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Instantaneous Fuel Flow Rates Measured in High Pressure Pipeline of Gasoline Direct Injection Engine
Technical Paper
2001-01-1973
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Transient dynamics of two injection flows, upstream and downstream from a swirl injector, are investigated. Capillary n-heptane pipe flow is measured using laser Doppler anemometer to obtain the instantaneous time series of centerline velocity and to reconstruct a series of instantaneous and integrated flow rates and pressure gradients. A collimated laser sheet and a high-speed video camera visualize injected spray flow. Finally, the phase Doppler anemometer measurements are introduced to analyze instantaneous patterns of droplets, velocity-size and number density in the fuel spray.
All measurements are employed at similar temporal resolution close to 30 μs. Results indicate that both flows are strongly time-dependent and well correlated in time-phases. Initial transitions are completed by 100 μs. Opening or closing of the injector valve affects both flows as strong delta oscillation causes spray penetration dynamics and a post injection effect.
A combination of non-intrusive laser-based techniques allows indication of the basic injection and spraying characteristics needed to optimize high-pressure fuel injectors and the late injection combustion mode.
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Citation
Ismailov, M., "Instantaneous Fuel Flow Rates Measured in High Pressure Pipeline of Gasoline Direct Injection Engine," SAE Technical Paper 2001-01-1973, 2001, https://doi.org/10.4271/2001-01-1973.Also In
References
- Bosch W 1964 268 282
- Durst F Ismailov M Trimis D 1996 Measurements of instantaneous flow rates in periodically operating injection systems J Experiments in Fluids 20 178 188
- Hanjalic K Jakirlic S Hadzic I 1993 Computations of oscillations turbulent flows at transitional Re-numbers Turb Shear Flows 9 Springer Verlag 323 342
- Ismailov M Ishima T Obokata T Tsukagoshi M Kobayashi K 1997 Control of Transient Injection and Fast Spray Dynamics Proc. ICLASS-'97 Seoul, Korea 1015 1022
- Lambossy P 1952 Helv Phys. Acta 25 371 386
- Obokata T Long W Ishima T 1996 PDA and LDA measurements of large angle hollow cone spray proposed for hot-premixed combustion type diesel engine SAE Technical Paper Series 960772
- Sankar SV Maher KE Robart DM Bachalo WD 1997 Spray characterization using a planar droplet sizing technique Proc. ICLASS-'97 Seoul, Korea 649 656