Kent State University · School of Engineering
Hahn Lab
The Hahn Lab investigates unsteady compressible and reacting flow physics, studies the effects of active and passive flow control, and develops experimental diagnostics and reduced-order models.
Research
Unsteady Aerodynamics
Shock system dynamics, flow separation, and shock-combustion coupling.
Flow Control
Active and passive manipulation of shock systems, boundary layers, and reacting flows.
Optical Diagnostics
Schlieren methods, mid-infrared imaging, and event-based sensors for quantitative 2D measurements.
Modeling and Computation
Physics-based and reduced-order models for prediction, interpretation, and control.
Selected Publications
L. C. Hahn, P. A. Lax, J. D. Szczudlak, S. B. Leonov, and S. C. Morris. (2026). Unsteady pseudoshock interaction with fully passive bleed slots. Aerospace Science and Technology, 177, 112261. https://doi.org/10.1016/j.ast.2026.112261.
L. C. Hahn, P. A. Lax, S. C. Morris, S. B. Leonov, T. M. Ombrello, E. L. Braun, and B. J. McGann. (2026). Control of shock train structure in isolator by electrical discharge. AIAA Journal, 64, (5), 2457–2469. https://doi.org/10.2514/1.J065811.
L. C. Hahn, P. A. Lax, S. C. Morris, and S. B. Leonov. (2024). Interaction of the shock train leading edge and filamentary plasma in a supersonic duct. Fluids, 9, (12), 291. https://doi.org/10.3390/fluids9120291.