OFF-Stagnation point testing in plasma facility

Viladegut, Alan; Chazot, Olivier

doi:10.1051/eucass/201507113

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…We want to apply a similar procedure carried out by CERBOULA but with a flat plate calorimeter installed at off-stagnation point configuration and in combination with a 2D CFD solver. Obtaining a recombination coeffient distribution along the wall will contribute on the development of flight extrapolation techniques at off-stagnation point, 22 which is required for future missions definition.…”

Section: Discussionmentioning

confidence: 99%

Enthalpy Characterization and Assessment of Copper Catalysis Determination in Inductively Coupled Plasma Facility

Viladegut

2015

45th AIAA Thermophysics Conference

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Spacecrafts re-entering the atmosphere at hypersonic regimes consider the wall catalytic activity on their design phase. Therefore, accurate catalytic models are required to maximize mission efficiency. In order to develope and validate an experimental approach for a catalytic model in the VKI-Plasmatron facility, a good enthalpy characterization of the freestream plasma flow is required. A method to rebuild the boundary layer outer edge properties based on calorimetric measurements is described and consolidated in this paper. The technique requires the prior determination of the wall catalytic conditions on a reference material (γ ref ), so a method called Mini-Max is applied under different facility conditions and a reference catalysis onCu of γ ref = 0.0265 ± 26.42% at 50mbar and γ ref = 0.0156 ± 40.81% at 100mbar is obtained. Additional tests in different probe geometries suggest that the boundary layer characteristics affect the determination of the recombination coefficient, which is important for the future development of flight extrapolation techniques of wall boundary conditions.

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Section: Discussionmentioning

confidence: 99%

Enthalpy Characterization and Assessment of Copper Catalysis Determination in Inductively Coupled Plasma Facility

Viladegut

2015

45th AIAA Thermophysics Conference

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“…В Институте фон Кармана разработана модель в форме пластины со скругленными кромками [13]. На боковой поверхности модели, в прямоугольном гнезде, устанавливаются восемь медных датчиков теплового потока, работающих по принципу стационарного водоохлаждаемого калориметра, в этом же гнезде может быть размещен исследуемый образец материала (рис.…”

Section: определение тепловых потоков к высококаталитической медной пunclassified

“…Датчики соединены в контуре охлаждения последовательно, что накладывает ограничения на максимальный уровень тепловых потоков, которые могут измеряться, в связи с риском закипания воды в калориметре. В [13] приводятся данные измерений калориметром тепловых потоков вплоть до 42 Вт/см 2 .…”

Section: определение тепловых потоков к высококаталитической медной пunclassified

Experimental study of heat transfer between dissociated air flow and a flat plate at angle of attack in RF-plasmatron

Гордеев¹,

Чаплыгин²

2019

PhChGD

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The heat transfer from subsonic jets of dissociated air flowing from a slit nozzle to the surface of a flat plate at angle of attack was experimentally studied by the RF-plasmatron IPG-4. The influence of pressure in the chamber of plasmatron on the range of the air plasma jet was studied. The influence of generator power on distribution of heat flux on the surface of copper plate at the angle of attack at pressures in the chamber of 50 and 100 hPa was studied. The heat fluxes for the low-catalytic surface of the heat-shielding tile of the «Buran» orbital vehicle were determined depending on the generator power, pressure in the chamber and angle of attack. A comparison of the heat exchange parameters for the copper surface and the low catalytic surface of the heat-shielding tile of the «Buran» orbital vehicle for the same flow regime was carried out.

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“…5.5 according to a reference flat plate model of 20 cm. This reference length is taken because it is representative of the flat plate model mentioned above, which has been extensively used in the VKI-Plasmatron [11,106,108,109,112].…”

Section: Scale Effectmentioning

confidence: 99%

“…4.11. This configuration has already been tested[105,106] for the validation of a boundary layer extrapolation methodology at off-stagnation point. Tests show that the operating envelope for this configuration is smaller compared to the stagnant configuration.…”

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confidence: 99%

Assessment of gas-surface interaction modelling for lifting body re-entry flight design

Farran¹

2018

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My wish is that the reader enjoys this dissertation and that it brings him/her a better understanding on Gas-Surface Interaction (GSI) phenomena. Nonetheless, this journey through the VKI doctoral program has been long, and I wouldn't be able to address this topic without acknowledging people that were by my side during this research, because without them this thesis would not have been possible: A big thank to Olivier Chazot for giving me the opportunity to develop my thesis in the Plasmatron facility. His office was always open and ready for discussion. A special mention to his telephone, most of the time ringing during each one of our conversations. Also to Roberto Flores, director of this thesis in UPC, who allowed me to keep in contact with my university. Following the experimental nature of this dissertation, I would like to mention also the contribution made by Pascal Collin. He did an excelent job running the Plasmatron and installing the probes. I will always remember his desperation when water leaks appear when making the vacuum in the chamber. I thank also the rest of the Plasmatron team: Bernd Helber and Damien Le Quang as radiation experts, and Işil Şakraker as advisor for calorimetric measurements. Many CFD simulations appear in this dissertaion. For that, the advice of Vincent Van Der Haegen, my office mate, has been extremely useful to achieve a converged solution. Also, the flight extrapolation technique developed here deserves my gratitude to Fabio Pinna, whose expertise in CFD helped me to improve my IXV simulations and achieve the "Pinna Certification". I really enjoyed working with them. Other VKI colleagues I want to mention are Alessandro Turchi, who helped me understand many aspects of GSI phenomena, Francesco Panerai who set the basis to develop this dissertation, and Georgios Bellas-Chatzigeordis to whom I encourage to continue with the catalytic model development and implementation in VKI numerical tools. Last but not least, special thanks to my family. They encouraged me to pursue a doctorate degree and supported me in the most difficult moments.

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OFF-Stagnation point testing in plasma facility

Cited by 9 publications

References 3 publications

Enthalpy Characterization and Assessment of Copper Catalysis Determination in Inductively Coupled Plasma Facility

Enthalpy Characterization and Assessment of Copper Catalysis Determination in Inductively Coupled Plasma Facility

Experimental study of heat transfer between dissociated air flow and a flat plate at angle of attack in RF-plasmatron

Assessment of gas-surface interaction modelling for lifting body re-entry flight design

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