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Energies 2017, 10(12), 1950; https://doi.org/10.3390/en10121950

Characterization of the Inlet Port Flow under Steady-State Conditions Using PIV and POD

1
Mechanical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
2
Advanced Engineering Centre, School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, UK
3
Nust Institute of Civil Engineering (NICE), National University of Science and Technology (NUST), 44000 Islamabad, Pakistan
4
Department of Mathematics, COMSATS Institute of Information Technology, park road, chak shehzad campus, tarlai kalan, 44000 Islamabad, Pakistan
*
Author to whom correspondence should be addressed.
Received: 18 October 2017 / Revised: 8 November 2017 / Accepted: 9 November 2017 / Published: 24 November 2017
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Abstract

The current study demonstrates an experimental investigation of the tumble flow structures using Particle Image Velocimetry (PIV) under steady-state conditions considering the central vertical tumble plane. The experiments were carried out on a four-valve, pent-roof Gasoline Direct Injection (GDI) engine head at different valve lifts and with a pressure difference of 150 mmH2O across the intake valves. Furthermore, the Proper Orthogonal Decomposition (POD) analytical technique was applied to PIV-measured velocity vector maps to characterize the flow structures at various valve lifts, and hence the different rig tumble values. The results show that at low valve lifts (1 to 5 mm), 48.9 to 46.6% of the flow energy is concentrated in the large (mode 1) eddies with only 8.4 to 11.46% in mode 2 and 7.2 to 7.5 in mode 3. At high valve lifts, it can be clearly seen that some of the energy in the large eddies of mode 1 is transferred to the smaller flow structures of modes 2 and 3. This can be clearly seen at valve lift 10 mm where the values of the flow energy were 40.6%, 17.3%, and 8.0% for modes 1, 2, and 3, respectively. View Full-Text
Keywords: GDI engine; tumble motion; PIV; flow bench; POD GDI engine; tumble motion; PIV; flow bench; POD
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El-Adawy, M.; Heikal, M.R.; A. Aziz, A.R.; Siddiqui, M.I.; Munir, S. Characterization of the Inlet Port Flow under Steady-State Conditions Using PIV and POD. Energies 2017, 10, 1950.

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