Characterization of Near Wall Surface Chemistry and Fluid Interaction in Hypersonic Boundary Layers
Abstract
We have demonstrated the importance of the O + N surface reaction for catalytic atom recombination in dissociated nitrogen oxygen mixtures. This was accomplished using numerical and experimental studies in a tube side arm reactor, a microwave discharge to generate atomic nitrogen and an NO titration technique to generate different mixtures of O and N atoms. In the first approach, two photon LIF of atomic oxygen and atomic nitrogen were used to show how the relative atom concentration varied with position along the diffusion tube as a function of O/N ratio at the diffusion tube inlet. The experimental and numerical results confirmed and extended earlier experiments. In the second approach, single photon LIF was used together with isotropically labeled titration gases to detect surface produced NO directly at two different positions in the diffusion tube as a function of O/N ratio at the diffusion tube inlet.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2009
- Accession Number
- ADA501209
Entities
People
- Dusan Pejakovic
- Jochen Marschall
- Lian Duan
- M. Pino Martı́n
Organizations
- Princeton University