Szczegóły publikacji
Opis bibliograficzny
The influence of selected parameters of spray cooling and thermal conductivity on heat transfer coefficient / Agnieszka CEBO-RUDNICKA, Zbigniew MALINOWSKI, Andrzej BUCZEK // International Journal of Thermal Sciences ; ISSN 1290-0729. — 2016 — vol. 110, s. 52–64. — Bibliogr. s. 64, Abstr. — Publikacja dostępna online od: 2016-07-01
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 99233 |
|---|---|
| Data dodania do BaDAP | 2016-07-20 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.ijthermalsci.2016.06.031 |
| Rok publikacji | 2016 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | International Journal of Thermal Sciences |
Abstract
The influence of water spray pressure, water flux and the nozzle-to-surface distance on the heat transfer coefficient during spray cooling of brass and inconel samples has been investigated. The inverse method has been employed for the heat transfer coefficient identification. The objective function defines dimensionless deference between measured and calculated temperatures. The inverse solution starts with an assumption of a general form of an approximating function of the heat transfer coefficient distribution at the cooled surface as function of sample radius and time. The unknown parameters which define the heat transfer coefficients are determined by minimizing the objective function. The variable matrix method which utilizes the Broyden-Fletcher-Goldfarb-Shanno updating technique has been employed to minimize the objective function. Uncertainty of the inverse solution has been tested based on the assumed heat transfer coefficient distribution simulating nearly real spray cooling conditions. The numerical tests have indicated significant changes in the identified heat transfer coefficients depending on the quality of the heat conduction model. The experiments of spray cooling were conducted and the temperature was measured at the selected points in the cylindrical sample. The measured temperatures have been used as an input data for the heat transfer coefficient identification. The finite element model selected based upon numerical tests has been employed in computing the sample temperature field necessary for identifying the heat transfer boundary conditions. The objective function minimizations have given the heat transfer coefficients at the cooled surface as functions of time and surface temperature for brass and inconel samples. The influence of spray cooling parameters on the heat transfer coefficient has been discussed. © 2016 Published by Elsevier Masson SAS.