Results 31 to 40 of about 3,903 (185)
Traditional carbon materials show limited high‐temperature oxidation resistance, which becomes pronounced above 673 K and significantly restricts their practical applicability. To address this challenge, enhancing polarization loss and leveraging its negative temperature dependence to offset the temperature‐induced increase in conductance loss are ...
Yang Li +9 more
wiley +1 more source
Abstract Novel compositionally complex borides, (Hf,Zr,Nb,Ti)B2 and (Hf,Zr,Nb,Ti)B2‒LaB6, were fabricated using spark plasma sintering process. (Hf,Zr,Nb,Ti)B2‒LaB6 exhibits a dual‐phase microstructure, in which (Hf,Zr,Nb,Ti)B2 is a primary phase with the hexagonal structure and LaB6 is a secondary phase with a cubic structure.
Xin Chen +8 more
wiley +1 more source
The purpose of the SHarp Edge Flight Experiment SHEFEX was the investigation of the aerodynamic behaviour and thermal problems of possible new shapes for future launcher or re-entry vehicles.
Hörschgen, Marcus +4 more
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Technological Step Stones in Support to Future Space Transportation Systems [PDF]
The increasing role of the computational fluid dynamics in the design process of space transportation vehicls is here emphasized. The coupling of CFD with many disciplines is being possible due to the use of modern computational cluster resources and due
Longo, Jose Maria, Hannemann, Klaus
core
Abstract Regulatory agencies and key stakeholders are increasingly promoting the use of probabilistic approaches in design processes for large corporations. This shift is particularly emphasized in analyzing mechanical properties, such as fatigue and failure prediction.
Vahid Daghigh, Hamid Daghigh
wiley +1 more source
The purpose of the Sharp Edge Flight Experiment (SHEFEX) was to investigate the aerodynamic behavior and thermal problems of an unconventional shape for re-entry vehicles comprising multi-facetted surfaces with sharp edges.
Turner, Peter +4 more
core
Advances in Micro/Nanofiber‐Based Porous Materials for High‐Performance Thermal Insulation
Micro/nanofiber porous materials have engendered great interest in the thermal insulation field. Herein, the structural designs, fabrication techniques, and applications of the micro/nanofiber thermal insulation materials are systematically summarized.
Xiaobao Gong +5 more
wiley +1 more source
Aerothermodynamics issues of the DLR hypersonic flight experiment SHEFEX-I
Here is presented an overview of the hypersonic experiment on sharp edge concepts, SHEFEX-I. The project, being performed under responsibility of the German Aerospace Center (DLR), is aimed to investigate the behavior and the possibilities of an improved
Eggers, Thino +2 more
core
Flight Control of a Novel Distributed Tiltrotor UAV With Experiments
Considering the mode transition control of a novel distributed tiltrotor UAV, we designed a fast fixed‐time sliding mode attitude controller to improve the response speed and robustness of the control system. Furthermore, a smooth mode transition strategy is developed to guarantee the stable conversion between fixed‐wing and helicopter modes ...
Li Yu +4 more
wiley +1 more source
Designing Flight Experiments for Hypersonic Flow Physics
A major problem of concen for the success of physical-modelling resides in the availability of experimental data for model validation, particularly in the hot hypersonic regime.
Gülhan, A. +4 more
core

