Results 1 to 10 of about 108,268 (221)

Descending Modal Transition Dynamics in a Large Eddy Simulation of a Rotating Detonation Rocket Engine

Energies, 2021
Rotating detonation rocket engines (RDREs) exhibit various unsteady phenomena, including modal transitions, that significantly affect their operation, performance and stability.
Armani Batista, Mathias C. Ross, Christopher Lietz, William A. Hargus   +3 more
doaj   +2 more sources

High-Update-Rate (25 kHz) Laser Ranging with Random Noise Modulation for Fast and Precise Absolute Distance Measurement [PDF]

Sensors
This paper proposes a technique for precise distance measurement under laser random noise using autocorrelation demodulation. We conducted measurements within a 2 m range using a commercial digitizer with a sampling rate of 40 GS/s.
Yongchao Chen, Tianci Liu, Shenggang Liu, Longhuang Tang, Heli Ma, Tianjiong Tao, Xing Jia, Jian Wu, Chengjun Li, Xiang Wang, Zongchen Wang, Weilu Chen, Xirui Zhang, Entao Li, Jia Shi, Jidong Weng   +15 more
doaj   +2 more sources

Nonidealities in Rotating Detonation Engines

Annual Review of Fluid Mechanics, 2022
A rotating detonation engine (RDE) is a realization of pressure-gain combustion, wherein a traveling detonation wave confined in a chamber provides shock-based compression along with chemical heat release.
V. Raman, S. Prakash, M. Gamba
semanticscholar   +1 more source

Low frequency lattice mode dynamics of cyclotrimethylene trinitramine (RDX) crystal studied by femtosecond time-resolved impulsive stimulated Raman scattering

Scientific Reports, 2023
The femtosecond time-resolved impulsive stimulated Raman scattering (fs-ISRS) has been performed to study the low frequency lattice mode dynamics of the RDX crystal.
Guoyang Yu, Yunfei Song, Gangbei Zhu, Zhaoyang Zheng, Qiang Wu, Yanqiang Yang   +5 more
doaj   +1 more source

Experimental validation of rotating detonation for rocket propulsion

Scientific Reports, 2023
Space travel requires high-powered, efficient rocket propulsion systems for controllable launch vehicles and safe planetary entry. Interplanetary travel will rely on energy-dense propellants to produce thrust via combustion as the heat generation process
J. Bennewitz, J. Burr, Blaine Bigler, R. Burke, A. Lemcherfi, T. Mundt, Taha Rezzag, E. Plaehn, Jonathan Sosa, Ian V. Walters, S. Schumaker, K. Ahmed, C. Slabaugh, C. Knowlen, W. Hargus   +14 more
semanticscholar   +1 more source

Multidimensional Parameter Study of Double Detonation Type Ia Supernovae Originating from Thin Helium Shell White Dwarfs [PDF]

Astrophysical Journal, 2021
Despite the importance of Type Ia supernovae (SNe Ia) throughout astronomy, the precise progenitor systems and explosion mechanisms that drive SNe Ia are still unknown.
S. Boos, D. Townsley, K. Shen, S. Caldwell, Broxton J. Miles   +4 more
semanticscholar   +1 more source

All-Fiber Pulse-Train Optical Frequency-Domain Interferometer for Dynamic Absolute Distance Measurements of Vibration

Photonics, 2023
In this paper, we propose an all-fiber co-axial optical frequency-domain interferometer (OFDI) in a pulse-train mode with a sample rate of 9 kHz for measuring the vibrations in an internal structure without any contact.
Heli Ma, Cangli Liu, Long Chen, Longhuang Tang, Tianjiong Tao, Jian Wu, Shenggang Liu, Xing Jia, Chengjun Li, Xiang Wang, Jidong Weng   +10 more
doaj   +1 more source

Stabilized detonation for hypersonic propulsion

Proceedings of the National Academy of Sciences of the United States of America, 2021
Significance There is now an intensifying international effort to develop robust propulsion systems for hypersonic and supersonic flight. Such a system would allow flight through our atmosphere at very high speeds and allow efficient entry and exit from ...
D. Rosato, Mason Thornton, Jonathan Sosa, Christian Bachman, Gabriel B. Goodwin, K. Ahmed   +5 more
semanticscholar   +1 more source

Extinction of incident hydrogen/air detonation in fine water sprays [PDF]

The Physics of Fluids, 2021
Two-dimensional numerical simulations with Eulerian–Lagrangian method are conducted to study propagation and extinction of stoichiometric hydrogen/air detonations in fine water sprays.
Yong Xu, Majie Zhao, Huangwei Zhang
semanticscholar   +1 more source

Experimental research of liquid-fueled continuously rotating detonation chamber

Shock Waves, 2021
Research on the application of liquid fuels to continuously rotating detonation was conducted. A new method of mixture preparation was proposed. A special system of liquid fuel injection was designed and tested which is based on injecting into the ...
P. Wolański, W. Balicki, W. Perkowski, A. Bilar   +3 more
semanticscholar   +1 more source