolac, Serbia. A combined method consists of thermography and software post-processing, PATS. The PATS is specially developed for recognition of turbulence zones by the custom processing of large input data sets from thermal videos. The calculations determine maximum temperature fluctuation i.e. peak-to-peak fluctuation at every spot during the recording time. Three thermal videos of the walls were analyzed. Maximum temperature fluctuation occurred in the zones close to the obstacles, which are thus recognized as one of the main sources of turbulence. Besides, PATS has recognized fine camera oscillations and mechanical movements of a flexible material near the dozer wall. The detected zones of turbulence correspond to the previous studies and to the theory. The method shows good potential in the field of free convective flow research through the improvement of testing efficiency and cost savings. State-of-the-art thermograph cameras and updated software are recommended.
KEYWORDS
convection, turbulence, thermography, post-processing
PAPER SUBMITTED: 2020-09-07
PAPER REVISED: 2020-10-23
PAPER ACCEPTED: 2020-10-26
PUBLISHED ONLINE: 2020-12-05
DOI REFERENCE: https://doi.org/10.2298/TSCI200907341L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 4, PAGES [2447 - 2458]
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Turbulence recognition in free convective flow by thermal-video post-processing in the case of a thermal power plant mill

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence