Numerical analysis of transonic flow over the FFA-W3-211 wind turbine tip airfoil by M. C. Vitulano, M. C. Vitulano, D. De Tavernier, G. De Stefano, D. von Terzi

“…Then, the threshold between subsonic and supersonic flow is provided, considering also an increase of the Reynolds number (<i>Re</i>) from a characteristic value used in the wind tunnel experiments to the one realistic for large rotors. …”
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METHODS OF REVEALING OF DISCONTINUITY FLAWS AND CONTROL OF THE CAST IRONS STRUCTURE USING BODY AND HEAD WAVES by A. R. Bajev, G. E. Konovalov, A. L. Majorov, M. V. Asadchaja, M. A. Tishchenko

“…The problems of structure-and defectoscopy of cast irons by supersonic method are examined. The new principle schemas of ultrasonic measurings, constructions of acoustic transformers are presented and their analysis is carried out. …”
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In situ dynamic four-dimensional strong-field ionization tomography by Noam Shlomo, Eugene Frumker

“…We present an in situ dynamic four-dimensional (4D=3D space + 1D time) laser induced strong field ionization tomography technique, particularly suited for probing far-from-equilibrium systems, such as supersonic and hypersonic pulsed gas jets. By employing a femtosecond laser, temporal resolution is primarily limited by electronic jitter, typically to a few tens of picoseconds. …”
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Finite-Time Output Robust Control for Restricted Joint Flight Emulator Robotic Arm With Adaptive Tangent Barrier Gains by Isaac Chairez, Alejandra Hernandez-Sanchez, Caridad Mireles, Arthur Mukhamedov, Grigory Bugriy, Stepan Lemak, Viktor Chertopolokhov

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Cold spray technology: future of coating deposition processes by S.B.S. Kalsi, Harminder Singh, T.S. Sidhu

“…Cold spray (CS) belongs to a wide family of thermal spray technology with the difference that it is a solid state process in which spray particles are deposited via supersonic velocity impact at a temperature much below the melting point of the spray material. …”
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Cold spray technology: future of coating deposition processes by Harminder Singh, T.S. Sidhu, S.B.S. Kalsi

“…Cold spray (CS) belongs to a wide family of thermal spray technology with the difference that it is a solid state process in which spray particles are deposited via supersonic velocity impact at a temperature much below the melting point of the spray material. …”
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Analysis of a Low-Angle Annular Expander Nozzle by Kyll Schomberg, John Olsen, Graham Doig

“…The findings show that a low angle of deflection is inherently unable to influence the effective area of an annular supersonic nozzle design.…”
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NUMERICAL SIMULATION OF FLUTTER CHARACTERISTICS IN TRANSONIC FAN BASED ON HARMONIC BALANCE METHOD by ZHANG Xiang, HUANG XiuQuan, ZHANG HengMing, CHEN YuChun

“…Result shows that,an existence of instability risk under unstalled operation at 100%,95% and 90% rotational speed means a supersonic unstalled flutter for the blades. Comprehensive effect aerodynamic work in the downstream of shock wave and near leading edge of blade tip determines aerodynamic stability of blades under different working points.…”
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SC-CFDMA uplink symbol synchronization method based on multi-rate satellite-ground loop by Dan DING, Nai-ping CHENG, Yu-rong LIAO

“…SC-CFDMA(single carrier code and frequency division multiple access) system,whose synchronization is more difficult than that of common orthogonal multi-carrier systems,requires the symbol synchronization to achieve a chip-level precision.Therefore,a synchronization method based on multi-rate satellite-ground loop is proposed.This method extends the closed-loop control on the non-sampling points of the loop through raising the control rates of some loop components,so as to promote the adaptability to users with different speeds.Besides,the state-space equations of the loop and related components are derived.The Matlab simulation results show that,even in GEO satellite system,the synchronization method proposed can adjust the SC-CFDMA uplink symbol timing errors between several supersonic users within chip-level duration,thus providing stable communication.…”
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2022 ALUMINUM ALLOY COLD/HOT-ROLLED SHEETS STRENGTH AND ANISOTROPY ANALYSIS by LIAN LiangChong, JIANG RuiBin, WU Hao

“…2022 alloy has some characteristics of high strength,resistance to damage,can strengthen aging,When used in the next generation of supersonic aircraft skin and armored fighting vehicles and other fields,hot rolled and cold rolled are distinguish due to the different incoming member shapes.After aging treatment,hot-rolled plates tensile and yield strength higher than cold rolled sheet,but its elongation decreased.Under the same kind of rolling state,the perpendicular to the rolling direction of tensile higher than the yield in the rolling direction,but,elongation is reduced.By optical and transmission electron microscopy find hot rolled sheet grain relatively small and recrystallized grains increase than cold rolled sheet.The precipitation of hot-rolled plate small,densely distributed in the aluminum matrix compared to sheet cold-rolled,in macro the reaction to the higher tensile strength and hardness.…”
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Thermoelasticity Coupling Transient Response of Composite-Material Direction Pipe by Jian-lin Zhong, Jie Ren, Da-wei Ma

“…The positive scheme method with second-order accuracy is extended for solving the axisymmetric Euler equations, and the supersonic axisymmetric jet flow over a missile afterbody containing jet exhaust is simulated. …”
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Cold spray technology: future of coating deposition processes by Harminder Singh, T.S. Sidhu, S.B.S. Kalsi

“…Cold spray (CS) belongs to a wide family of thermal spray technology with the difference that it is a solid state process in which spray particles are deposited via supersonic velocity impact at a temperature much below the melting point of the spray material. …”
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Hypersonic Aeroelastic Response of Elastic Boundary Panel Based on a Modified Fourier Series Method by Xiyue Zhou, Lifeng Wang, Jingnong Jiang, Zhu Su

“…Then, the vibrational functions are combined with the supersonic piston theory to establish the aeroelastic equation. …”
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Nonlinear Numerical Simulation for Oscillating Pressure in Cavity and Passive Control Research by Binqi Chen, Yiding Wang

“…According to the comparison of the cavity noise calculation and experimental results under Mach numbers 0.6, 0.85, and 1.35, it indicates that NLAS is capable to predict oscillating pressure of cavity flow from subsonic to supersonic with acceptable deviation. On this basis, the contribution to oscillating pressure suppression made by passive control such as rectangular fence (RF) and square tooth spoiler (STS) is investigated. …”
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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. …”
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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. …”
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Compound electron acceleration at planetary foreshocks by Xiaofei Shi, Anton Artemyev, Vassilis Angelopoulos, Terry Liu, Lynn B. Wilson III

“…Abstract Shock waves, the interface of supersonic and subsonic plasma flows, are the primary region for charged particle acceleration in multiple space plasma systems, including Earth’s bow shock, which is readily accessible for in-situ measurements. …”
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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. …”
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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. …”
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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). …”
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