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Investigation of gas seeding for planar laser-induced fluorescence in hypersonic boundary layers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johansen, C. T. Danehy, P. M. Arisman, C. J. Bathel, B. F. |
| Copyright Year | 2015 |
| Description | Numerical simulations of the gas-seeding strategies required for planar laser-induced fluorescence in a Mach 10 (approximately Mach 8.2 postshock) airflow were performed. The work was performed to understand and quantify the adverse effects associated with gas seeding and to assess various types of seed gas that could potentially be used in future experiments. In prior experiments, NO and NO2 were injected through a slot near the leading edge of a flatplate wedge model used in NASA Langley Research Center's 31 in. Mach 10 air tunnel facility. In this paper, nitric oxide, krypton, and iodine gases were simulated at various injection rates. Simulations showing the deflection of the velocity boundary layer for each of the cases are presented. Streamwise distributions of velocity and concentration boundary-layer thicknesses, as well as vertical distributions of velocity, temperature, and mass distributions, are presented for each of the cases. A comparison between simulated streamwise velocity profiles and experimentally obtained molecular tagging velocimetry profiles using a nitric oxide seeding strategy is performed to verify the influence of such a strategy on the boundary layer. The relative merits of the different seeding strategies are discussed. The results from a custom solver based on OpenFOAM version 2.2.1 are compared against results obtained from ANSYS® Fluent version 6.3. |
| File Size | 5677307 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20160003625 |
| Archival Resource Key | ark:/13960/t7pp43p9w |
| Language | English |
| Publisher Date | 2015-07-22 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Aerodynamics Temperature Distribution Air Flow Hypersonic Speed Nitric Oxide Laser Induced Fluorescence Velocity Distribution Krypton Hypersonic Boundary Layer Wedges Leading Edges Boundary Layers Iodine Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
