Implementation of one and three dimensional models for heat transfer coeffcient identification over the plate cooled by the circular water jets
| Autor: | B. Hadała, T. Telejko, A. Szajding, Zbigniew Malinowski, A. Cebo-Rudnicka |
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| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Computer simulation 020209 energy Plate heat exchanger Thermodynamics 02 engineering and technology Mechanics Heat transfer coefficient Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Heat flux Thermocouple 0103 physical sciences Heat transfer 0202 electrical engineering electronic engineering information engineering Boundary value problem Inconel |
| Zdroj: | Heat and Mass Transfer. 54:2195-2213 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-017-2195-0 |
| Popis: | A cooling rate affects the mechanical properties of steel which strongly depend on microstructure evolution processes. The heat transfer boundary condition for the numerical simulation of steel cooling by water jets can be determined from the local one dimensional or from the three dimensional inverse solutions in space and time. In the present study the inconel plate has been heated to about 900 °C and then cooled by six circular water jets. The plate temperature has been measured by 30 thermocouples. The heat transfer coefficient and the heat flux distributions at the plate surface have been determined in time and space. The one dimensional solutions have given a local error to the heat transfer coefficient of about 35%. The three dimensional inverse solution has allowed reducing the local error to about 20%. The uncertainty test has confirmed that a better approximation of the heat transfer coefficient distribution over the cooled surface can be obtained even for limited number of thermocouples. In such a case it was necessary to constrain the inverse solution with the interpolated temperature sensors. |
| Databáze: | OpenAIRE |
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