This $499,999 National Science Foundation project grant supports research at the University of Tennessee Space Institute to develop an in-depth understanding of ammonia sprays and combustion behavior under elevated pressures up to 80 bar. The grantee will combine laser diagnostics and numerical simulations to study non-vaporizing, vaporizing, and reacting spray conditions. Advanced laser diagnostics including 2D Raman, PLIF and rainbow reflectometry will provide unprecedented flow, temperature, droplet, and chemical intermediate distribution data. Simulations using open source and commercial codes will validate modeling capabilities. The research aims to address knowledge gaps regarding ammonia's potential as a carbon-free transportation fuel, focusing on nitric oxide and unburnt ammonia emissions which strongly influence spray and mixing processes. Insights will inform future clean combustion systems. The award is part of the National Science Foundation's $499.999M Engineering program to foster innovation in engineering research and education.
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