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Showing 1 to 20 of 22 for “"thermal protection system"”.
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An approximate method of calculating the weight of the two- insulation-two-coolant thermal protection system
… total weight of the two-insulation--two-coolant thermal protection system is developed. The equations derived in the development of the approximate method enable insight into the parameters that control the system weight. Two cases are considered: the case where the outer coolant location is …
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Comprehensive Modeling of Novel Thermal Systems: Investigation of Cascaded Thermoelectrics and Bio-Inspired Thermal Protection Systems Performance
Thermal systems involve multiple components assembled to store or transfer heat for power, cooling, or insulation purpose, and this research focuses on modeling the performance of two novel thermal systems that are capable of functioning in environments subjected to high heat fluxes. The first …
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Assessment of aerocapture-entry trajectories for human Mars exploration
… advantages come at the cost of additional entry system mass. The goal of this research is to identify the parking orbit which minimizes entry system mass and to compare that to the entry system mass for a direct entry. The impact of a higher efficiency propulsion system, a higher entry velocity, …
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Uncertainty quantification applied to the analysis and design of a hypersonic inflatable aerodynamic decelerator for spacecraft reentry
… fluid-structure interaction, and flexible thermal protection system response of a deformable inflatable decelerator. Uncertainty analysis is first applied to the hypersonic flowfield simulations to quantify the uncertainty in the surface convective and radiative heat flux, pressure, and …
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Reducing turbulence- and transition-driven uncertainty in aerothermodynamic heating predictions for blunt-bodied reentry vehicles
… the NASA Orion Multi-Purpose Crew Vehicle (MPCV) thermal protection system during atmospheric reentry from the International Space Station have been studied by direct numerical simulation, with the ultimate goal of reducing aerothermodynamic heating prediction uncertainty. Simulations were …
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Assessment of damage to thermal protection systems due to micrometeoroid and orbital debris impacts
Thermal protection systems for hypersonic vehicles are low- to zero-fault-tolerant. In order to understand the fault tolerance of this system, the number of impacts that cause mission failure due to micro-meteoroid and orbital debris damage is presented. This number differs based on the mission, so …
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Interplanetary mission design with applications to guidance and optimal control of aero-assisted trajectories
… optimal aerogravity-assist tours of the solar system is developed using indirect methods. Two cost functionals are used in the optimization; finding the minimum required maximum lift-to-drag ratio, with and without a convective heating-rate path constraint, and the path which provides the …
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Scale-bridging molecular dynamics simulations of plasma-surface interactions
… plasma facing components in reactor vessels and thermal protection system in re-entry spacecraft. Due to the complex chemistry at the plasma surface boundaries, it is difficulty to either control or predict the effect of plasma on the patterning or erosion of the material. In this dissertation, …
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Development, modeling and testing of a slow-burning solid rocket propulsion system
… are expanding the capabilities of aircraft systems. However, a gap exists in the size and capability of aircraft: no aircraft smaller than 10 kilograms are capable of flight faster than 100 meters per second. A small, fast aircraft requires a propulsion system which is both miniature and …
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Advancing Autonomous Structural Health Monitoring
… impedance-based structural health monitoring system, incorporating wireless based communications, is fabricated and validated with experimental testing. The first steps towards a completely autonomous structural health monitoring sensor are also presented. Power harvesting from ambient energy …
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Nano-scale Heat Transfer in Nanostructures: Toward Understanding and Engineering Thermal Transport
… little progress in understanding the defects–thermal transport property relationship. Using novel numerical techniques and large-scale computations performed on modern supercomputers, I have studied heat transport in nanomaterials containing various defects and mechanical deformations. From …
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Uncertainty Assessment in High-Risk Environments Using Probability, Evidence Theory and Expert Judgment Elicitation
<p>The level of uncertainty in advanced system design is assessed by comparing the results of expert judgment elicitation to probability and evidence theory. This research shows how one type of monotone measure, namely Dempster-Shafer Theory of Evidence can expand the framework of uncertainty to …
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A Computational Thermo-Chemo-Mechanics Framework for the Large-Scale Simulation of Material and Structural Failure in Hypersonic Environments
… heat and mass transfer as well as thermally-activated solid-phase chemical reactions. The framework is verified against two analytical solutions of boundary value problems drawn from thermo-poro-elasticity and thermally-driven delamination. Three-dimensional simulations of a …
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Preliminary design of a high enthalpy plasma tunnel for atmospheric re-entry research
… tunnel at the Center for Hypersonics and Entry Systems Studies (CHESS) at the University of Illinois at Urbana Champaign (UIUC). The centerpiece of the facility is an Inductively Coupled Plasma (ICP) torch capable of recreating flow conditions similar to what reentering spacecraft experience …
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Evaluation Of Space Shuttle Tile Subnominal Bonds
… Earth's atmosphere. Specifically the tile system which is attached to the structure by the means of an RTV adhesive has experienced situations where the bonds are identified as subnominal. The history of these subnominal conditions is presented along with a recent identification of a …
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Development of thermally stable aerogels for aerospace applications
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Alternative Foam Treatments For The Space Shuttle's External Tank
The Space Shuttle Columbia accident and the recent excitement surrounding Discovery's return to space brought excessive media attention to the foam products used on the External Tank (ET). In both cases, videos showed chunks of foam or ablative material falling away from the ET during lift off. …
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Characterization of carbon ablators for hypersonic thermal protection systems
… vehicle's kinetic energy is rapidly converted to thermal energy, generating extreme heat and caustic chemical conditions that rapidly destroy even the most advanced materials. Surviving such an environment depends entirely on the thermal protection system (TPS). Ablative materials, which dissipate …
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Multiscale corrosion of zirconium carbide, carbon, and CF/ZRC under extreme environments
… as oxygen, are a primary mechanism by which most protection system materials degrade during service. This ultimately leads to changes in structure, which in turn alter properties, necessitating a fundamental understanding of ultra-high temperature corrosion processes and consequences to …
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Designing experiments to develop measurements for species catalytic recombination using actinometry and optical emission spectroscopy on silicon carbide
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
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