An analysis of the particulate flow in cold spray nozzles

Meyer, Morten; Lupoi, Rocco

doi:10.5194/ms-6-127-2015

Cited by 33 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, a study by Lupoi [23] showed that a number of experimental observations with various nozzle geometries could not be explained by 1-way coupling CFD techniques. An improvement of the computations was shown to be achievable when increasing the detail of phase coupling for such experiments by Meyer & Lupoi [24]. As for higher particle feed rates, a work by Pattison et al [25] showed an experimental optimisation involving a full 2D-velocity field deduction using PIV in its usual sense.…”

Section: Introductionmentioning

confidence: 99%

Particle In-Flight Velocity and Dispersion Measurements at Increasing Particle Feed Rates in Cold Spray

2016

Self Cite

View full text Add to dashboard Cite

Cold Spray (CS) is attracting the interest of research and industry due to its rapid, solid-state particle deposition process and the respective advantages over conventional deposition technologies. The acceleration of the particles is critical to the efficiency of CS, and previous fluid dynamic investigations rarely consider the particle feed rate important. However, because higher particle loadings are typically used in the process, the effect of this cannot be assumed negligible. This study therefore investigates the particle velocities in the supersonic jet of an advanced CS system at low and high pressure levels and varying particle feed rates using Particle Image Velocimetry (PIV). The particle dispersion and velocity evolution along the jet axis were investigated for several feedstock materials. It was found that the average particle velocity noticeably decreases with increasing particulate loading in all cases. This effect is aggravated for lower working pressures, but mainly depends on the feedstock material, which implies more complex, volume-fraction related physics playing a role in this respect. Moreover, the velocity distribution and particle dispersion were also observed to be influenced by the feed rate, depending on the particle material. Increased particle feed rates hence affect the magnitude and distribution of impact velocity and consequently the efficiency of CS. In particular, numerical models neglecting this interconnection are required to be further improved, based on these experimental studies.

show abstract

Section: Introductionmentioning

confidence: 99%

Particle In-Flight Velocity and Dispersion Measurements at Increasing Particle Feed Rates in Cold Spray

2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Chemical energy released via combustion and electric energy released by formation of arc are the two main sources of energy that elevate the thermal energy of the particles. An innovative advancement in the coating process called the cold spray technique does not involve providing thermal energy, the whole process of coating is executed under the influence of kinetic energy [18][19][20][21][22][23].…”

Section: Thermal Spraying Techniquesmentioning

confidence: 99%

Thermal Barrier Coatings—A State of the Art Review

et al. 2020

View full text Add to dashboard Cite

Thermal barrier coatings (TBCs) have seen considerable advancement since the initial testing and development of thermal spray coating. Thermal barrier coatings are currently been utilized in various engineering areas which include internal combustion engines, gas turbine blades of jet engines, pyrochemical reprocessing units and many more. The development of new materials, deposition techniques is targeted at improving the life of the underlying substrate. Hence, the performance of the coating plays a vital role in improving the life of substrate. The scope for advancement in thermal barrier coatings is very high and continuous efforts are being made to produce improved and durable coatings. Thermal barrier coatings have the potential to address long term and short-term problems in gas turbine, internal combustion and power generation industry. The study of thermal barrier coating material, performance and life estimation is a critical factor that should be understood to introduce any advancement. The present review gives an overview of the thermal spraying techniques and current advancements in materials, mechanical properties, understanding the high temperature performance, residual stress in the coating, understanding the failure mechanisms and life prediction models for coatings.

show abstract

“…The interaction between solid particles and propellant gas in the 3D model was defined using the Lagrangian particle tracking method. Earlier studies have implemented this method to simulate particle transport in the cold spray process [17][18][19]. The 3 D model simulated t h e velocity and temperature for (2 kg/hr) spherical titanium particles as per a typical particle size distribution (5, 12, 26 and 41 µm) for cold spray deposition [6,20,21].…”

Section: Titanium Particlesmentioning

confidence: 99%

An Overview of Cold Spray Additive Technology in Australia for Melt-less Manufacture of Titanium

2020

View full text Add to dashboard Cite

The difficulty in significantly reducing the cost of titanium products is partly related to the high cost of manufacturing. This includes additive manufacturing; e.g. Electron Beam Melting (EBM) and Selective Laser Melting (SLM), as well as traditional approaches that are based on a melting process. In particular, the cost of titanium powder has placed limits on the application of additive manufacturing approaches that involve melting to broader commercial applications beyond military, aerospace and implants. More than a decade ago, Australia adopted cold spray technology as a meltless additive manufacturing technique to fabricate titanium through a strategic initiative at Commonwealth Scientific and Industrial Research Organisation (CSIRO). The high deposition rate, ~100 times faster than the other additive technologies, and the solid state deposition were amongst the rationales for investment in cold spray technology. A combination of carefully designed experiments and sophisticated 3D models were developed to assess performance of the current industrial-scale cold spray systems for commercial clients. The success and challenges of this solid state deposition technology will be detailed with a focus on real industrial impact. The future development of melt-less titanium manufacturing using cold spray will be discussed with consideration of commercial and environmental benefits.

show abstract

An analysis of the particulate flow in cold spray nozzles

Cited by 33 publications

References 25 publications

Particle In-Flight Velocity and Dispersion Measurements at Increasing Particle Feed Rates in Cold Spray

Particle In-Flight Velocity and Dispersion Measurements at Increasing Particle Feed Rates in Cold Spray

Thermal Barrier Coatings—A State of the Art Review

An Overview of Cold Spray Additive Technology in Australia for Melt-less Manufacture of Titanium

Contact Info

Product

Resources

About