Hypersonic Vehicle Analyses: The Needs and Challenges of Multidisciplinary Simulations - presented by Prof. Iain Boyd

Hypersonic Vehicle Analyses: The Needs and Challenges of Multidisciplinary Simulations

Prof. Iain Boyd

Prof. Iain Boyd
Slide at 22:19
CENTER FOR NATIONAL Hypersonic SECURITY INITIATIVES Thermal Management Material Response Ablation 0.30 t = 0 ms T__KK 0.05 t = 6 ms 9500 0.0035 0.06 0.25 8500 t = 12 ms 7500 Fluid [K] 3537.5 6875 10212.5 13550 16887.5 0.003 6500 0.04 t = 18 ms 5500 0.20 t = 24 ms 0.0025 Solid (K) 600 1000 1400 1800 2200 2600 4500 0.04 3500 t = 30 ms 2500 0.03 20,002 0.15 1500 500 0.0015 3000 0.02 0.02 0.10 2600 0.001 2200 1800 0.0005 1400 0.05 0.01 1000 600 0.002 x(m) 0.02 0.04 0.06 0.08 x[m] 0.00 -0.05 0.00 0.05 0.10 0.15 0.20 0.25 8.006 -0.004 0.002 0.002 0.004 0.006 0.008 0.01 0.012 Axial Distance [cm] 100 um ZrB w/ 20% SiC on 400 um SiC layer on CC substrate Material Recession Via Surface Chemistry Ultra High Temperature Ceramics Electron Transpiration Cooling 2700 No ETC S-C-Limited ETC (W, =2eV) Qdiff S-C-Limited ETC (W, 3eV) 2500 T-Limited ETC (W, eV) T-Limited ETC (W, eV) Qrad T[K] 2300 Qabl 60.5% 61.0% 11000 84.2% 10000 9000 2100 5.8% 3.5% 8000 7000 6000 5000 1900 1.8% 4000 94.2% 36.0% 35.7% 3000 2000 1700 14.0% 1500 84.4% 31.5% 31.7% -0.5 31.8% 0.8% 1300 Axial position [mm] Non-cat Full-cat Passive Active Normalized position, s/R, Surface energy analysis for SiC Evaluation of net cooling performance University of Colorado Boulder Be Boulder.
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Summary (AI generated)

Once we have the capability to analyze hypersonic flow, there are numerous applications and ways to use these codes to analyze different systems. For example, in the top left corner, we are examining material response in a complex multi-layered material including zirconium diorite, silicon carbide, and carbon carbon substrate. We can study how multi-component materials interact with hypersonic flow.

Additionally, we can explore ablation and different types of materials like ultra-high temperature ceramics for passive thermal management in hypersonic systems. Choosing materials for survivability under various flight conditions is crucial. Active thermal management approaches, such as Electron Transpiration Cooling, can also be investigated. This concept involves certain materials emitting electrons when heated, which may help carry heat away from the vehicle's surface.

There are numerous opportunities to explore different approaches to hypersonic vehicle thermal protection and management using these capabilities.