Non-Vaporizing and Vaporizing Diesel Spray Evaluation with Experimental and Computational Approaches

  • Safiullah . UCI Combustion Laboratory, Advanced Power and Energy Program, University of California, Irvine, USA
  • Aftab Ahmed Department of Mechanical Engineering Technology, The Benazir Bhutto Shaheed University of Technology and Skill Development, Khaipur Mir’s, Pakistan
  • Aftab Khuhro Department of Mechanical Engineering, Indus University, Karachi, Pakistan
  • Intizar Tunio Department of Mechanical Engineering, Mehran University of Engineering and Technology Jamshoro, Pakistan
  • Keiya Nishida Graduate School of Engineering and Advanced Sciences, Hiroshima University, Japan
Keywords: Experimental Diesel Spray, Numerical Diesel Spray, Macroscopic Spray Characteristics, Laser Absorption Scattering (LAS), Mixture Formation

Abstract

Experimental and numerical modeling of diesel spray is necessary to understand the idea of efficient combustion and injection strategies in diesel engines. The current study aims to demonstrate the experimental and computational modeling of diesel spray under non-evaporating and evaporating conditions using three single hole injector diameters i.e. 0.133mm, 0.122mm and 0.101mm with injection pressure and injection quantity of 120 MPa and 5 mm3, respectively. First, the non-evaporating experiments are performed in high-pressure high-temperature constant volume vessel where the spray images are captured with High-Speed Video (HSV) camera using Diffused Background Illumination (DBI) method. However, evaporating spray experiments implement LAS technique to measure mixture concentration as well as visualize liquid and vapor phases of evaporating spray. The experimental results are then validated with computational simulation using AVL FIRE commercial CFD code. The CFD code uses Reynold’s Averaged Navier Stokes (RANS), KHRT and Dukowicz model as turbulence, spray breakup and evaporation models, respectively. Good agreement can be found between experimental results and CFD simulation in terms of spray tip penetration, spray angle and spray cone angle for non-evaporating case and equivalence ratio distribution, liquid/vapor penetration lengths and evaporation ratio for evaporating sprays. Thus, this work can be considered as successful validation for CI engine under similar spray conditions.

Published
2021-12-27
How to Cite
., S., Ahmed, A., Khuhro, A., Tunio, I., & Nishida, K. (2021). Non-Vaporizing and Vaporizing Diesel Spray Evaluation with Experimental and Computational Approaches. Quaid-E-Awam University Research Journal of Engineering, Science & Technology, Nawabshah., 19(2), 115-125. https://doi.org/10.52584/QRJ.1902.17