Turbulent spot measurements: wall-pressure and streamwise-velocity correlation.- DNS Study of Flow Mechanism Contributing to Drag Reduction over Distributed Micro Roughness.- Transition Control for Separated Flow over Airfoil by Periodic Body Forcing.- Axial flow influence on boundary-layer transition on rotating slender cones.- Numerical investigations of the nonlinear stages of hypersonic boundary-layer transition for an ogive geometry.- Instability, transition and turbulence on rotating disks and cones - Quo vadis?.- Investigation of Turbulent Wedge Intermittency with Time-Resolved Temperature-Sensitive Paint.- Boundary-layer instability characteristics of supersonic and hypersonic flows over rotating cones.- Interaction of Crossflow Modes with Forward-Facing Steps: Insights Gained from DNS.- Numerical investigations of stability and transition for a blunt swept flat plate at Mach 10.- Numerical and Experimental Investigations of Transition in a Laminar Separation Bubble.- Experimental study on the mechanism of lateral growth of developed turbulent wedge.- Experimental Study of the Instability Amplitude Effect on Critical Step Heights in Crossflow-Dominated Transition.- Flow state transition process and oblique pattern of Taylor–Couette–Poiseuille flow at a medium cylinder ratio.- New perspectives on instability of laminar separation bubbles: have we been missing something important?.- Stability analysis of recirculation bubble flow in a viscoelastic fluid.- Linear and nonlinear response of high-speed boundary layers to continuous stochastic forcing.- Experimental investigation of bluntness effects on transition on a 7-degree blunted cone.- Simulation of K-type and H-type Transition Using the Nonlinear One-Way Navier-Stokes Approach.- Generative machine-learning methods to predict the wake of a distributed roughness patch in a hypersonic boundary-layer flow.- Airfoil trailing-edge tonal noise reduction by roughness elements.- Numerical and experimental study on the freestream-turbulence dependency of turbulent transition processes on a swept flat plate.- Computations of Turbulent Transition in Hypersonic Boundary Layer with Reduced Artificial Dissipation.- Experimental investigation on boundary-layer streaks induced by grid-generated free-stream turbulence.- Global stability analysis of installed jets.- Infrared thermographic evaluation of wall-temperature streak in the free-stream turbulence transition scenario.- Adjoint-Based Approach for Prediction of Non-Modal Growth in Spatially Evolving Flows.- Interscale energy transfer in a transitional swept-wing boundary layer...
Kentaro Kato is Assistant Professor at the Department of Mechanical Systems Engineering, Faculty of Engineering, Shinshu University. After studying mechanical engineering at Keio University, he undertook a PhD program at Technical University of Munich, Germany (2011-2014) under the Erasmus Mundus BEAM project, then earned his PhD in 2017 at Keio University. After a post-doctoral fellowship at the Royal Institute of Technology in Sweden, he has been working at his current position at Shinshu University since 2022. Based on systematic experiments on instabilities and transitions in three-dimensional boundary layers, especially those occurring on rotating bodies, he has proposed a new scaling of instabilities causing transition. From the analysis of quantitative data of the experiments, he is currently continuing his research on the relationship between statistics and eddy structure of the flow, the influence of curvature and rotation on instability and turbulent transition, as well as its physical interpretation.
Ayumu Inasawa is Associate Professor of the Department of Aeronautics and Astronautics, Faculty of System Design, Tokyo Metropolitan University. He received his Ph. D. in 2005 in mechanical engineering at Tohoku University and became a Research Associate at Tokyo Metropolitan University. In 2013, he was promoted to Associate Professor. His research interests include flow instability, boundary-layer transition, aerodynamic sound, thermal fluid dynamics, and flow control. His present research topic is drag reduction by riblets aiming at actual implementation, natural transition in boundary layers, and experimental flow control using distributed surface heating. He has also developed an ultra-low-noise hot-wire anemometer with integrated probe and bridge circuit, for which he received an excellent application award from the Japan Society of Fluid Mechanics in 2020.
Masaharu Matsubara is Professor of Mechanical Systems Engineering at Shinshu University. He studied mechanical engineering at Keio University and received his Ph. D. in 1993. He has worked as a postdoctoral fellow at the Royal Institute of Technology, Sweden (1993-1996) and Tohoku University, Japan (1996-1998), and has been at Shinshu University since 2000. He has been working mainly on experimental studies of boundary-layer transition due to free-stream turbulence, for which he received a best-paper award from the Japan Society of Fluid Mechanics in 2005. His present research topic is the extraction of disturbances using linear response in turbulent shear flows, attempting to quantify the structure and growth of flapping modes in two-dimensional turbulent jets and near-wall streaks in turbulent boundary layers. He has also developed an experimental approach to determining the intermittency rate of transitional channel flows and the large-scale structures that appear therein.
