Results 41 to 50 of about 627,886 (336)

Numerical analysis on acoustic coupling of spinning detonation in a square tube

Journal of Thermal Science and Technology, 2016
We investigate spinning detonations propagating in a square tube using numerical simulations based on three-dimensional compressible Euler equations and the two-step-reaction model proposed by Korobeinikov et al. The dynamics of the simulation results is
Yuta SUGIYAMA, Akiko MATSUO
doaj   +1 more source

Influences of thermal physical property parameters on operating characteristics of simulated rotating detonation ramjet fueled by C12H23

AIP Advances, 2022
Two-phase rotating detonation ramjets are considered to be suitable for aerospace applications due to their high thermodynamic cycle efficiency. These engines have an extremely complex internal flow field, in which the liquid fuel undergoes physical and ...
Chenglong Yan, Chen Shu, Jiafeng Zhao, Lingyu Su, Yiheng Tong, Qiaofeng Xie, Wei Lin   +6 more
doaj   +1 more source

Deflagration-to-Detonation Transition in a Semi-Confined Slit Combustor Filled with Nitrogen Diluted Ethylene-Oxygen Mixture

Energies, 2023
The conditions for the mild initiation of the detonation of homogeneous stoichiometric ethylene-oxygen mixtures diluted with nitrogen up to ~40%vol.
Igor O. Shamshin, Vladislav S. Ivanov, Viktor S. Aksenov, Pavel A. Gusev, Sergey M. Frolov   +4 more
doaj   +1 more source

Experimental Investigation of a Cylindrical Air-Breathing Continuous Rotating Detonation Engine with Different Nozzle Throat Diameters

Aerospace, 2022
A continuous detonation engine with various exhaust nozzles, analogous to typical scramjet cavity combustors with variable rear-wall heights, was adopted to perform a succession of cylindrical air-breathing continuous rotating detonation experiments ...
Guangyu Wang, Shijie Liu, Haoyang Peng, Weidong Liu   +3 more
doaj   +1 more source

Early ultraviolet emission in the Type Ia supernova LSQ12gdj: No evidence for ongoing shock interaction [PDF]

, 2014
We present photospheric-phase observations of LSQ12gdj, a slowly-declining, UV-bright Type Ia supernova. Classified well before maximum light, LSQ12gdj has extinction-corrected absolute magnitude $M_B = -19.8$, and pre-maximum spectroscopic evolution ...
Baltay, C., Brown, P. J., Burns, C., Campillay, A., Childress, M., Contreras, C., Ellman, N., Feindt, U., Fraser, M., Gal-Yam, A., Gonzalez, C., Graham, M. L., Hadjiyska, E., Hsiao, E., Inserra, C., Krisciunas, K., Lidman, C., Maguire, K., McKinnon, R., Morrell, N., Nugent, P. E., Parrent, J., Phillips, M. M., Rabinowitz, D., Scalzo, R. A., Schaefer, B., Schmidt, B., Scott, N., Smartt, S. J., Sollerman, J., Stritzinger, M., Sullivan, M., Taddia, F., Taubenberger, S., Tucker, B., Valenti, S., Walker, E. S., Yaron, O., Young, D. R., Yuan, F.   +39 more
core   +6 more sources

Numerical Analysis of the Characteristic Chemical Timescale of a C2H4/O2 Non-Premixed Rotating Detonation Engine

Energies
A three-dimensional numerical investigation using ethylene–oxygen was conducted to examine the characteristics of detonation waves in a non-premixed rotating detonation engine (RDE) across three equivalence ratio conditions: fuel-lean, stoichiometric ...
M. Nejaamtheen, B. Sung, Jeong-Yeol Choi
semanticscholar   +1 more source

Influence of Gaseous Hydrogen Addition on Initiation of Rotating Detonation in Liquid Fuel–Air Mixtures

Energies, 2020
Hydrogen is the most common molecule in the universe. It is an excellent fuel for thermal engines: piston, turbojet, rocket, and, going forward, in thermonuclear power plants. Hydrogen is currently used across a range of industrial applications including
Jan Kindracki, Krzysztof Wacko, Przemysław Woźniak, Stanisław Siatkowski, Łukasz Mężyk   +4 more
doaj   +1 more source

Gamma-Rays as Probes for the Multi-Dimensionality of Type Ia Supernovae [PDF]

, 2001
We present $\gamma $-ray spectra for a set of Type Ia supernovae models. Our study is based on a detailed Monte Carlo transport scheme for both spherical and full 3-D geometries.
Aldering, Ambwani, Burrows, Chan, Clayton, Domı́nguez, Filippenko, Hamuy, Howell, Höflich, Höflich, Höflich, Höflich, Höflich, Iwamoto, Khokhlov, Leibundgut, Lisewski, Nomoto, Nomoto, P Höflich, Perlmutter, Pinto, Riess, Saha, Schmidt, Wang, Wang   +27 more
core   +3 more sources

Numerical and boundary condition effects on the prediction of detonation engine behavior using detailed numerical simulations

Frontiers in Aerospace Engineering, 2023
High-fidelity numerical simulations of an experimental rotating detonation engine with discrete fuel/air injection were conducted. A series of configurations with different feed-plenum pressures but with constant equivalence ratio were studied.
Takuma Sato, Caleb Van Beck, Venkat Raman   +2 more
doaj   +1 more source

Towards an understanding of Type Ia supernovae from a synthesis of theory and observations

, 2013
Motivated by the fact that calibrated light curves of Type Ia supernovae (SNe Ia) have become a major tool to determine the expansion history of the Universe, considerable attention has been given to, both, observations and models of these events over ...
Hillebrandt, W., Kromer, M., Ruiter, A. J., Röpke, F. K.   +3 more
core   +1 more source