This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluating Fuel Injectors with High Speed Laser Imaging Techniques
Annotation ability available
Sector:
Language:
English
Abstract
A pulsing ultraviolet laser is used to illuminate fuel injector sprays. The spray images are formed on a vidicon and presented on a TV monitor at high magnification. The mechanics of fuel atomization such as droplet formation, ligaments, impingement and evaporation are described. Such things as start time and stop time of an injector are shown. Other characteristics such as bounce of the pintle, erroneous multiple injections, poor closing and leaking are covered. An in-depth study is given showing “time slices” taken through an injected spray. Pencil beam injections, wide angle sprays, hollow cones, nonsymmetrical and skewed sprays are shown on the TV screen for injectors operating in the Static and Dynamic Mode. The Image Analyzer used in this study provided particle size counts and provides data print out showing Percent by Count, Percent by Weight, Mass Median Diameter and Sauter Mean Diameter together with Size Distribution Plots of the sprays.
Citation
Hotham, G., "Evaluating Fuel Injectors with High Speed Laser Imaging Techniques," SAE Technical Paper 861390, 1986, https://doi.org/10.4271/861390.Also In
References
- Lo R.S. Matysiewicz E.J. Hotham G.A. “Fuel Injector Atomization Measurement Using Laser Imaging Techniques” S.A.E. Technical Paper 851673 Passenger Car Meeting Dearborn, Michican Sept. 24 1985
- Hotham G.A. Laser Holography Inc. “Measurement of Aerosols in Flight by Pulsing Ultra-Violet Laser” The Royal Society London Oct. 1975
- Hotham G.A. Laser Holography Inc. “Particle Sizing by Laser Photography” Soc. of Photo-Opt. Inst. Engrs. San Diego, CA Aug. 1977
- Hotham G.A. Laser Holography Inc. “Sizing Aerosols in Real Time by Pulsing Ultra-Violet Laser Machine” NBS Spec. Pub. 412 Gaith, MD May 1974
- Peters B.D. “Laser-Video Imaging and Measurement of Fuel Droplets in a Spark Ignition Engine,” Conference on Combustion in Engineering Institution of Mechanical Engineers, Oxford University England April 1983