Results 101 to 110 of about 3,583 (262)

Research on the Characteristics of Oscillation Combustion Pulsation in Swirl Combustor

This study focuses on the center-staged swirl model combustion chamber, conducting experiments and numerical simulations to investigate the unstable combustion characteristics of diffusion flames under different Reynolds numbers and air–fuel ratios.
Chen Yang, Xiang Zhang, Yong Liu, Chongyang Liu, Xinkun Ge   +4 more
core   +1 more source

Simulation aux Grandes Echelles d'un statoréacteur [PDF]

, 2009
La conception d'un statoréacteur bénificie aujourd'hui des progrès divers des outils numériques permettant par la même occasion d'alléger les différentes étapes préliminaires de tests en géométrie réelle nécessaires au développement de telle ...
Roux, Anthony
core  

Detection method of combustion oscillation characteristics under strong noise background

, 2020
After the lean fuel premixed combustion technology is applied to aero engines, severe combustion oscillations will be cased and led to hidden safety hazards such as engine vibration, further energy waste and other problems.
Tianhong Zhang, Yan Zhang, Zhonglin Lin, Qi Xie, Yunkun Wei   +4 more
core   +1 more source

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

Journal of Field Robotics, EarlyView.
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

Combustion oscillation control [PDF]

, 1996
Premixing of fuel and air can avoid high temperatures which produce thermal NOx, but oscillating combustion must be eliminated. Combustion oscillations can also occur in Integrated Gasification Combined Cycle turbines.
Richards, G. A., Janus, M. C.
core  

Linear System Identification and Control of a Low‐Cost High‐Performance Omnidirectional Marine Surface Vehicle for Swarming Applications

Journal of Field Robotics, EarlyView.
ABSTRACT Marine operations traditionally rely on human intervention, a costly and disruptive method. Autonomous surface vehicles (ASVs) offer a powerful alternative, capable of operating autonomously, for extended periods, and with various sensors for various missions.
Ayman El Qemmah, Gianni Cario, Alessandro Casavola, Marco Lupia, Francesco Tedesco   +4 more
wiley   +1 more source

Numerical investigation on the engraving process of a pyrotechnic actuator with an improved two-phase flow model of interior ballistic

Defence Technology
By combining with an improved model on engraving process, a two-phase flow interior ballistic model has been proposed to accurately predict the flow and energy conversion behaviors of pyrotechnic actuators.
Yue Li, Cong Liu, Cheng Cheng, Genghui Jiang   +3 more
doaj   +1 more source

Experiment investigation of the effects of hydrogen content on the combustion instability of methane/hydrogen lean premixed swirl flames under different acoustic frequency ranges

AIP Advances, 2019
Experimental study on combustion instability of lean premixed swirl flame was conducted for methane-hydrogen mixtures, and the influence mechanism of hydrogen content (0%, 10%, 20%, and 40%) on the combustion instability under different acoustic ...
Mingxiao Wang, Yingjie Zhong, Kai Deng
doaj   +1 more source

Exploiting Device Deformability for Fluid and Particle Manipulation

Small, EarlyView.
Deformable devices enable fluid and particle manipulation modes that are inaccessible to rigid platforms. This review examines soft materials and architectures that translate controlled deformation into microscale fluid operations such as pumping, valving, mixing, and particle handling.
Zhiyang Hong, Xiaoyue Kang, Dan Yuan, Nam‐Trung Nguyen, Jun Zhang   +4 more
wiley   +1 more source

A numerical analysis of aluminum droplet combustion driven instabilities in solid rocket motors

, 2017
International audienceAcoustic coupling with unsteady aluminum particle combustion may lead to self-sustained instabilities with large oscillation amplitudes in a solid rocket motor.
Gallier, Stany, Genot, Aurelien, Schuller, Thierry   +2 more
core   +1 more source