United States Department of Transportation
i
Spray Characteristics of a Hybrid Airblast Pressure-Swirl Atomizer at Cold Start Conditions Using Phase Doppler Anemometry
-
2018-07-01
-
[PDF-641.64 KB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:There has been an increased interest in alternative aviation fuels to reduce pollutant emissions to mitigate climate change and diversify the fuel. The presented work examines the spray characteristics of two aviation fuels and one fuel candidate as part of a larger effort by the National Jet Fuel Combustion Program (NJFCP). A hybrid airblast pressure-swirl atomizer was used to investigate the spray characteristics of Jet-A (A-2), JP-5 (A-3), and a JP-5/farnesane blend (C-3) at cold start conditions: ambient gas pressure Pvessel = 1.01 bar, fuel temperature Tfuel =239 K, and atomizing gas temperature Tgas = 239 K. The pressure drop across the swirler of the atomizer (?P/P ) was varied in order to investigate the effect on the spray characteristics. Phase Doppler anemometry (PDA) was used to measure the drop size and drop velocity of the spray at multiple axial locations downstream of the swirler exit plane. The spray was measured as far as 30 mm from the centerline of the spray in 5 mm increments and in both radial directions. The D10, D32, and MMD were used as representative diameters to characterize the mean drop size. The mean axial drop velocity with its root-mean square was used to characterize drop velocity. The investigation showed the D10, D32, and MMD decreased with increases in ?P/P for all fuels. It was observed that no significant variations occurred among the test fuels in D32, MMD, and Uz comparisons. Spray measurements at cold start conditions were compared with the measurements from a previous investigation at lean blowout (LBO) conditions.
-
Content Notes:The Proceedings of past ILASS – Europe and ICLASS International Conferences is available in the electronic form. The access to the published proceedings is unrestricted.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
