Study of Swirl Effects on Spray Formations in D.I. Engines by 3D Numerical Calculations

Paper #:
  • 910264

Published:
  • 1991-02-01
Citation:
Kono, S., Terashita, T., and Kudo, H., "Study of Swirl Effects on Spray Formations in D.I. Engines by 3D Numerical Calculations," SAE Technical Paper 910264, 1991, https://doi.org/10.4271/910264.
Pages:
12
Abstract:
Spray formations of three injection directions against swirl have been investigated by means of 3D numerical calculation, in-cylinder measurement, and engine performances tests. A direct injection type engine which has a single hole nozzle and a spark plug, has been operated, and three injection directions; a forward (same) direction, a reverse one, and a right-angled (central) one against a swirl direction, have been selected. Three types of intake port, futhermore, have been selected owing to create three types of in-cylinder flow, low swirl, middle swirl, and high swirl. Spray formations in 3D cylinder flow have been investigated by using a ‘KIVA’ code. Initial conditions of in-cylinder flow are based on data which have been measured in three dimensional by a LDV system under a motoring operation. Analysis results of spray formations by numerical calculations can explain well data of engine performance tests qualitatively, and some interesting results have been obtained.
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