The 2D method for determining the temperatures field of the gas flow at the outlet of a multi-channel heat exchanger

All-Russian Conference with the School for Young Scientists “Thermophysics and Physical Hydrodynamics –2016”

Yu Slesareva, E.^1 ; Elistratov, S.L.^2 ; Ovchinnikov, V.V.^1

SB, RAS, Kutateladze Institute of Thermophysics, Novosibirsk

630090, Russia^1

Novosibirsk State Technical University, Novosibirsk

630092, Russia^2

关键词: Experimental determination;    Flow in channels;    Non-steady regime;    Steady-state gas flow;    Temperature changes;    Thermal imaging cameras;    Thermal structure;    Time resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/754/7/072004/pdf
DOI  :  10.1088/1742-6596/754/7/072004

来源: IOP

【 摘 要 】

The method for experimental determination of energy efficiency in the multichannel heat exchanger was tested. The visualization of a temperatures field has been performed to determine the thermal structure of gas flows with the use of fast-response fine- meshed wire. Thermograms of the temperature fields of the multi-channels assembly at the outlet were registered by thermal imaging camera. Results show that the 2D method provides a sufficient time resolution for the temperature field for the steady-state gas flow regime, heat generation, and nonsteady regime. The 2D method allows us to determine the gas stream parameters at the channel outlet in real time, which are necessary for determining the efficiency of the heat exchanger. Qualitative and quantitative characters of temperature changes in the thermograms are consistent with modern physical understanding of the gas flow in channels.