A master thesis from Aalborg University
CFD study of in-line zinc arc spray: Parametric study of spray pattern
[CFD studie af in-line zink arc spray: Parametrisk studie af spray mønstre]
Author(s)
Term
4. semester
Education
Publication year
2019
Submitted on
2019-05-31
Pages
40 pages
Abstract
Denne raport er lavet som et studie med målet at optimere på en zink arc spray for at give en bedre belægnings kvalitet på en substratprofil. Dette studie var lavet ved brug af en CAD model af en emuleret produktionsprocess. Dette inkludere et sprøjte hus som indeholder sprøjte processen, en substratprofil som zinken bliver sprøjtet på, og en luft strøm som skal emulere et ventilations system. ANSYS Fluent er anvendt som CFD modelleringsværktøj med en partikelstørrelsesfordeling opbygget som en Rosin-Rammler størrelsesfordeling og en partikel frigivelses radius på 0.3 mm. Parameterne som blev undersøgt var sprøjtevinklen på substratprofilen og sprøjteafstanden til profilen. Ved at undersøgelse effekten af at ændre sprøjtevinklen, blev den optimale sprøjtevinkel fundet til at være 60 grader, da dette resulterede i den bedste dækning of substratprofilen. Under undersøgelsen af effekten af at ændre sprøjteafstanden, var det muligt at identificere at den optimale sprøjteafstand på 140 mm resulterede i den mest jævnt fordelte dækning af substratprofilen.
This report is made as a study to optimize upon a zinc arc spray to give a better coating quality on a substrate profile. The study was made using a CAD model of an emulated production process including a housing for the spraying process, a substrate profile that the zinc is sprayed upon, and an air flow that emulates a ventilation system. ANSYS Fluent is used as the CFD modeling tool, with a particle size distribution constructed as a Rosin-Rammler size distribution and a particle release radius of 0.3 mm. The parameters that were investigated was the spray angle onto the substrate profile and the spray distance to the profile. From the investigation of the effect of changing the spray angle, it was found that the optimal angle would be a spray angle of 60 degree as this resulted in the best coverage of the substrate profile. With the investigation of the effect of changing the spray distance, it was determined that a spray distance of 140 resulted in the most evenly distributed coating coverage of the substrate profile.
Keywords
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