Open AccessTurbulence recognition in free convective flow by thermal-video post-processing in the case of a thermal power plant mill
Author(s) -
Suzana Linić,
Mihajlo S. Linić,
Bojana Radojković,
Slаvicа Ristić,
Bore Jegdić
Publication year - 2021
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci200907341l
Subject(s) - turbulence , convection , thermal , mechanics , mill , flow (mathematics) , software , convective heat transfer , thermal power station , airflow , thermal radiation , meteorology , mechanical engineering , materials science , computer science , physics , engineering , thermodynamics , programming language
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.