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Determintion of airblast atomzed spray structure using state-of-art laser diagnostics

Lookup NU author(s): Dr Ivan CK TamORCiD


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This paper presents the results of an integrated qualitative-quantitative investigation into the detailed structure of an airblast atomized gas turbine spray at near atmospheric pressure and temperature conditions. Pre-filming airblast atomizer was studied with aviation kerosine as the test fuel. Phase Doppler anemometry was utilized to interrogate droplet size, velocity and number density characteristics while high-energy, pulsed laser sheet illumination technique enabled the visualization of the condition of the liquid at atomizer exit as well as variations in droplet concentration. The spray is found to be generally inhomogeneous in structure and the extent of size, velocity, number density inhomogeneity increases as the axial distance of the measurement plane diminishes. This has implications for the attainment of a satisfactory combustion-emissions performance from modern combustors with compact reaction zones.

Publication metadata

Author(s): Jasuja AK, Tam CK

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: AIAA, SAE, ASME and ASEE, Joint Propulsion Conference and Exhibition, 28th

Year of Conference: 1992

Pages: 1-10

Sponsor(s): Research supported by CEC