Flow Characteristics of a Dual-Intake Port Diesel Engine with Guide Vanes

Document Type : Regular Article


1 College of Transportation, Jilin University, Changchun 130022, China

2 College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China



The intake port of a CA4DD diesel engine was investigated by a computational fluid dynamics (CFD) numerical simulation to enhance the intake swirl and improve the flow characteristics in the engine. The uniform design method was applied to study the influence of guide vanes with different parameters on the intake process at various valve lifts. Nine guide vane models were established and compared to the base model using CATIA™ 3D CAD software. Numerical simulations were conduct with Xflow software based on the lattice Boltzmann method (LBM). The distributions of the streamlines, vorticity, velocity and turbulent intensity in each cylinder were simulated and analyzed. The results show that the influence of the guide vanes on the swirl ratio was greater than 37%, and the flow coefficient was less than 5% compared to the base model. Scheme 5, H7.5-L50-θ20 (guide vane height of 7.5 mm, length of 50 mm and angle of 20°), provided good performance. The flow characteristics of the optimal guide vane model were verified through a steady flow test. When the guide vane aspect ratio and angle were within the ranges of 3.5-6.9 and 12.2°-20.2°, respectively, the swirl ratio had the best effect at maximum valve lift. This study provides a theoretical basis for improving the performance of dual-intake diesel engines.


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Volume 15, Issue 3 - Serial Number 64
May and June 2022
Pages 709-722
  • Received: 16 July 2021
  • Revised: 10 December 2021
  • Accepted: 12 December 2021
  • First Publish Date: 14 March 2022