Gas Surface Interactions Lab

September 21, 2021

New paper on radiation!

The P1 approximation to the radiative transfer equation is coupled to a material response code in order to model ablative materials. These types of materials are used as thermal protection systems for atmospheric entry vehicles. Several test cases are presented to verify the implementation and to validate the approach. Representative conditions -- mimicking an arc-jet, a radiant heating facility, and an atmospheric entry trajectory -- are used to demonstrate the validity of the coupled model. The code is then used to replicate an experiment that studies the effects of  the wavelength on the thermal response of charring ablators. Two lasers are used to deliver the heat pulse. The first laser, at a wavelength of 1.07 micron, deposits the energy within the material, as opposed to the 10.6 micron laser, which mostly does it on the surface. The numerical results verify the findings of the experiment, thus confirming the importance of spectrally resolving the radiative heat flux within charring ablators.

Martin, A. and Panesi, M., “Radiative transmission and absorption within the thermal protection system of an atmospheric entry spacecraft,” Journal of Spacecraft and Rockets, 2020.

April 30, 2021

New papers!

Davuluri, R. S. C., Bailey, S. C. C., Tagavi, K. A., and Martin, A., “A drag coefficient model for lagrangian particle dynamics relevant to high-speed flows,” International Journal of Heat and Fluid Flow, vol. 87, 2021, Article 108706.
doi: 10.1016/j.ijheatfluidflow.2020.108706.

Omidy, A. D., Cooper, J. M., Tagavi, K. A., and Martin, A., “VISTA, an open Avcoat material database for material response modeling,” JANNAF Journal of Propulsion and Energetics, vol. 12, no. 1, 2021.

Ho, M., Leclaire, S., Trépanier, J.-Y., Reggio, M., and Martin, A., “Permeability cal- culation of a fibrous thermal insulator using the lattice boltzmann method,” Journal of Thermophysics and Heat Transfer, 2021.
doi: 10.2514/1.T6154.

Cochell, T. J., Unocic, R. R., Grana-Otero, J., and Martin, A., “Nanoscale oxidation behavior of carbon fibers revealed with in situ gas cell stem,” Scripta Materialia, vol. 199, 2020, Article 113820.
doi: 10.1016/j.scriptamat.2021.113820.

Duzel, U., Schroeder, O. M., Zhang, H., and Martin, A., “Numerical simulation of an arc jet test section,” Journal of Thermophysics and Heat Transfer, vol. 34, no. 2, pp. 393–403, 2020.
doi: 10.2514/1.T5722.

Fu, R., Weng, H., Wenk, J. F., and Martin, A., “Thermal expansion for charring ablative materials,” Journal of Thermophysics and Heat Transfer, vol. 34, no. 1, pp. 57– 65, 2020.
doi: 10.2514/1.T5718.

Weng, H., Duzel, U., Fu, R., and Martin, A., “Geometric effects on charring ablator: modeling of the full-scale stardust heat shield,” Journal of Spacecraft and Rockets, vol. 58, no. 2, pp. 302–315, 2020.
doi: 10.2514/1.A34828.

Panerai, F., Cochell, T. J., Martin, A., and White, J. D., “Experimental measurements of the high-temperature oxidation of carbon fibers,” International Journal of Heat and Mass Transfer, vol. 136, pp. 972–986, 2019.
doi: 10.1016/j.ijheatmasstransfer.2019.03.018.

Rostkowski, P., Venturi, S., Omidy, A. D., Weng, H., Martin, A., and Panesi, M., “Calibration and uncertainty quantification of vista ablator material database using bayesian inference,” Journal of Thermophysics and Heat Transfer, vol. 33, no. 2, pp. 356– 369, 2019.
doi: 10.2514/1.T5396.

Zhang, H., Martin, A., and Wang, G., “Numerical analysis of time accuracy of a primitive variable-based formulation of the conservative form of the governing equations for compressible flows,” International Journal of Computational Fluid Dynamics, vol. 33, no. 1-2, pp. 1–9, 2019.
doi: 10.1080/10618562.2018.1549730.

Bailey, S. C. C., Bauer, D., Panerai, F., Splinter, S. C., Danehy, P. M., Hardy, J. M., and Martin, A., “Experimental analysis of spallation particle trajectories in an arc-jet environment,” Experimental Thermal and Fluid Science, vol. 93, pp. 319–325, 2018.
doi: 10.1016/j.expthermflusci.2018.01.005

April 30, 2021

Kristen Price Selected as a NASA Space Technology Graduate Researcher

Kristen Price, a PhD student in GSIL, Selected as a NASA Space Technology Graduate Researcher:

April 30, 2021

Data acquisition on the next Orion flight!

The work of Justin Cooper, a PhD student in GSIL, featured in NASA News: