Effect of Swirl Ratio on In-cylinder Mixture Distribution in Diesel Duel Fuel Engine by Using CFD Analysis

Authors

  • Suleeporn Sombut Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, Bang Khen Campus
  • Krisada Wannatong Energy Application Technique and Engine Test Department, PTT Research and Technology Institute, PTT Public Company Limited
  • Tanet Aroonsrisopon Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, Bang Khen Campus

Keywords:

diesel dual fuel, CFD, swirl ratio, swirl flap, mixture distribution

Abstract

The current study examined use of swirl control valve in a diesel dual fuel (DDF) engine by using multi-dimensional CFD simulations. The engine conditions were under low load (approximately 30 N-m torque) operations at 1500 rpm. Results from steady flow simulations showed that using different open angles of the swirl flap provided different swirl ratios. Changes in the swirl ratio altered the mixture distribution in the cylinder. Results from engine flow simulations suggested that greater swirl ratios enhanced the mixing of the premixed methane-air mixture. The mixture became more uniformly distributed with narrower swirl flap angles. The more uniform mixture might lead to challenges in combustion control and hydrocarbon engine-out emissions.

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Issue

Vol. 27 No. 89 (2014): กรกฎาคม – กันยายน 2557

Section

งานวิจัย (Research papers)