Cyclic Variability of Pulsed Spray Vapor Fields
A two wavelength extinction technique is used to quantitatively measure the temporal fuel vapor field produced by pulsed automotive fuel injectors. Line-of-sight measurements are spatially deconvoluted to yield a picture of the overall, cycle-averaged, radial vapor concentration profiles. Vapor measurements are also given for single, consecutive, injection pulses, showing cycle-to-cycle variations in the vapor field. Methods to characterize the cyclic variability in the vapor field of a pulsed spray are discussed. As an illustrative example, the differences between an air assist and a non-air assist injector are shown as a function of duty cycle and axial location.
J. H. Wright and J. A. Drallmeier, "Cyclic Variability of Pulsed Spray Vapor Fields," Experiments in Fluids, Springer Verlag, Sep 1998.
The definitive version is available at http://dx.doi.org/10.1007/s003480050237
Mechanical and Aerospace Engineering
Keywords and Phrases
Cyclic Variability; Vapor Measurement; Vapors
Article - Journal
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