Radial Evolution of MHD Turbulence Anisotropy in Low Mach Number Solar Wind by Xingyu Zhu, Gary P. Zank, Lingling Zhao, Ashok Silwal

“…We show that, in the wavenumber domain, the power ratio of the observed forward NI/slab and 2D fluctuations is  ∼15 at 0.08 au, while it decreases to  ∼3 at 1 au, suggesting the growing significance of the 2D fluctuations as the turbulence evolves in low Mach number solar wind.…”
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Aeroengine High-Attitude/Low Mach Number Oscillations: Mechanism and Prevention Design by Jiqiang Wang

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Reduced-Order Modeling of Cavity Flow Oscillations across Multi-Mach Numbers Using Deep Learning by Zhe Liu, Fangli Ning, Hui Ding, Qingbo Zhai, Juan Wei

“…Finally, the cavity flow oscillations across multi-Mach numbers are predicted by the POD modes and the future coefficients. …”
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Mach Number Scaling of Foreshock Magnetic Fluctuations at Quasi-parallel Bow Shocks and Their Role in Magnetospheric Driving Throughout the Solar System by Brandon L. Burkholder, Li-Jen Chen, Katariina Nykyri, Norberto Romanelli, Menelaos Sarantos, Dave Sibeck, Jaye Verniero, Gina A. DiBraccio, Daniel Gershman, Martin Lindberg, Erin Kincade

“…The amplitude of magnetic fluctuations depends on the strength of the shock, quantified by the Alfvén Mach number ( M _A ), which is the ratio of solar wind velocity to the local Alfvén velocity. …”
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The Effect of Steady Flow on the Physical Quantities of Slow mMagneto Acoustic Waves in Solar Coronal Plasma by Abbas Abedini

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Gust Load Alleviation with Robust Control for a Flexible Wing by Xiang Liu, Qin Sun

“…In this paper, robust control laws are designed for a large flexible wing with uncertainty in Mach number and dynamic pressure. To accurately describe the aeroelastic model over a large flight envelope, a nonlinear parameter-varying model is developed which is a function of both Mach number and dynamic pressure. …”
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Theoretical Analysis of Isentropic Exponent Effects on the Internal Flow of Supercritical CO2 Centrifugal Compressors by Ben Zhao, Zhiyuan Liu

“…The theoretical analysis reveals that the increasing isentropic exponent mitigates the impeller work coefficient and the impeller outlet Mach number but raises the suction side Mach number of the impeller blade and blade loading at the leading edge. …”
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Turbine Airfoil Optimization Using Quasi-3D Analysis Codes by Sanjay Goel

“…Multiple evaluation criteria based on the Mach number profile obtained from the analysis of each airfoil cross-section are used for computing a quality metric. …”
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Parametric Instabilities in Time-Varying Compressible Linear Flows by Ioannis Kiorpelidis, Nikolaos A. Bakas

“…Two novel parametric instabilities are found: an instability that occurs for periodically wobbling elliptic vortices at a number of discrete oscillation frequencies that are proportional to the Mach number and an instability that occurs for all linear flows at various frequencies of the shear oscillation that depend on the Mach number. …”
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3D Convective Urca Process in a Simmering White Dwarf by Brendan Boyd, Alan Calder, Dean Townsley, Michael Zingale

“…Additionally, the convection is relatively slow (Mach number less than 0.005) and thus a low Mach number method is needed to model the flow over many convective turnovers. …”
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Transonic Turbulence and Density Fluctuations in the Near-Sun Solar Wind by L.-L. Zhao, A. Silwal, X. Zhu, H. Li, G. P. Zank

“…We use in situ measurements from the first 19 encounters of Parker Solar Probe and the most recent five encounters of Solar Orbiter to study the evolution of the turbulent sonic Mach number M _t (the ratio of the amplitude of velocity fluctuations to the sound speed) with radial distance and its relationship to density fluctuations. …”
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Aeroacoustic Attenuation Performance of a Helmholtz Resonator with a Rigid Baffle Implemented in the Presence of a Grazing Flow by Di Guan, Dan Zhao, Zhaoxin Ren

“…., attached to the left sidewall or right sidewall), (4) the grazing mean flow Mu (Mach number), and (5) the neck shape on a noise damping effect. …”
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Design Improvement of a BWB Aerodynamic Performance at Cruise and Take-Off Speeds by Gang Yu, Yuling Duan

“…The CFD calculation and wind tunnel test results show that these improvements make SWB-2 have a good aerodynamic performance at the Mach number of 0.85. Therefore, these design improvements are appropriate and effective for improving the aerodynamic performance of BWB.…”
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Arbitrary Amplitude Dust Acoustic Solitary Waves in a Quantum Dusty Plasma with Arbitrary Dust Size Distribution by Elham Emadi, Neda Pourjafari, Hossein Zahed

“…The result shows that, the allowed Mach number’s range is increased for mono sized dust grains case. …”
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Comparative analysis of flow patterns in off-design planar and conical nozzle by San L. Tolentino, Jorge Mírez

“… This study aims to analyze the behavior of Mach number and pressure field flow patterns in off-design planar and conical nozzles with a divergent half-angle of 10.85°. …”
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Numerical Investigation of Droplet Properties of a Liquid Jet in Supersonic Crossflow by Yu-Qi Wang, Feng Xiao, Sen Lin, Yao-Zhi Zhou

“…The atomization process of a liquid jet in supersonic crossflow with a Mach number of 1.94 was investigated numerically under the Eulerian-Lagrangian scheme. …”
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Flow Analysis of a 300 MW F-Class Heavy-Duty Gas Turbine 1.5 Stage Compressor by Kunhang Li, Bo Song, Suyu Jiang, Jiao Wang, Xiaojun Fan, Jingyin Li

“…Specifically, the distribution of the inlet Mach number, shock wave structures, isentropic Mach number of blade surface, and blade surface separation flow characteristics under three typical working conditions, at the near stall (NS) point, maximum efficiency (ME) point, and near choke point (NC), were discussed. …”
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Performance Analysis of Grid Topologies and RANS Turbulence Models in Predicting Aerodynamic Drag Coefficient at Zero-yaw for an Artillery Projectile by A. Ferfouri, D. D. Jerković, N. Hristov, A. V. Kari, T. Allouche

“…The research is performed for Mach numbers from 0.5 to 3.0, assuming axisymmetric flow. …”
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Wind Tunnel Testing on Start/Unstart Characteristics of Finite Supersonic Biplane Wing by Hiroshi Yamashita, Naoshi Kuratani, Masahito Yonezawa, Toshihiro Ogawa, Hiroki Nagai, Keisuke Asai, Shigeru Obayashi

“…Models A and B started at lower Mach numbers than the Busemann biplane. The characteristics also varied with aspect ratio: model A (1.3<M∞<1.5) started at a lower Mach number than model B (1.6<M∞<1.8) owing to the lower aspect ratio. …”
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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. The 14-X B has been designed at the Prof. …”
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