People Graduate Students

Graduate Students

Subodh is investigating nozzle design and its effect on emissions of a natural gas combustor.

Sampath’s primary research involves understanding chemical kinetics and reaction pathways for heavy hydrocarbon fuels using Laminar Flame Speed measurements at engine operating conditions. He is also involved in the development of image processing algorithms to perform sub-pixel image registration for 3-D Planar Doppler Velocimetry (PDV).

Stewart is working on developing infrared laser-absorption diagnostic for ethylene concentration and supporting completion of high-pressure shock tube facility.

Tim works on flame imaging and data analysis for an optically accessible, single-element liquid fuel rocket combustor. His project attempts to utilize Chemiluminescence and short wave IR imaging to measure flame shape and position in the high pressure, sooting conditions of a liquid hydrocarbon rocket. The results will correlate LES models for the computational group.

Debolina’s research focuses on turbulent combustion particularly, analytical modeling and simulations to understand turbulence-chemistry interactions. The simulations include direct numerical simulations for turbulent premixed flames and counterflow flames and perfectly stirred reactor models for laminar flames to identify shifts in chemical pathways for lighter fuels such as hydrogen, methane and heavier fuels such as n-dodecane. The analytical aspect of the work intends to identify different parameters and conditions that affect this interaction. This understanding is pivotal to better develop chemistry models for turbulent premixed flames.

Chris studies the hydrodynamic stability of reacting swirling flows. His work is motivated by the destructive coupling of fluid motion and heat release through a phenomenon known as thermo-acoustic instability, which is a major challenge facing current and future clean combustion technology.

Hanna performs collection and processing of experimental data for liquid, swirling flows at elevated pressures. The data, such as simultaneous sPIV, OH-PLIF and fuel-PLIF, is used to visualize the flow field, liquid fuel spray and flame regions.

Valentin is working with Prof. Seitzman.

Dan experimentally investigates the interaction of turbulence and chemical reactions. In the past, his focus has been on the development of laser induced flame kernels in isotropic turbulence convected with incompressible and compressible mean flows. Currently he is concentrating on the mixing processes of jets in supersonic crossflows. That is, fundamental fluid dynamics and ways to enhance/control mixing, flame anchoring and combustion.

Xiang Gao is currently working on two related projects: 1) Active combustion control using ozone. This proposed technique employs ozone injection to significantly enhance the combustion process at extreme conditions, such as these in scrarmjet engines. 2) complex chemical kinetics analysis. Systematic analytics tools are developed in this project to reduce the kinetic mechanism and analyze the interaction of chemical pathways.

Edwin’s research involves the design of next-generation high-temperature, low-NOx combustors for gas turbine engines to meet ever-stringent emissions requirements whilst achieving unprecedented cycle efficiencies. His design process involves the prudent application of optimization algorithms to various chemical reactor models of combustors to find the best architectures and configurations.

Henderson’s research involves the quantifying of pressure and fuel composition effects on the turbulent flame speed. Current work is looking at multi-component fuels at broad range of turbulence intensities, equivalence ratios and pressures. The ultimate goal is to develop a robust physics-based model of turbulent flame characteristics.

Miad’s research involves shock-driven autoignition delay studies of hydrocarbon fuels and development of new predictive chemical kinetics mechanisms assisted by experiments.

Jeong-Won works on the Transverse Combustion Instability Experimental Investigation

Sayop works on computational turbulent spray combustion.

Yong Jea works on combustion instability and acoustics.

Yoon studies primary break-up of IC engine injector sprays, using spectral microscopy.

Jamie is working on the response of swirl flames to transverse acoustic excitation.

Gina’s research focuses on improving fuel injection and spray formation models for direct injection engine simulations. Towards this goal, she has developed a new experimental technique to quantify mean droplet sizes along the periphery of the fuel spray. These measurements are currently being used to inform the development of a spray breakup model, capable of linking injector nozzle details with the combustion process over a wide range of injection and in-cylinder conditions.

Gabrielle Martinez is an experimentalist working in spray combustion research in order to understand the fundamental physics of spray atomization. This experimental research will aid in the of validation of spray atomization submodels.

Alex is currently conducting an experimental investigation on an advanced reheat combustor concept which uses swirl to enhance burning rates. His work aims to provide physical insight and experimental data which will enable the development of more compact combustors for high-performance aircraft. He previously worked on an experimental study which elucidated thermoacoustic instability and blow-off mechanisms in bluff-body stabilized flames with closely-coupled fuel injection.

Alex is studying the relationship between acoustic oscillations and unsteady heat release in a combustor.

Athanasios works on Single Nozzle Premixer Robustness Testing

Vedanth’s current research involves studying a variant of the canonical problem of a reacting jet in a vitiated cross flow (JICF). The research is aimed at studying the hydrodynamic stability of the jet by identifying the large scale structures inherent to the reacting jet in cross flow. This is done using laser based diagnostic techniques such as time-resolved Particle Image Velocimetry(PIV) as well as Planar Laser Induced Fluorescence(PLIF) to study the flame structure of these flows.

Nick’s research studies the performance characteristics of alternative aviation fuels. Specifically, he studies how various fuel properties affect flame extinction limits.

Jacob is working on an investigation of hydrodynamic instabilities as fundamental mechanism in thermo-acoustic oscillations.

Matthew’s current research involves investigating variations on the canonical problem of a reacting jet in vitiated cross flow and its impact on nitric oxide emissions. The research seeks to assist in enabling higher gas turbine efficiency by allowing higher turbine inlet temperatures while maintaining emission levels that meet current and future standards. Other research interests include the application of high speed laser diagnostics to reacting flows.

Travis is experimentally studying the effects of transverse acoustic forcing on swirl-stabilized flames through the use of diagnostics such as sPIV, OH-PLIF, and Chemiluminescence.

Sukruth studies the effect of turbulence on harmonically forced flame wrinkles.

Jordan is currently volunteering on the transverse instability characterization project for MHI. Designing fuel delivery system and updating control system. His primary interest is launch vehicle propulsion system design.

Sheng works on ignition of alternative jet fuels.

Aimee is working on an experimental investigation of autoignition in a Jet-A fuel spray. She is using high speed diagnostics to simultaneously visualize autoignition kernels and polydisperse fuel sprays.

Bin’s research is focusing on study chemical kinetics of ethylene ozonolysis reactions by conducting experiments on a flow reactor.  He is also studying autoignition and kinetics using a Super Rapid Compression Machine (SRCM).

Boni is working on a study of high pressure and temperature spray combustion process: Currently she is focusing on promoting leaner lifted flame combustion at in-cylinder conditions by method of ducted fuel injection.