Exhaust-gas measurements from NASAs HYMETS arc jet.

Miller, Paul Albert

关键词: CARBON DIOXIDE;    CHEMICAL REACTIONS;    JETS;    MATERIALS;    NASA;    NITROGEN;    OXYGEN;    PLANETARY ATMOSPHERES;    SPACE;    STREAMS;    VALIDATION;    WIND TUNNELS;   

DOI  :  10.2172/1002096
RP-ID  :  SAND2010-7747
PID  :  OSTI ID: 1002096
Others  :  TRN: US201104%%141

学科分类：物理（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Arc-jet wind tunnels produce conditions simulating high-altitude hypersonic flight such as occurs upon entry of space craft into planetary atmospheres. They have traditionally been used to study flight in Earth's atmosphere, which consists mostly of nitrogen and oxygen. NASA is presently using arc jets to study entry into Mars' atmosphere, which consists of carbon dioxide and nitrogen. In both cases, a wide variety of chemical reactions take place among the gas constituents and with test articles placed in the flow. In support of those studies, we made measurements using a residual gas analyzer (RGA) that sampled the exhaust stream of a NASA arc jet. The experiments were conducted at the HYMETS arc jet (Hypersonic Materials Environmental Test System) located at the NASA Langley Research Center, Hampton, VA. This report describes our RGA measurements, which are intended to be used for model validation in combination with similar measurements on other systems.