In this paper, the behavior of plenum pressure behind a transpiration-cooled porous material sample after an incident surface heat flux to is analyzed in experiment and theory. Two materials, zirconium diboride carbon/carbon, were characterized using pressure-based noninteger system identification method. The resulting impulse responses are based on two numerical models. One model calculates re...

The present work aims to investigate the geometrical parameters of graphite die on energy consumption needed for sintering a ZrB2 sample. Maxwell and electrical charge conservation equations are solved obtain potential current system. governing discretized by Galerkin method using finite element method. electric distribution is obtained at each geometry temperature contours obtained. results sh...

This paper presents a numerical model that assesses the effect of applying transpiration cooling to both outer wall and substructure high-speed flight vehicle. The porous impulse response analysis for evaluation (PIRATE) code has been extended validated account quasi-two-dimensional lateral heat conduction effects, thereby allowing more complex geometries. enables very fast calculations two-dim...

Porous ultra-high-temperature ceramics (UHTCs) are a candidate group of materials for transpiration cooling hypersonic vehicles due to their exceptionally high melting point, typically above 3000 K. Their operating temperature permits higher amount radiative than that achievable with conventional materials, which reduces the required coolant mass flow rate cool surface. This work experimentally...

An approach to producing hierarchical multi-scale porous ultra-high temperature ceramics (zirconium diboride, ZrB2) using 3D printing has been developed. Porous ceramic filaments can be printed via Direct Ink Writing (DIW) (paste extrusion). Millimeter scale porosity is created by the scaffold filaments. We introduce 20-micron-scale into with addition of oil produce capillary suspension paste i...