Characterization of fan spray atomizers through numerical simulation

Altimira, Mireia; Rivas, Alejandro; Larraona, Gorka S.; Antón, Raúl; Ramos, Juan Carlos

doi:10.1016/j.ijheatfluidflow.2008.12.006

Cited by 21 publications

(9 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For that purpose, a modified High Resolution Interface Capturing (HRIC) scheme, which is a combination of upwind and downwind schemes, 13 has been adopted in this study. This interpolation scheme has been previously used in spray simulation 14 and its performance compared to that of a pure second-order upwind scheme, showing a remarkably lower numerical dissipation. All numerical simulations have been run in Ansys Fluent 16.…”

Section: Computational Setup and Simulationsmentioning

confidence: 99%

Numerical modelling of spray sheet deflection on planing hulls

Olin

Altimira

Danielsson³

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part M:

Self Cite

View full text Add to dashboard Cite

This paper considers the modelling of spray formation on planing hulls. The focus is on assessing the applicability of the prevailing theories and two-dimensional and three-dimensional Computational Fluid Dynamics (CFD) simulations in the investigation of different design factors for a novel spray deflection concept. The spray deflection concept is presented and its performance is evaluated by comparison with traditional spray rails. It is found that the prevailing theory where the spray field of a planing hull is represented by a two-dimensional flat planing plate will overestimate the spray thickness, whereas the theories that are based on wedge impact are correlating well with the results from the CFD simulations. Compared to a bare hull, adding spray deflectors reduces the viscous resistance by 28% for the studied cases. The spray deflectors further redirect the spray aftwards which reduce the total drag an additional 4%. The paper also discusses various aspects on CFD modelling of spray formation.

show abstract

Section: Computational Setup and Simulationsmentioning

confidence: 99%

Numerical modelling of spray sheet deflection on planing hulls

Olin

Altimira

Danielsson³

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part M:

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the spray pattern on the slab surface is seen as one of the most critical factors. In the past few decades, a lot of research has been conducted in order to obtain the spray patterns of different types of spray nozzles and the corresponding impact pressure distributions . Usually, the characteristics of a spray nozzle are measured through several experiments.…”

Section: Introductionmentioning

confidence: 99%

“…In the past few decades, a lot of research has been conducted in order to obtain the spray patterns of different types of spray nozzles and the corresponding impact pressure distributions. [4][5][6][7] Usually, the characteristics of a spray nozzle are measured through several experiments. For example, the spray coverage and water density are evaluated by a water collector box with segmented slots, the impact pressure is determined by guiding a highly sensitive sensor with a defined surface area through the spray, and the droplet size and velocity distributions are measured by the optical imaging analyzer.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Spray Cooling with a Moving Steel Slab during the Continuous Casting Process

Lee

Tang

et al. 2018

steel research int.

View full text Add to dashboard Cite

During continuous casting secondary cooling, heat is removed from slab surface through spraying water from arrays of nozzles. Efficient and uniform heat removal without causing slab cracking is desired. The present study focuses on the development and validation of a reliable numerical model which can accurately predict spray formation from flat‐fan atomizers and the heat transfer between impinging droplets and a moving hot steel slab. Water droplets are considered as the discrete phase and are tracked in a Lagrangian framework to allow detailed modeling of breakup, coalescence, and impingement. The droplet size and the heat transfer coefficient on the slab surface are validated. Both simulations show good agreements with the experimental measurements in the center of the spray, where fine droplets are generated through multiple collisions. After droplets impinge on the slab surface, a narrow low temperature region is created inside the spray coverage, and the relative motion of the spray shifts the coverage toward the upstream. Future studies are necessary in order to improve the prediction of droplet‐air interaction near the edge of the spray, where small droplets tend to coalesce and form large ones due to a lower possibility of collision.

show abstract

“…This sophisticated design is of advantage since it offers a stronger jet impact using the same feed pressure. Experimental and numerical researches on the flat fan sprays can be found in [6]. Since 2008, our research team is working on the development and evaluation of a special large-flow-rate J. F. Yao, K. Tanaka, A. Kawahara, and M. Sadatomi Design Procedure and Performance Evaluation of a Flat-Jet Twin-Fluid Atomizer by Siphoning Liquid twin-fluid atomizer (full cone spray type) with a low pneumatic power consumption by siphoning liquid based on the invention of Sadatomi & Kawahara [1] (Fig.…”

Section: Introductionmentioning

confidence: 99%

Development of Resource-Driven Scheduling Model for Mass Housing Construction Projects

Yao¹,

Tanaka²,

Kawahara³

et al. 2015

IJET

View full text Add to dashboard Cite

A design procedure and performance evaluation of a flat-jet atomizer is described. The objective is to achieve a flat spray with minimum drop size and high performance for stipulated flow conditions. In the design process, the flat spray was formed by using in-line orifices and a rectangular outlet. The high spray performance was achieved by adopting the same working principle of a full-cone atomizer patented by Sadatomi & Kawahara (2012), which only needs pneumatic power, and the liquid can be sucked by siphoning force due to the negative pressure caused by the orifice. In the evaluation process of the new design, the influence of the outlet with different lengths and the orifice with different shapes on spray characteristics were studied, and the optimum dimension and geometry of the outlet and orifice were determined. Next, at different flow conditions, the flat-jet atomizer was experimentally tested and the suitable flow condition was proposed. Finally, practical applications of the new design (e.g. CO 2 absorption) were recommended.

show abstract

Characterization of fan spray atomizers through numerical simulation

Cited by 21 publications

References 46 publications

Numerical modelling of spray sheet deflection on planing hulls

Numerical modelling of spray sheet deflection on planing hulls

Modeling of Spray Cooling with a Moving Steel Slab during the Continuous Casting Process

Development of Resource-Driven Scheduling Model for Mass Housing Construction Projects

Contact Info

Product

Resources

About