Abstract
Application of Phase Doppler Interferometry and Ultra Small Angle X-ray Scattering to the Near Field Spray from a Reference Simplex Atomizer
Highlights
As a potential alternate or compliment to the traditional phase Doppler interferometry (PDI) measurements of the droplet sizes and velocities, Ultra-Small Angle X-Ray Scattering (USAXS) can be used to quantify details regarding the degree of atomization
Emphasis was placed on manipulating the PDI point measurements into corresponding projected line averages that are inherent to the USAXS and radiography results
Identifying droplet characteristics and measuring or predicting the droplet size of fuel sprays is fundamental to the advancement of numerous applications in combustion systems, process industries, agriculture, medicine, and meteorology [1]
Summary
Identifying droplet characteristics and measuring or predicting the droplet size of fuel sprays is fundamental to the advancement of numerous applications in combustion systems, process industries, agriculture, medicine, and meteorology [1]. Data in the immediate near field of atomizers are challenging to obtain due to non-spherical droplets and potentially high optical thickness. Another promising method for obtaining drop size is Ultra-small-angle x-ray scattering (USAXS) [2, 3]. A need for a “standard spray” [6] for comparison of diagnostics and modeling and nonbiased data interpretation is evident The effectiveness of this approach has been illustrated via the “standard sprays” established to represent diesel injection by the Engine Combustion Network (ECN) [7]. To date 10 builds of this particular reference spray are available for users This particular atomizer represents one class of injector found in wide ranging applications including combustion systems such as aeroengines and liquid fueled heaters
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