Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-26T12:52:11.138Z Has data issue: false hasContentIssue false
  • English
  • Français

Influence of Design Parameters on the Air/Liquid Ratio of an Air Induction Nozzle

Published online by Cambridge University Press:  29 March 2017

F. Vashahi ,
S. Ra ,
Y. Choi  and
J. K. Lee
F. Vashahi
Affiliation:
Department of Mechanical System EngineeringChonbuk National UniversityJeonju, South Korea
S. Ra
Affiliation:
Department of Mechanical System EngineeringChonbuk National UniversityJeonju, South Korea
Y. Choi
Affiliation:
Rural Development AdministrationFarming Automation DivisionJeonju, South Korea
J. K. Lee*
Affiliation:
Division of Mechanical System EngineeringChonbuk National UniversityJeonju, South Korea
*
*Corresponding author ([email protected])
Get access

Abstract

A two-phase flow parametric study on an air induction nozzle with water and air as the working fluids is presented. Liquid was supplied at the pre-orifice with various inlet pressures ranging from 3 to 6 bar. The interaction between air and water at the molecular level at the orifice exit leads to formation of a strong shear layer that is intensified with the increase in inlet pressure. Thus, it is vital to regulate the ratio of the intake air to the supplied liquid so that the generated micro bubbles fit the design criteria. CFD analysis was conducted using the commercial software STAR CCM+ from Siemens and validated against experimental data to investigate the design parameters and their effect on the ALR. A volume of fluid (VOF) method of the RANS models was used to undertake the air-water interaction. Parameters such as the throat, air orifice, and air inlet diameter, along with the diffuser angle, were investigated. It was found that certain parameters such as the throat diameter have a more significant effect on the air/liquid entrainment ratio than other parameters.

Keywords

Two-phase flowAir induction nozzle (AIN)ALRVOF model
Type
Research Article
Information
Journal of Mechanics , Volume 34 , Issue 3 , June 2018 , pp. 375 - 385
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Wolf, T. M. and Kutcher, H. R., “Spray Application Methods to Maximize Sclerotinia Control in Canola with Foliar Fungicide,” CARP 9823, Canola council of Canada (2001).Google Scholar
2. Vallet, C. T., “Characteristics of Droplets from Single and Twin Jet Air Induction Nozzles: A preliminary investigation,” Crop Protection, 48, pp. 63–68 (2013).CrossRefGoogle Scholar
3. Miller, P. C. H., Powell, J. H., Kudsk, O. P. and Mathiassen, S., “Defining the Size of Target for Air Induction Nozzles,” PROJECT REPORT 317, Home-Grown Cereals Authority (2003).Google Scholar
4. Saglam, T. R. and Turgut, M.M., “Equipment and Application Techniques Reduced Agricultural Pesticide Drift,” 10th International Congress on Mechanization and Energy in Agriculture, Antalya, Turkey (2008).Google Scholar
5. Sikkema, P. H. et al., “Flat fan and air induction nozzles affect soybean herbicide efficacy,” Weed Biology and Management, 8, pp. 31–38 (2008).CrossRefGoogle Scholar
6. Dorr, G. J. et al., “A comparison of initial spray characteristics produced by agricultural nozzles,” Crop Protection, 53, pp. 109–117 (2013).Google Scholar
7. Xiao, L. and Long, X., “Cavitating flow in annular jet pumps,” International Journal of Multiphase Flow, 71, pp. 116–132 (2015).Google Scholar
8. Yang, X., Long, X. and Yao, X., “Numerical investigation on the mixing process in a steam ejector with different nozzle structures,” International Journal of Thermal Sciences, 56, pp 95-106 (2012).CrossRefGoogle Scholar
9. Shah, A., Chughtai, I. R. and Inayat, M. H., “Experimental study of the characteristics of steam jet pump and effect of mixing section length on direct-contact condensation,” International Journal of Heat and Mass Transfer, 58, pp. 62–69 (2013).CrossRefGoogle Scholar
10. Fan, J. et al., “Computational fluid dynamic analysis and design optimization of jet pumps,” 10th ICFD Conference Series on Numerical Methods for Fluid Dynamics (ICFD 2010), Computers & Fluids, 46, pp. 212–217 (2011).Google Scholar
11. Zhu, Y., Cai, W., Wen, C. and Li, Y., “Numerical investigation of geometry parameters for design of high performance ejectors,” Applied Thermal Engineering, 29, pp. 898–905 (2009).Google Scholar
12. Hemidi, A., Henry, A., Leclaire, S., Seynhaeve, J.-M. and Bartosiewicz, Y., “CFD analysis of a supersonic air ejector. Part II: Relation between global operation and local flow features,” Applied Thermal Engineering, 29, pp. 2990–2998 (2009).CrossRefGoogle Scholar
13. Long, X. P., Zeng, Q. L., Yang, X. L. and Xiao, L., “Structure optimization of an annular jet pump using design of experiment method and CFD,” IOP Conference Series: Earth and Environmental Science, 15, (2012).Google Scholar
14. Miller, P. C. H. and Butler Ellis, M. C., “Effects of formulation on spray nozzle performance for applications from ground-based boom sprayers,” Crop Protection, 19, pp. 609–615 (2000).Google Scholar
15. Butler Ellis, M. C. et al., “PM—Power and Machinery: Design Factors affecting Spray Characteristics and Drift Performance of Air Induction Nozzles,” Biosystems Engineering, 82, pp. 289–296 (2002).CrossRefGoogle Scholar
16. Yadav, R. L. and Patwardhan, A. W., “Design aspects of ejectors: Effects of suction chamber geometry,” Chemical Engineering Science, 63, pp. 3886–3897 (2008).Google Scholar
17. Kandakure, M. T., Gaikar, V. G. and Patwardhan, A. W., “Hydrodynamic aspects of ejectors,” Chemical Engineering Science, 60, pp. 6391–6402 (2005).Google Scholar
18. Li, C., Li, Y. and Wang, L., “Configuration dependence and optimization of the entrainment performance for gas–gas and gas–liquid ejectors,” Applied Thermal Engineering, 48, pp. 237–248 (2012).Google Scholar
19. STAR-CCM Version 10 Manual, Siemens (2015).Google Scholar
20. Pope, S. B., Turbulent Flows, 2nd Edition, Cambridge University Press, New York, pp. 182–189 (2000).Google Scholar
21. Waclawczyk, T. and Koronowicz, T., “Comparison of CICSAM and HRIC high-resolution schemes for interface capturing,” Journal of Theoretical and Applied Mechanics, 46, pp. 325–345 (2008).Google Scholar