High-Order Hybrid WCNS-CPR Scheme for Shock Capturing of Conservation Laws by Jia Guo, Huajun Zhu, Zhen-Guo Yan, Lingyan Tang, Songhe Song

“…By introducing hybrid technique into high-order CPR (correction procedure via reconstruction) scheme, a novel hybrid WCNS-CPR scheme is developed for efficient supersonic simulations. Firstly, a shock detector based on nonlinear weights is used to identify grid cells with high gradients or discontinuities throughout the whole flow field. …”
Get full text

Performance Analysis of a Three-Stream Adaptive Cycle Engine during Throttling by Min Chen, Jiyuan Zhang, Hailong Tang

“…The uninstalled thrust decreases from 100% to 60.36% during the subsonic throttling and to 59.81% during the supersonic throttling. Benefitting from the decreased spillage drag, the installed performance of the three-stream ACE is improved to some degree during throttling. …”
Get full text

Intermittent Flow Regimes in a Transonic Fan Airfoil Cascade by J. Lepicovsky, E. R. McFarland, R. V. Chima, V. R. Capece, J. Hayden

“…These measurements suggest that for an inlet Mach number between 0.9 and 1.0, the flow is bi-stable, randomly switching between subsonic and supersonic flows. Hence, it appears that the change in overall flow conditions in the transonic region is based on the rate of switching between two stable flow states rather than on the continuous increase of the flow velocity.To date, this flow behavior has only been observed in a linear transonic cascade. …”
Get full text

Uncertainty Quantification of GEKO Model Coefficients on Compressible Flows by Yeong-Ki Jung, Kyoungsik Chang, Jae Hyun Bae

“…In the present work, supersonic flows over an axisymmetric base and a 24-deg compression ramp are investigated using the generalized k-ω (GEKO) model implemented in the commercial software, ANSYS FLUENT. …”
Get full text

Designing a Control System for an Airplane Wing Flutter Employing Gas Actuators by A. R. Ansari, A. R. B. Novinzadeh

“…It should be noted that, to justify the application of the aerodynamic theory, we have speculated that the thruster jet ejected through a nozzle with a diameter smaller than several millimeters has a supersonic regime (with Mach number of the order of M≈3.5). …”
Get full text

Nonlinear Dynamics of the High-Speed Rotating Plate by Minghui Yao, Li Ma, Wei Zhang

“…This paper investigates nonlinear dynamic responses of the blade with varying rotating speed in supersonic airflow. The blade is simplified as a pre-twist and presetting cantilever composite plate. …”
Get full text

Shaping Outflows and Jets by Ambient Pressure: A Unified Framework by Willem A. Baan, Tao An

“…While diverse launching mechanisms have been proposed, we demonstrate that these outflows share a fundamental commonality: their morphology follows the physics of pressure-confined supersonic flows. By extending classical de Laval nozzle theory to account for ambient pressure gradients, we present a unified framework that successfully describes outflows from young stellar objects to active galactic nuclei. …”
Get full text

An example of use of gas turbine engine compressor, which has been mastered in production and has good characteristics in a new product project by A. V. Grekhnev

“…The high rates of jet-pipe gas velocity make a turbojet engine with a high-temperature combustor suitable for supersonic cruise products.…”
Get full text

Significance of solar radiation and viscous dissipation on oscillatory and steady convective heat transfer around buoyancy-driven sphere using FDM scheme by Alanoud Alsuhaymi, Musaad S. Aldhabani

“…Thermal radiation is used in the development of nuclear reactors, fire propagation, jet motion, chemical manufacturing, missile engine power, rockets, ships, space exploration, supersonic weapons, and gasoline turbines. The main theme of this examination is to generate the oscillations in heat frequency and oscillations in shear stress rate around a sphere surface. …”
Get full text

On the Formation of Planets in the Milky Way’s Thick Disk by Tim Hallatt, Eve J. Lee

