NDLI: Surface catalysis and oxidation on stagnation point heat flux measurements in high enthalpy arc jets

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Surface catalysis and oxidation on stagnation point heat flux measurements in high enthalpy arc jets

Content Provider	NASA Technical Reports Server (NTRS)
Author	Driver, David M. Nawaz, Anuscheh
Copyright Year	2013
Description	Heat flux sensors are routinely used in arc jet facilities to determine heat transfer rates from plasma plume. The goal of this study is to assess the impact of surface composition changes on these heat flux sensors. Surface compositions can change due to oxidation and material deposition from the arc jet. Systematic surface analyses of the sensors were conducted before and after exposure to plasma. Currently copper is commonly used as surface material. Other surface materials were studied including nickel, constantan gold, platinum and silicon dioxide. The surfaces were exposed to plasma between 0.3 seconds and 3 seconds. Surface changes due to oxidation as well as copper deposition from the arc jets were observed. Results from changes in measured heat flux as a function of surface catalycity is given, along with a first assessment of enthalpy for these measurements. The use of cupric oxide is recommended for future heat flux measurements, due to its consistent surface composition arc jets.
File Size	8101743
Page Count	15
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20130000651
Archival Resource Key	ark:/13960/t8md3xh55
Language	English
Publisher Date	2013-01-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Thermodynamics Gold Calorimeters Enthalpy Stagnation Point Heat Flux Silicon Dioxide Arc Heating Platinum Terrazas-salinas Oxidation Nickel Catalysis Copper Oxides Constantan Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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