www.enurga.com

SETscan Optical Patternator

En'Urga Inc. is the industry leader in customized optical diagnostic equipment for the most challenging factory floor application. En'Urga Inc. has introduced a high frequency optical patternator, called SETScan® that is particularly suited to assure the quality of the spray produced by different types of fuel injectors, coating applicators, and other nozzles.

GDI fuel injector mounted on the optical patternator for testing.

Click to enlarge

The SETscan patternator can be used to obtain the distribution of particulate in either liquid or solid sprays. For confined applications, the SETscan patternator can provide the distribution of particulate or droplets within pre mixer pipes, catalytic converters and exhaust pipes. The patented SETscan optical patternator uses multiple sheets of laser light to obtain shadowgraph images of the spray from different view angles. The images are deconvoluted in a process similar to that used in CAT scan machines in the medical industry to provide the distribution of droplets within the spray. A photograph of the SETscan patternator being used to evaluate a GDI fuel injector is shown below.

In its native format, the SETscan patternator provides the local drop surface area density for liquids and volume fraction for particulates. The drop surface area densities obtained from the GDI fuel injector is shown to the right. The drop surface area densities are typically used to define spray angles, check intensity of spray from the different orifices of a multi-port injector, and other QA parameters.

The drop surface areas are directly proportional to total heat, mass, energy or species transfer in liquid sprays. A typical application would be fuel or urea injection into the exhaust stream to reduce pollution. The most efficient method of modifying the nozzle design so as to improve evaporation is to directly increase the total surface area that is measured by the SETscan optical patternator.

The SETscan optical patternator has much higher spatial resolution and accuracy than conventional mechanical patternators. In mechanical patternators, the stagnation layer effects over the collecting tubes causes the local results to be in error by as much as 50%. This inaccuracy increases with spatial resolution. These problems are entirely absent in the SETscan optical patternator, since all measurements are non-intrusive. The SETscan patternator is also the only optical patternator that provides quantitative information on distributions, unlike laser sheet imaging patternators, which have inaccuracies that arise from self-absorption, low dynamic range, and multiple scattering effects.

Our customers include Danfoss, Goodrich, Woodward, Purdue University, Boston Scientific, BRP, Bend Research etc. We offer both leasing and contract testing of nozzles. More information about the patternator can be obtained by visiting our website www.enurga.com or via email at info@enurga.com.

En'Urga Inc.
1291 A Cumberland Avenue
West Lafayette
IN 47906

Ph: 765 497 3269
Fax: 765 463 7004
Email: info@enurga.com
Web: www.enurga.com

 

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