“…One key difference between the two stellar populations is the time at which they emerged: thick-disk stars are the likely product of cosmic noon (redshift z ∼ 2), an era characterized by high star formation rate, massive and dense molecular clouds, and strong supersonic turbulence. Solving for the background radiation field in these early star-forming regions, we demonstrate that protoplanetary disks at cosmic noon experienced radiation fields up to ∼7 orders of magnitude more intense than in solar neighborhood conditions. …”
Get full text

Nonlinear Random Response Analyses of Panels Considering Transverse Shear Deformations under Combined Thermal and Acoustic Loads by Yeong-Nam Kim, Jae-Sang Park, Eun-Soo Go, Min-Hyuk Jeon, In-Gul Kim

“…The panel structures of flight vehicles at supersonic or hypersonic speeds are subjected to combined thermal, acoustic, and aerodynamic loads. …”
Get full text

Experimental Study of Methods of Increasing the Efficiency of a Direct-Flow Air-Jet Detonation Engine by Vitalii Stoliarchuk, Oleksandr Zolotko, Oleksandr Aksonov

“…Detonation is a hydrodynamic wave process of propagation of an exothermic reaction zone in a substance at a supersonic speed. The detonation wave is the main shock wave, behind the front of which a chemical reaction is continuously initiated due to heating during adiabatic compression. …”
Get full text

Impact of reduced sonic boom exposure on introspective judgments and annoyance, pleasantness and loudness ratings for simulated booms presented in a realistic indoor environment by Marmel Frédéric, Cretagne Léo, Thuong Linh-Thao, Coulouvrat François, Fritz Claudia

“…This paper reports on a project that quantified the effects of sonic boom exposure on human responses, in situations representative of the daily life of European citizens, to inform policy, and develop protection concepts for a new generation of supersonic commercial aircraft that should emit a reduced but perceivable boom while flying overland. …”
Get full text

Experimental Investigation of Brazilian 14-X B Hypersonic Scramjet Aerospace Vehicle by João Felipe de Araujo Martos, Israel da Silveira Rêgo, Sergio Nicholas Pachon Laiton, Bruno Coelho Lima, Felipe Jean Costa, Paulo Gilberto de Paula Toro

“…The Brazilian hypersonic scramjet aerospace vehicle 14-X B is a technological demonstrator of a hypersonic airbreathing propulsion system based on the supersonic combustion (scramjet) to be tested in flight into the Earth’s atmosphere at an altitude of 30 km and Mach number 7. …”
Get full text

Extreme Scale Height Variations and Nozzle Shocks in Warped Disks by Nicholas Kaaz, Yoram Lithwick, Matthew Liska, Alexander Tchekhovskoy

“…Whenever the scale height bounces, the vertical velocity becomes supersonic, leading to “nozzle shocks” as gas collides at the scale height minima. …”
Get full text

Neural Network and Hybrid Methods in Aircraft Modeling, Identification, and Control Problems by Gaurav Dhiman, Andrew Yu. Tiumentsev, Yury V. Tiumentsev

“…Namely, on the example of the problem of aircraft longitudinal angular motion, the possibilities of modeling the motion using the NARX network as applied to a supersonic transport aircraft (SST) are first considered. …”
Get full text

Liver Elastography for Liver Fibrosis Stratification: A Comparison of Three Techniques in a Biopsy-Controlled MASLD Cohort by Antonio Liguori, Giorgio Esposto, Maria Elena Ainora, Irene Mignini, Raffaele Borriello, Linda Galasso, Mattia Paratore, Maria Cristina Giustiniani, Laura Riccardi, Matteo Garcovich, Antonio Gasbarrini, Luca Miele, Maria Assunta Zocco

“…<b>Background:</b> The aim of this study was to investigate the accuracy in fibrosis staging of a novel shear wave elastography (SWE) device (S-Shearwave Imaging by Samsung) and a previously validated 2D-SWE by Supersonic Imagine (SSI) in patients with biopsy proven metabolic dysfunction-associated steatotic liver disease (MASLD). …”
Get full text

Misterium znaku krzyża w pierwszych wiekach chrześcijaństwa. Studium historyczno-liturgiczne by Jarosław Superson

Get full text