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Experimental Methods for Engineers

The influence of cavitation on the internal flow and the spray characteristics in diesel injection nozzles

Using spray momentum flux measurements to understand the influence of diesel nozzle geometry on spray characteristics

Relationship Between Diesel Fuel Spray Vapor Penetration/Dispersion and Local Fuel Mixture Fraction

A comprehensive review of aging and fatigue phenomena in bulk polycrystalline ferroelectrics is presented. Three material classes are covered, namely the most widely used Pb[Zr1−xTix]O3 (PZT) ceramics and lead-free materials, including those based on bismuth sodium titanate Bi1/2Na1/2TiO3 (BNT) and alkali niobate [KxNa1−x]NbO3 (KNN). Aging is studied in poled and unpoled states both experimentally and theoretically. The variety of different loading regimes for fatigue includes DC electric field, unipolar, sesquipolar and bipolar cycling and all these differently combined with mechanical loading at different frequencies and temperatures. The role of device geometries and electrode materials is addressed and models describing charge migration and defect dipole re-orientation are discussed in the context of recent experimental studies.

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Mechanisms of aging and fatigue in ferroelectrics

Diesel nozzle geometry influence on spray liquid-phase fuel penetration in evaporative conditions

A new technique has been presented to characterize the internal geometry of diesel injection nozzles. This technique is based on the impression of silicone molds. The advantages of this technique, compared with other techniques, are that it is possible to see and measure internal zones of the nozzle like the inlet curvature radius, and it is a non-destructive method. The technique has been validated, with positive results.

Jaime Gimeno

Papers

Using spray momentum flux measurements to understand the influence of diesel nozzle geometry on spray characteristics

Diesel nozzle geometry influence on spray liquid-phase fuel penetration in evaporative conditions

New technique for determination of internal geometry of a diesel nozzle with the use of silicone methodology

A new methodology for correcting the signal cumulative phenomenon on injection rate measurements

Effects of nozzle geometry on direct injection diesel engine combustion process