Results 61 to 70 of about 678 (224)
Nanophotonics, Volume 14, Issue 27, Page 4821-4874, December 2025.Abstract Modern technological evolution witnesses a fast‐paced progress in the design, science, and technology of light‐driven micro/nanomachines in the recent past. These micromachines have found enormous applications as micro/nanoscale manipulators, micromachined space exploration components, nano‐sized cell positioning and control, and micro ...
Rigvendra Kumar Vardhan +2 more
wiley +1 more source
Multiple exhaust nozzles for nuclear rocket engines [PDF]
3rd Annual Meeting, 1965 E. DUKE, D. VANICA
openaire +3 more sources
Performance Analysis of a Kerosene/Gaseous Oxygen Liquid Rocket Engine
Engineering ProceedingsOne of the most widely used rocket propulsion systems that uses liquid propellants is the liquid rocket engine. Due to their high density and specific impulse, liquid fuels and oxidizers are preferred.
Saravanan Ganesan +4 more
doaj +1 more source
AIP Advances, 2022 Solid composite propellants often contain metal particles, such as aluminum particles, and the internal flow field in a solid rocket motor is a typical gas–solid two-phase flow field.
Wei Zhou +4 more
doaj +1 more source
3D‐Printed Architected Material for the Generation of Foam‐Based Protective Equipment
Advanced Engineering Materials, Volume 27, Issue 21, November 2025.This study investigates 3D‐printed architected structures as alternatives to traditional foams in protective gear. It focuses on customizing impact strength and damping through design and manufacturing integration. Testing shows these structures outperform conventional foams, offering enhanced customizability, lower weight, and tunable performance ...
Ali Zolfagharian +5 more
wiley +1 more source
Advanced Engineering Materials, Volume 27, Issue 22, November 2025.Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos +8 more
wiley +1 more source
ChemNanoMat, Volume 11, Issue 11, November 2025.Transition metal carbides (TMCs) have electronic structure similar to that of platinum group metals, making them attractive for thermocatalysis applications. This review explores several essential aspects, discussing physical and chemical properties of TMCs, synthesis methods, and their utilization in thermocatalytic processes, including generation of ...
Edris Madadian +3 more
wiley +1 more source
Effects of Galactic Irradiation on Thermal and Electronic Transport in Tungsten
physica status solidi (b), Volume 262, Issue 11, November 2025.This atomic‐scale study reveals how low‐to‐mid‐energy space irradiation alters tungsten's thermal and electronic behavior, even at low defect levels. Focusing on vacancy sites in bulk and near grain boundaries, it employs two novel approaches: site‐projected thermal conductivity and the N2$^{2}$ method for the thermal and electronic response analysis ...
Chinonso Ugwumadu +2 more
wiley +1 more source
Fundamental Study of Extendible Nozzle and Dual-Bell Nozzle for Reusable Rocket Engine
SPACE TECHNOLOGY JAPAN, THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2003 近い将来の再使用型ロケットエンジンの性能向上の一案として，伸展ノズルやデュアルベルノズルが有望であると考えられている．そこで，これらのノズルの基本特性を把握するために，４種のノズル（標準ノズル，伸展途中の過渡状態を模擬したステップノズル，デュアルベルノズルおよび可動伸展ノズル）を用いて，高空性能燃焼試験を実施した．試験で計測したノズル性能，圧力分布および熱伝達率等のデータをＣＦＤ解析結果と比較検討した．その結果，デュアルベルノズルの性能は標準ノズルやステップノズルよりも低く，現状のノズルコンターはさらに改良の余地があることが判明した．また，可動伸展ノズルの伸展時には，固定ノズルと伸展ノズル隙間からの燃焼ガスの逆流は認められず，ノズル壁面の熱伝達率は過渡的に約20％増加することが判明した ...
Keiichi Hasegawa +8 more
openaire +2 more sources
Can Spacecraft‐Borne Contamination Compromise Our Understanding of Lunar Ice Chemistry?
Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.Abstract Recent detections of water ice in the permanently shadowed regions (PSRs) at the lunar poles have reignited scientific and commercial interest in the exploration of Earth's closest neighbor. The frigid temperatures in PSRs operate as cold traps for volatiles and may represent large reservoirs of materials, including water ice and prebiotic ...
Francisca S. Paiva, Silvio Sinibaldi
wiley +1 more source