3P Lab research
3P Lab research

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Sponsored Projects

ARPA-E, Plasma‐assisted in‐situ reforming of flare gases to achieve near‐zero methane emissions, Period 2022-2025, $2.4M. The concept utilizes plasma-assisted combustion to enhance flare methane destruction efficiency. Read More

ARPA-E, Reducing emission of methane through advanced radical kinetics and adaptive burning in large engines (REMARKABLE), Period 2022-2025, $2.8M. The concept involves plasma and advanced engine controls to reduce methane slip. The technology is targeting the large two-stroke engines used by gas pipeline companies. Read More

Department of Energy, Plasma-assisted pre-chamber ignition system for highly dilute stoichiometric heavy-duty natural gas engines, Period 2022-2025, $2.1M. Novel plasma ignition system to improve pre-chamber combustion dynamics.

Research Topics

Fundamentals of Low-Temperature Plasma

Pin-to-pin plasma discharge
Pin-to-pin plasma discharge in air at 2.4 bar

Low-temperature plasma has the potential to bring radical advancement in existing technologies in energy, microelectronics, automotive, aviation, environment, and manufacturing. The field of low-temperature plasma is exceptionally interdisciplinary with numerous unsolved grand scientific questions. For example, unpredictable plasma streamer branching and filamentation processes in high-pressure gases and liquids, surprising collective motion exhibited by plasma, stochastic and turbulent behavior of plasma discharge, plasma instability, plasma-material interaction, generation of selective radicals and charged species such as O3, OH, atomic oxygen, etc. to name a few. 3P Lab research examines low-temperature plasma behavior at high-pressure, transitions between different plasma regimes, and underlying physical governing mechanisms.

Carbon-Neutral Synthetic E-Fuels and Biofuels

Rapid characterization and optimization of carbon-neutral E-fuels and biofuels

Clean carbon-neutral ‘designer’ synthetic fuels produced from renewable sources emit ‘zero’ net greenhouse gas emissions. Currently, 3P Lab is designing a unique instrument, high-throughput, optical research engine facility that will help discover new E-fuels and biofuels. The most unique feature of the optical engine is the capability of rapidly evaluating a large number of E-fuel samples of milliliter volumes. No existing facility is capable of performing rapid characterization of such small volume fuel samples. The high-quality optical data will provide a fundamental understanding of the complex chemistry, turbulence, and fluid dynamics processes. The instrument will be equipped with advanced plasma and corona ignition system to enable mixed-mode operation. The proposed instrument’s unique capabilities will allow a transformative platform for researchers to create and optimize innovative carbon-neutral fuel molecules that will lead to decarbonizing the transport sector and meet the stringent climate goals.

Plasma Propulsion

Plasma propulsion
Micro-propulsion device

Plasma-based space propulsion systems are highly efficient compared to existing chemical propulsion and can reduce fuel requirements by a factor of 100. Plasma thrusters are best suited for deep space exploration. However, the reliability and longevity of the thruster due to the harmful interactions between reactive plasmas and complex thruster surface is one of the major challenges in plasma propulsion. One possible solution to this problem is to use electrodeless systems where the plasma is created and accelerated by the action of electromagnetic waves rather than by the presence of physical electrodes immersed in the flow. 3P Lab aims to develop a lightweight plasma thruster that can handle increasing levels of power in a relatively small package.

Plasma in Transportation and Environmental Applications

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Plasma ignition in a gasoline engine running at 1300 rpm

The unique characteristics of low-temperature plasma can radically change existing engine operations. For example, low-temperature plasma ignition for future mixed-mode combustion, plasma actuators for near-wall flow controls, plasma remediation of greenhouse and toxic engine emission gases, and plasma trap for hazardous particulate matter. Plasma-assisted ignition has several advantages over conventional spark ignition systems, including greater control of ignition delays and the location of the ignition kernel, faster ignition facilitated by radicals and charged species, virtually zero spark plug erosion. 3P Lab is currently developing a fully functional prototype of a plasma igniter.

