Wall Heat Transfer Measurement Using Thermopile Sensors in Transitional Impinging Jet Flow

0571007 - ÚT 2024 ES eng C - Konferenční příspěvek (zahraniční konf.)
Antošová, Zuzana - Trávníček, Zdeněk
Wall Heat Transfer Measurement Using Thermopile Sensors in Transitional Impinging Jet Flow.
Sensors and Electronic Instrumentation Advances - SEIA´2022 Conference Proceedings. Spain: IFSA Publishing, S.L., 2022 - (Yurish, S.), str. 189-192, s. 189-192. ISBN 978-84-09-43854-9.
[International Conference on Sensors Engineering and Electronics Instrumentation Advances (SEIA'2022) /8./. Corfu (GR), 21.09.2022-23.09.2022]
Grant CEP: GA ČR(CZ) GC21-26232J
Institucionální podpora: RVO:61388998
Klíčová slova: heat transfer * pipe flow * impinging jet
Obor OECD: Thermodynamics

Study addresses heat transfer measurement - local Nusselt number evaluation in case of round impinging jet issuing from long straight pipe nozzle. Key problem consists in heat flux measurement using thermopile sensor. Low Reynolds numbers (Re = 2250–3010) are focused. Heat transfer is highly influenced by intermittency and transition - non-monotonic relationship between Nusselt and Reynolds numbers occurs. Although experiments are well repeatable, comparison with reference experimental data indicates surprisingly large discrepancy. Main reason is sensitivity of laminar-turbulent transition to disturbances. On the other hand, results in laminar and fully turbulent regimes are in reasonable agreement with literature.
Trvalý link: https://hdl.handle.net/11104/0342422