The data set is related to a two-dimensional and stationary magneto-hydrodynamic model of a plasma spray torch operated with argon, which is developed to predict the plasma properties in a steady operating mode. The model couples a submodel of a refractory cathode and its non-equilibrium boundary layer to a submodel of the plasma in local thermodynamic equilibrium in a self-consistent manner. The Navier-Stokes equations for a laminar and compressible flow are solved in terms of low- and high-Mach number numerical approaches. The results show that the Mach number can reach values close to one. Simulations are performed for electric currents of 600 A and 800 A, and gas flow rates of 40, 60, and 80 NLPM. The plasma parameters obtained by the two approaches differ and the differences become more pronounced for higher currents and gas flow rates. The arc voltage, the electric power, and the thermal efficiency from both the low-and high-Mach number models of the plasma agree well with experimental findings for a current of 600 A and a flow rate of 40 NLPM. For higher currents and gas flow rates, the results of the low- and high-Mach number models gradually differ and underline the greater appropriateness of the high-Mach number model.

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Release Date | 2021-09-21 |

Identifier | b57b0698-5708-4a04-b264-c27f16186f7c |

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Plasma Source Properties | The plasma spray torch considered in the present study is the commercial device Oerlikon Metco F4MB-XL. This is characterized by a single-cathode and a single-anode arrangement. The WL10 cathode by Plansee is made of lantanated tungsten and sticks to a copper holder. The nozzle is cylindrically symmetric and serves as anode. Its cylindrical fragment is partly made of tungsten. The cathode base and the nozzle are water cooled. The gas is fed between the cathode and the anode. |

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Plasma Medium Properties | The core plasma is considered to be in the state of Local Thermodynamic Equilibrium. |

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Language | English |

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Public Access Level | Public |

Contact Name | Margarita Baeva |

Contact Email |

#### Data and Resources

- Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 2: Recorded operation conditions of the plasma spray torch.csv
The operating conditions (power, voltage, current, and flow rate) are...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 5a: The transfer function q_c (T_w,U) .csv
The heat flux to the cathode for W-La cathode as a function of the surface...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 5b: The transfer functions j_w,c (T_w,U). csv
Normal current density at the cathode as a function of the surface...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 6: Voltage drop in the cathode boundary layer as a function of the arc current.csv
The predicted voltage drop in the cathode boundary layer for current between...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 7a: Distribution of the temperature T_w on the cathode surface for arc currents of 300 A, 600 A, and 800 A.csv
The temperature is computed from the heat and current transfer in the...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 7b: Distribution of the normal current density j_w,c along the cathode surface.csv
The current density is computed from the heat and current transfer in the...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 7c: Distribution of the electron temperature on the edge between the cathode boundary layer and the LTE plasma.csv
The electron temperature in the cathode boundary layer results from the...

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 8 (down_part): The temperature field from the low-Mach-number model. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 9 (down_part): The velocity field from the low-Mach-number model. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 9 (upper_part): The velocity field from the high-Mach-number model. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 10 (down_part): The current density from the low-Mach-number model. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 10 (upper_part): The current density from the high-Mach-number model. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 12a: Axial distribution of the flow velocity from different models. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 12b: Axial distribution of the speed of sound from different models. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 12c: Axial distribution of the Ma number from different models. csv
Current 600 A, gas flow rate of argon 40 NLPM.

Preview Download - Self-consistent Cathode-Plasma Coupling and Role of the Fluid Flow Approach in Torch Modelling - Figure 16: Arc voltage values obtained in experiments and modelling.csv
Gas flow rate: 40, 60, 80 NLPM.

Preview Download

Electric current 600, 800 A.