Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Volume 67, Number 9
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session FF1: Inductively Coupled Plasmas
8:00 AM–9:00 AM,
Friday, October 7, 2022
Sendai International Center
Room: Shirakashi 1
Chair: Mate Vass, Ruhr University Bochum, Germany
Abstract: FF1.00004 : An introduction to the role of chemical models in the enthalpy rebuilding procedure of Inductively Coupled Plasma facilities*
8:45 AM–9:00 AM
Presenter:
Enrico Anfuso
(Vrije Universiteit Brussel & von Karman Institute)
Authors:
Enrico Anfuso
(Vrije Universiteit Brussel & von Karman Institute)
Andrea Fagnani
(Vrije Universiteit Brussel & von Karman Institute)
Olivier Chazot
(von Karman Institute for Fluid Dynamics)
The VKI’s Plasmatron rebuilding is based on heat flux measurement and two CFD codes that compute the numerical counterpart. One simulates the plasma jet in the Plasmatron chamber under the LTE assumption, the other the boundary layer region around the testing sample under chemical non-equilibrium conditions. The rebuilding process iterates on a thermodynamic variable (e.g., the temperature) until numerical and experimental quantities match inferring the quantity of interest. This work focuses on the role played by the chemical models used to describe the chemical non-equilibrium in the boundary layer. Chemical models, such as Park’s or Gupta’s, provide the coefficients that model the formation/deprecation of the species which significantly impacts the heat flux computation. Such coefficients are affected by large inaccuracies being calibrated more than 20 years ago and validated with experimental data available at that time. A forward uncertainty propagation technique and a sensitivity analysis will provide insight about the role of the chemical. Results will be applied to one test case of the Plasmatron facility.
*The research of E. Anfuso is supported by a doctoral fellowship awarded from the Research Foundation Flanders (FWO, dossier #1SF8822N)
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