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Dielectric barrier surface plasma discharge

A fast and accurate actuation is required to control high-velocity high Reynolds number flows. 3P Lab searches for innovative ways such as DC discharge, distributed corona discharge, transient nanosecond discharge, smart materials for state-of-the-art plasma electrode design, etc. to effectively control subsonic, transonic, and supersonic flows. Emissions from automotive and gas turbine engines are a significant contributor to climate change. Low-temperature plasma reactors can be used as a particulate trap (electrostatic precipitation) or as a NOx converter (plasma catalysis). 3P Lab explores plasma-catalytic chemistry and electromagnetic discharge behavior – areas that demand fundamental understandings. Low-temperature plasma research can potentially contribute to leaner engine operation with a reduction in NOx and particulate matter, higher pressure engine operation, and more reliable hardware systems.

Flame Stabilization in Ramjet and Scramjet

Supersonic flow
Interaction of supersonic jets

3P Lab investigates flame stabilization in ramjet and scramjet combustors for supersonic air vehicles. At flight speeds beyond Mach 6, air entering the combustor must be supersonic to avoid excessive pressure loss, overheating and dissociation of reactants. At such a high speed, the typical residence time inside the combustor is on the order of few milliseconds. Fuel injection, mixing, and combustion within such a short time is a challenge. Besides shorter chemical timescale, combustion instability poses a major challenge in such propulsive devices. 3P Lab intends to investigate active and passive control of combustion instability in a gas turbine, ramjet, and scramjet using experiments and multi-physics simulations.

Microscale Power Generation and Nanoenergetics

Plasma synthesized metal-coated nanoparticles, courtesy Uwe Kortshagen

The miniaturization of electromechanical devices and the resulting need for a micropower generation with low-weight, long-life devices have provided opportunities for research on nanoenergetic materials. The biggest challenge in microscale-power production is how to sustain combustion at microscale since the length scale is comparable to the quenching distance. A fundamental understanding of flame dynamics on such a small scale is essential to the development of micro-power generators. Nanoenergetic materials offer much higher energy densities and faster energy release rate – attractive for various propulsion and energy-conversion applications. Through experiments and simulations, 3P Lab performs fundamental research on nanofluids and nanoenergetics.

Advanced Optical Diagnostics, Laser Spectroscopy, and Novel Imaging

Two-photon Absorption Laser-Induced Fluorescence of atomic oxygen (O-TALIF) measurements at 4 bar

3P Lab is developing various laser diagnostics, including Laser-Induced Fluorescence (LIF) of OH and CH radicals, Particle Image Velocimetry (PIV), Laser-Induced Incandescence (LII) of soot, Two-photon Absorption LIF (TALIF) of atomic oxygen and hydrogen, Coherent Anti-Stokes Raman Scattering (CARS), absorption spectroscopy, Raman and Thomson scattering, high-speed schlieren and shadowgraph, etc., to reacting and non-reacting environment. Additionally, 3P Lab’s research interest is to develop Laser-Induced Exciplex Fluorescence (LIEF) for time-resolved vapor and liquid phase measurement, X-ray diffraction tomography for high-pressure flow imaging without requiring optical accessibility, kHz PIV-PLIF to explore high-speed transient events, infrared laser diagnostics for species detection, Thomson scattering for low-temperature plasma research. These laser diagnostic techniques are instrumental in understanding complex flow dynamics and energy systems.

Numerical Modeling of Flow, Reaction and Plasma

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Large-eddy simulation of spray using CONVERGE

3P Lab is interested in performing high-fidelity numerical simulations of reacting and non-reacting flows. The Lab uses commercial CFD solvers like CONVERGE, ANSYS, COMSOL and collaborates with other computational groups for Large-Eddy Simulation (LES) and Direct Numerical Simulation (DNS). LES and DNS provide helpful insights in finding local scalar structures and reaction rates to better understand the turbulence-chemistry interactions. The goal of the 3P Lab is to develop a robust mathematical framework and numerical schemes to extend the capability of the current numerical simulation codes to Petascale and future Exascale.

The simulation methods to understand low-temperature plasma physics are continuously evolving with topics such as appropriate treatment of the sheath region, electron production mechanism from non-refractory cathodes still remain a subject of debate. 3P Lab collaborates with modeling groups at National Labs and Universities to broaden the understanding of non-equilibrium regions of the plasma such as sheaths and the arc fringes, collisional–radiative models, interactions between the plasma and electrodes, the coupling of the plasma model to the material property model, etc.

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Low-temperature plasma ignition, courtesy Argonne National Lab