Naslov
Numerical Investigation of the Spray Quenching Process for Industrial Applications

Autori
Baleta, Jakov ; Vujanović, Milan ; Mikulčić, Hrvoje ; Pachler, Klaus ; Wang, Jin

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Digital Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES / Ban, Marko et al. - Zagreb : Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, 2017

Skup
12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES

Mjesto i datum
Dubrovnik, Hrvatska, 04.10.2017. - 08.10.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
spray quenching ; CFD ; spray/wall interaction ; heat transfer

Sažetak
Water spray quenching distinguished itself as a promising method for industry production, especially for the parts which require good mechanical strength while simultaneously retaining the initial toughness. During the workpiece cooling microstructure change is taking place, with final structure possessing improved mechanical properties. Residual stresses and resulting mechanical properties strongly depend upon the intensity of wall/droplet heat transfer. Studies have shown that the heat transfer process during the spray quenching is mostly influenced by the spray impingement density, particle velocities and sizes. Experimental investigation is becoming increasingly expensive and time consuming, especially in the light of stringent requirements on final product quality, so virtual prototyping appears as an attractive alternative. Nonetheless, the application of advanced numerical methods still plays insufficient role in the development of the production process, in spite of the fact that industry today is facing major challenges that can be met only by development of new and more efficient systems using advanced tools for product development, one of which is computational fluid dynamics (CFD). Taking the above stated, the object of this research is numerical simulation of spray quenching process in order to determine validity of mathematical models implemented within the commercial CFD code Fire, especially droplet evaporation/condensation and droplet-wall heat transfer models. After review of the relevant literature suitable benchmark case was selected and simulated by employing discrete droplet method for the spray treatment and Eulerian approach for the gas phase description. The simulation consists of spray calibration according to the experimental data. Once the spray is calibrated, it is employed for the simulation of spray quenching process. Finally, the validity of the relevant numerical spray models was assessed based on the conducted simulations and recommendations for further improvements were given.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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