Open AccessAnalysis of Jet Characteristics Among Various Cold Spray Nozzles
Author(s) -
Sai Rajkumar Vadla,
Jeffrey Doom
Publication year - 2018
Publication title -
journal of thermal spray and engineering
Language(s) - English
Resource type - Journals
ISSN - 2582-1474
DOI - 10.52687/2582-1474/115
Subject(s) - nozzle , mechanics , conical surface , jet (fluid) , spray nozzle , spray characteristics , turbulence , materials science , discharge coefficient , flow (mathematics) , mechanical engineering , physics , engineering
This research is conducted mainly to analyze the jet characteristics of various cold spray nozzles. This study presents the theoretical and practical aspects of Cold Spray process modeling, discusses multiple numerical analysis research areas, and determines the significant parameters to be considered while developing a custom cold spray setup and exhibits analysis-based correlations. The simulations were performed on some meshes of different density using the SST turbulent model in Star CCM+ solver. For the first time, in this work, the jet characteristics inside a step drilled nozzle was presented; Furthermore, shock diamond formation was found inside the divergent section of step drilled nozzle which strongly influence the flow regime with sharp fluctuations. The comprehensive comparison between step drilled nozzle, conical nozzle and curved nozzle indicates that curved nozzle results in slightly higher nozzle exit velocity. However, results have suggested that the curved nozzle can achieve much higher velocities by optimizing the nozzle length.