Open AccessTime-dependent line-of-sight extinction tomography for multi-hole GDI injectors
Author(s) -
Yudaya Sivathanu,
Jae-Yong Lim,
Varun Kulkarni
Publication year - 2016
Publication title -
international journal of spray and combustion dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 16
eISSN - 1756-8285
pISSN - 1756-8277
DOI - 10.1177/1756827716673522
Subject(s) - injector , nozzle , extinction (optical mineralogy) , plume , centroid , optics , mechanics , transient (computer programming) , rotation (mathematics) , materials science , tomography , gasoline , fuel injection , environmental science , physics , meteorology , aerospace engineering , computer science , engineering , artificial intelligence , thermodynamics , operating system
Finely atomized sprays from multi-hole gasoline direct injection (GDI) fuel injectors make them an ideal choice for automobile applications. A knowledge of the factors affecting the performance of these injectors is hence important. In the study presented here, we employ statistical extinction tomography to examine the transient characteristics of two GDI fuel injectors with five and six holes. Two axial locations, 25 mm and 35 mm from the injector exit, are chosen for experimental measurements, and the dependence of injection pressure and ambient temperature on plume locations and angles is examined from these measurements. A pressure chamber with opposing windows is used which permits the nozzle to be rotated 12 times (30° each rotation) to obtain information on the complete spray structure. Additionally, the plume centroid locations are measured and compared with those obtained with a mechanical patternator. The centroid locations from the two instruments compare favorably.