An Experimental and CFD Analysis of a Two-Phase Flow Air Induction Nozzle with Agricultural Application

Foad Vashahi, Sothea Ra, Yong Choi, Jeekeun Lee

2016

Abstract

The two phase flow parametric study on the air induction nozzle is presented with water and air as working fluid where liquid was supplied at the pre-orifice with various inlet pressures ranged from 3 to 6 bar. The interaction between air and water at molecular level at the orifice exit leads to forming a strong shear layer intensified with increase in inlet pressure. Mean diameter and void fraction in each bubble and their individual shapes is adjusted prior to the desired criteria. Thus, it is vital to regulate the ratio of intake air to the supplied liquid so that the generated micro bubbles fit the design criteria. CFD analysis was accompanied via commercial software STAR CCM+ from cd-adapco and validated against experimental data to find the most appropriate turbulence model. Then, the chosen model is used to investigate design parameters and their effect on the desired parameters. A volume of fluid (VOF) method of RANS models used to undertake the air-water interaction. Results of such comparison revealed minor priority of the Realizable k-ε to the k-ω model. In addition, the unsteady state solution presented remarkable predictions in compare to that of steady state solution in particular predicting air behaviour.

References

  1. Wolf, T. M., Kutcher, H. R., March 2001. Spray application methods to maximize sclerotinia control in Cansada with foliar fungicide, Canola Agronomic Research Program (CARP AG#98-23), final report.
  2. Miller, P. C. H., Powell, E. S., Orson, J. H., Kudsk, P., and Mathiassen S., September 2003. Defining the size of target for air induction nozzles, The Home-Grown Cereal Authority (HGCA), project report 317.
  3. Tobi, I., Saglam, R., Turgut, M. M., October 2008. Equipment and application techniques reduced agricultural pesticide drift, 10th International Congress on Mechanization and Energy in Agriculture Antalya-TURKIYE.
  4. Butler Ellis, M. C., Swan, T., Miller, P. C. H., Waddelow, S., bradly, A., Tuck, C.R., 2002. Design Factors affecting spray characteristics and drift performance of Air induction nozzles. Biosystems Engineering 82(3), 289-296.
  5. Dorr, G. J., Hewitt, A. J., Adkins, S. W., Hanan, J., Zhang, H., Noller, B., 2013. A comparison of initial spray characteristics produced by agricultural nozzles. Crop Protection 53 (2013) 109-117.
  6. Miller, P. C. H., Butler Ellis, M. C., 2000. Effects of formulation on spray nozzle performance for applications from ground-based boom sprayers. Crop Protection 19 (2000) 609-615.
  7. Yadav, R. L, Patwardhan, A. W., 2008. Design aspects of ejectors: Effects of suction chamber geometry. Chemical Engineering Science 63 (2008) 3886 - 3897.
  8. Kandakure, M. T., Gaikar, V. G., Patwardhan, A. W., 2005. Hydrodynamic aspects of ejectors. Chemical Engineering Science 60 (2005) 6391-6402.
  9. Li, C., Li Y., Wang L., 2012. Configuration dependence and optimization of the entrainment performance for gas-gas and gas-liquid ejectors. Applied Thermal Engineering 48 (2012) 237-248.
  10. Zhu, Y., Cai, W., Wen, C., Li, Y., 2009. Numerical investigation of geometry parameters for design of high performance ejectors. Applied Thermal Engineering 29 (2009) 898-905.
  11. Pope, S.B., 2000. Turbulent Flows, Cambridge University Press.
  12. Menter, F. R., 1994. Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, Vol. 32, No. 8 (1994), pp. 1598-1605.
  13. Cd-adapco, 1987. STAR-CCM+ manual, Version 10.06.010.
Download


Paper Citation


in Harvard Style

Vashahi F., Ra S., Choi Y. and Lee J. (2016). An Experimental and CFD Analysis of a Two-Phase Flow Air Induction Nozzle with Agricultural Application . In Proceedings of the 6th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH, ISBN 978-989-758-199-1, pages 172-178. DOI: 10.5220/0005960601720178


in Bibtex Style

@conference{simultech16,
author={Foad Vashahi and Sothea Ra and Yong Choi and Jeekeun Lee},
title={An Experimental and CFD Analysis of a Two-Phase Flow Air Induction Nozzle with Agricultural Application},
booktitle={Proceedings of the 6th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH,},
year={2016},
pages={172-178},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005960601720178},
isbn={978-989-758-199-1},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 6th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH,
TI - An Experimental and CFD Analysis of a Two-Phase Flow Air Induction Nozzle with Agricultural Application
SN - 978-989-758-199-1
AU - Vashahi F.
AU - Ra S.
AU - Choi Y.
AU - Lee J.
PY - 2016
SP - 172
EP - 178
DO - 10.5220/0005960601720178