Results 71 to 80 of about 61,445 (265)

Combined effects of double flat aerodisks and rear opposing jets on hypersonic spiked blunt body drag and heat reduction: An uncertainty and sensitivity analysis

Case Studies in Thermal Engineering
This study numerically investigates the combined effects of double flat aerodisks and rear opposing jets on the drag and heat reduction performance of a hypersonic spiked blunt body. Uncertainty quantification and sensitivity analysis are performed using
Ni He, Yu Pan, Zhenkang Zhang, Jian Chen
doaj   +1 more source

Disintegration and Skipping Dynamics of Bilobate‐Shaped Meteoroids for Generating Ultra‐Long Strewn Fields

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract The longest known Aletai meteorite belt presents a unique phenomenon in meteoroid dynamics. To investigate its formation mechanism, this study introduces a bilobate‐shaped meteoroid model, emphasizing aerodynamic interactions and structure evolution.
Haoyu Li, Ziwen Li, Qingbo Gan, Xiangyuan Zeng   +3 more
wiley   +1 more source

Hypersonic Modes in Nanophononic Semiconductors [PDF]

Physical Review Letters, 2008
Frequency gaps and negative group velocities of hypersonic phonon modes in periodically arranged composite semiconductors are presented. Trends and criteria for phononic gaps are discussed using a variety of atomic-level theoretical approaches. From our calculations, the possibility of achieving semiconductor-based one-dimensional phononic structures ...
Hepplestone, SP, Srivastava, GP
openaire   +3 more sources

Microstructure, mechanical, and thermal properties of compositionally complex (Hf,Zr,Nb,Ti)B2‒LaB6 ceramics

International Journal of Applied Ceramic Technology, Volume 23, Issue 1, February 2026.
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, Lanh Trinh, Zilong Hua, Fei Wang, Xiang Zhang, Yongchul Yoo, Kaustubh Bawane, Yongfeng Lu, Bai Cui   +8 more
wiley   +1 more source

Coupled heat transfer characteristics on gas-solid reacting interface in carbon-oxygen dissociating environment for spacecraft entry flow

Journal of Thermal Science and Technology, 2020
High-enthalpy dissociating aerodynamic environment during high-speed spacecraft entries brings new challenges to the prediction of heat transfer characteristics on the surface of thermal protection system.
Xiaofeng YANG, Yanxia DU, Shenshen LIU, Guangming XIAO, Yewei GUI, Wei LIU   +5 more
doaj   +1 more source

Bayesian probabilistic machine learning analysis of ceramic‐coated ultra‐high‐temperature carbon/carbon composites

International Journal of Applied Ceramic Technology, Volume 23, Issue 1, February 2026.
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

Advances in Micro/Nanofiber‐Based Porous Materials for High‐Performance Thermal Insulation

Advanced Functional Materials, Volume 36, Issue 1, 2 January 2026.
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, Shuo Shi, Jing Yin, Rong Liu, Jianming Chen, Xungai Wang   +5 more
wiley   +1 more source

Flight Control of a Novel Distributed Tiltrotor UAV With Experiments

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
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, Yong Ding, Peng Wang, Jialong Zhang, Lei Ye   +4 more
wiley   +1 more source

Designing phase‐adaptive UHTC multilayer composites: Layer width effects on mechanical and kinetic properties

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract The B1 rocksalt transition metal carbides and nitrides are among the materials with the highest melting temperatures. Additionally, members of this group of materials possess high‐temperature strength with ductility facilitated by diffusional creep.
J. Carter Stotts, Michael Large, Brennan Watkins, Gregory B. Thompson, Christopher R. Weinberger   +4 more
wiley   +1 more source

Investigation of Stability and Control Shortcomings of the North American X-15

Aerospace
There is growing interest in the design of maneuvering high-speed aircraft to fly within or at the edge of the atmosphere. We identify and develop novel quasi-static vehicle screening methodologies, suitable for use during preliminary design, to better ...
William P. Lorenzo, Ramana V. Grandhi, Timothy T. Takahashi   +2 more
doaj   +1 more source