Benjamin Bizjan (Avtor), Alexander Kuznetsov (Avtor), Andrej Jeromen (Avtor), Edvard Govekar (Avtor), Brane Širok (Avtor)

Povzetek

This paper presents a high-speed thermal imaging method using a visible light camera, with application to the laser droplet generation process (LDG). In the experiment, a nickel wire-end was exposed to a collimated laser beam, and the subsequent process of wire melting, pendant droplet formation and its detachment were recorded by a high speed camera. Instantaneous temperature fields of the metal surface were calculated from the imaging data and were characterized by a very good spatial and temporal resolution (200 x 400 pixels at 13,837 frames per second). The droplet temperature could be accurately calculated between the melting point of nickel (1455 °C) and approximately 1950 °C, where image saturation started to occur. The remaining pendant droplet was shown to cool much more rapidly than the detached droplet, which is due to the heat conduction to the solid wire. Except for the time immediately after the droplet separation, the temperature distribution across the melt droplets was found to be quite uniform. Apart from the possibility of temperature field calculation, it was also demonstrated that the high-speed images of the LDG process can accurately capture contours and oscillation dynamics of melt droplets.

Ključne besede

laser droplet generation;temperature measurement;high-speed camera;melting;droplet detachment;fluid dynamics;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 536.52:681.783.332(045)
COBISS: 14815515 Povezava se bo odprla v novem oknu
ISSN: 1359-4311
Št. ogledov: 1273
Št. prenosov: 656
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: laserska tvorba kapljic;merjenje temperature;hitre kamere;taljenje kapljic;ločevanje kapljic;dinamika tekočin;
Vrsta dela (COBISS): Članek v reviji
Konec prepovedi (OpenAIRE): 2018-08-29
Strani: str. 298-305
Zvezek: ǂVol. ǂ110
Čas izdaje: Jan. 2017
DOI: 10.1016/j.applthermaleng.2016.08.182
ID: 10999482
Priporočena dela:
, magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
, zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo
, ni podatka o podnaslovu