A5036897167- Magnetic confinement fusion research
- Fusion materials and technologies
- Fluid Dynamics and Turbulent Flows
- Metallurgical Processes and Thermodynamics
- Laser-Plasma Interactions and Diagnostics
- Flow Measurement and Analysis
- Nuclear Materials and Properties
- Electrical and Bioimpedance Tomography
- Superconducting Materials and Applications
- Laser-induced spectroscopy and plasma
- Fluid Dynamics and Thin Films
- Nuclear Engineering Thermal-Hydraulics
- Ionosphere and magnetosphere dynamics
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Mixing
- Plasma and Flow Control in Aerodynamics
- Fluid Dynamics and Heat Transfer
Princeton University
2017-2023
Rensselaer Polytechnic Institute
2015
In this paper, hydraulic jump control using electromagnetic force in a liquid metal flow is presented. The methods used give insight into the behavior presence of magnetic fields and electrical currents. Flowing metals proposed solution to heat flux challenges posed fusion reactors, specifically tokamak. Unfortunately, thin, fast-flowing divertor concepts for reactors are susceptible jumps that drastically reduce speed, leading potential problems such as excessive evaporation, unsteady power...
A new, novel approach to liquid metal plasma facing components called "divertorlets" is presented and accompanied by experiments, simulations, analysis. The development of a robust reliable component at the divertor ongoing, with concepts gaining interest showing promise for being able handle higher heat fluxes as well improve performance through reduction in particle recycling. design this work seeks address challenges associated evaporation, operation power, inventory. Divertorlets utilize...
Abstract The ‘divertorlets’ concept is a potential non-evaporative liquid metal solution for heat removal at low recycling regime. A toroidal divertorlets prototype was built and tested in LMX-U Princeton Plasma Physics Laboratory to evaluate the performance of this configuration. In paper, details design, experimental results, comparison with analytical theory MHD numerical simulations are covered. Experiments, model showed agreement allowed projection operation properties higher magnetic...
Plasma-facing components (PFC's) made from solid materials may not be able to withstand the large heat and particle fluxes that will produced within next-generation fusion reactors. To address shortcomings of PFC's, a variety liquid-metal (LM) PFC concepts have been proposed. Many suggested LM-PFC designs rely on electromagnetic restraint (Lorentz force) keep free-surface, flows adhered interior surfaces reactor. However, there is very little, if any, experimental data demonstrating LM-PFC's...
Measuring free-surface, liquid-metal flow velocity is challenging to do in a reliable and accurate manner. This paper presents non-invasive, easily calibrated method of measuring the surface velocities open-channel flows using an IR camera. Unlike other spatially limited methods, this camera particle tracking technique provides full field-of-view data that can be used better understand determine boundary conditions. could implemented automated for wide range experiments, even if they operate...
Abstract Divertor systems of fusion devices are exposed to intense heat loads from plasmas, which degrade solid plasma-facing components. Fast liquid metal (LM) flow divertors may be more advantageous for this purpose but have risk piling due magnetohydrodynamic (MHD) drag. However, severe deceleration the could countered with injection currents that transverse external magnetic fields, allowing thrust <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow>...
The behavior of free-surface, liquid-metal flows exposed to both magnetic fields and an injected electric current is investigated via experiment numerical simulations. purpose this paper ...
A 'weighted magnetic bearing' has been developed to improve the performance of rotating Lorentz-force flowmeters (RLFFs). Experiments have shown that new bearing reduces frictional losses within a double-sided, disc-style RLFF negligible levels. Operating such an under 'frictionless' conditions provides two major benefits. First, steady-state velocity magnets matches average flowing liquid at low flow rates. This enables make accurate volumetric measurements without any calibration or prior...
Experiments and predictions of surface wave damping in liquid metal due to a aligned magnetic field externally regulated j × B force are presented. Fast-flowing, liquid-metal plasma facing components (LM-PFCs) proposed alternative solid PFCs that unable handle the high heat flux, thermal stresses, radiation damage tokamak. The significant technical challenges associated with LM-PFCs compared justified by greater flux management, self-healing properties, reduced particle recycling. However,...
Rotating Lorentz-force flowmeters are a novel and useful technology with range of applications in variety different industries. However, calibrating these can be challenging, time-consuming, expensive. In this paper, simple calibration procedures for rotating presented. These eliminate the need expensive equipment, numerical modeling, redundant flowmeters, system down-time. The processes explained step-by-step manner compared to experimental results.
Liquid metal (LM) plasma-facing components (PFCs) (LM-PFCs) within next-generation fusion reactors are expected to enhance plasma confinement, facilitate tritium breeding, improve reactor thermal efficiency, and withstand large heat particle fluxes better than solid made from tungsten, molybdenum, or graphite. Some LM divertor concepts intended for long-pulse operation at >20 MW/m2 incorporate thin (~1 cm), fast-moving (~5 10 m/s), free-surface flows. Such systems will require a range of...