Results 61 to 70 of about 412,817 (220)

Absorption of Broadband Low‐Frequency Sound Beyond the Thermodynamics Limit: An Acoustic Resonator With Magnetic Bearing

Advanced Science, Volume 13, Issue 56, 9 October 2026.
This work presents a magnetic‐bearing acoustic resonator that overcomes the thermodynamics limit of sound absorption. By introducing tunable negative stiffness, it achieves broadband low‐frequency absorption within a compact cavity, far exceeding the performance achievable by classic mass‐tuned designs.
Ying Hu, Zhe Zhang, Bohua Huang, Xue Han, Hallam Bastin Kilcoyne, Lixi Huang   +5 more
wiley   +1 more source

Machine Learning in Combustion: Optimization of Fuel Combustion of Rockets

Acceleron Aerospace Journal
Application of Machine Learning (ML) Techniques in research has seen a drastic increase in past few years and the main aspect of it in the rocket propulsion is to understand the combustion process and finding various methos to optimize it. This paper provides an overview of the relationship between machine learning and combustion with a specific focus ...
Nobendu Sen, Janardhan Kamath S, Gautham M Nair, A. Immanuel Selvakumar   +3 more
openaire   +1 more source

Low-Frequency Feed-System-Coupled Combustion Instability in Hybrid Rocket Motors

Journal of Thermal Science and Technology, 2013
The low-frequency unstable combustion of hybrid rocket motors was investigated using the transfer function of the full thermal-combustion-gasdynamic coupled system that was coupled with a liquid oxidizer feed system.
Takakazu MORITA, Saburo YUASA, Koki KITAGAWA, Toru SHIMADA, Shigeru YAMAGUCHI   +4 more
doaj   +1 more source

Boosting Decomposition and Combustion of TKX‐50 and HTPB/TKX‐50 Propellants With NH2‐MIL‐88B(Fe) MOF

Rare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Dihydroxylammonium 5,5′‐bistetrazole‐1,1′‐diolate (TKX‐50) is a promising energetic material that possesses both exceptional energy density and low sensitivity. Nevertheless, its application is hindered by incomplete pyrolysis during combustion or explosion. Various strategies, including eutectic formation, composite preparation, and catalysis,
Jingwen Chen, Yong Kou, Qiangqiang Lu, Hongfeng Ji, Dongqi Liu, Xiaojun Feng, Kun Zhang, Guigao Liu, Wei Jiang, Jun Di, Gazi Hao   +10 more
wiley   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, Volume 43, Issue 7, Page 4475-4514, October 2026.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

AI‐driven discovery of feasible 3D printing configurations for metal alloys

AI Magazine, Volume 47, Issue 3, Fall 2026.
Abstract Configuring additive manufacturing (AM) processes for metal alloys is challenging because printed output quality depends on complex interactions among process parameters such as laser power, scan speed, and feed rate. Conventional trial‐and‐error approaches are inefficient because experiments are costly and the process parameter space is ...
Azza Fadhel, Nathaniel W. Zuckschwerdt, Aryan Deshwal, Susmita Bose, Amit Bandyopadhyay, Jana Doppa   +5 more
wiley   +1 more source

Staged Combustion Cycle Rocket Engine Design Trade-Offs for Future Advanced Passenger Transport [PDF]

, 2012
Staged combustion cycle rocket engines with a moderate nominal 16 MPa chamber pressure have been selected as the baseline propulsion system for the visionary intercontinental passenger transport SpaceLiner. Several technical engine design trade-offs are
Yamashiro, Ryoma, Sippel, Martin
core  

3D printed hybrid rocket fuels with μAl core-shell particles coated with polyvinylidene fluoride and polydopamine: Enhanced combustion characteristics

Defence Technology
3D printing technology enhances the combustion characteristics of hybrid rocket fuels by enabling complex geometries. However, improvements in regression rates and energy properties of monotonous 3D printed fuels have been limited.
Qihang Chen, Xiaolong Fu, Weitao Yang, Suhang Chen, Zhiming Guo, Rui Hu, Huijie Zhang, Lianpeng Cui, Xu Xia   +8 more
doaj   +1 more source

Servo-stabilization of combustion in rocket motors [PDF]

, 1952
This paper shows that the combustion in the rocket motor can be stabilized against any value of time lag in combustion by a feedback servo link from a chamber pressure pickup, through an appropriately designed amplifier, to a control capacitance on the ...
Tsien, H. S.
core  

Thermoacoustic Instabilities in the Rijke Tube: Experiments and Modeling [PDF]

, 2003
Thermoacoustic instability can appear in thermal devices when unsteady heat release is coupled with pressure perturbations. This effect results in excitation of eigen acoustic modes of the system.
Konstantin Matveev, Matveev, Konstantin Ivanovich   +1 more
core   +1 more source