Sinan Eyi

E-mail

seyi@metu.edu.tr

Department

Department of Aerospace Engineering

ORCID

0000-0002-7380-0733

Scopus Author ID

6603288394

Investigation of Ignition Overpressure Over a Launch Pad using Open-Source CFD Solvers Danışan, Ercan Umut; Iriolya, Tohid Ghorbani; Duru, Murat Özüm; Gündem, Doğukan; Eyi, Sinan (2026-01-01) During rocket ignition and liftoff, strong transient pressure waves propagate within the launch pad environment and impinge on the launch vehicle, flame deflector and surrounding structures. Controlling pressure waves play...
Numerical Investigation of Water Injection Effects on Jet Centerline Temperature and Ignition Overpressure by Using OpenFOAM Irirolya, Tohid Ghorbani; Eyi, Sinan; Tsutsumi, Seiji (2026-01-01) Analyzing and correctly designing of the launch environment is necessary for haveing a safe and successful launch. During launch, two kinds of pressure waves appear: (1) ignition overpressure (IOP) waves and (2) acoustic w...
Mitigation of Ignition Overpressure in Launch Pads via Unsteady Adjoint-Based Optimization Danışan, Ercan Umut; Eyi, Sinan (2026-01-01) The solid rocket boosters (SRBs) of space launch vehicles generate powerful Ignition Overpressure (IOP) waves during the early stages of lift-off. These IOP waves propagate through launch environment and are reflected back...
Numerical Analysis of Pressure Wave Propagation at Rocket Launch Pads Using Open-Source CFD Solvers Gündem, Doğukan; Iriolya, Tohid Ghorbani; Danışan, Ercan Umut; Ç Etin, Esra Buse; Atılkan, Yavuz; Eyi, Sinan (2026-01-01) Ignition overpressure (IOP) waves are generated during ignition of the rocket. IOP is a transient phenomenon that occurs as a sudden burst of exhaust gases during lift-off. This wave has a high pressure magnitude and a rel...
Numerical Analysis of a Flame Deflector Using Reactive an Non-Reactive Flow Models Irirolya, Tohid Ghorbani; Eyi, Sinan; Tsutsumi, Seiji (2026-01-01) During the ignition of solid and liquid rocket motors, ignition overpressure (IOP) wave is generated. The IOP is caused by the rapid expansion of exhaust gases, which compress the surrounding air and behaves like blast wav...
HIGH-FIDELITY NUMERICAL INVESTIGATION OF A HIGH PRESSURE TURBINE COOLED VANE Gokenis, Furkan; Peneklioglu, Kagan; Oksuz, Ozhan; Erdem, Erinc; Eyi, Sinan (2024-01-01) A significant portion of a turbine blade/vane might experience a transitional boundary layer presumably on the suction surface, which affects the rate of heat transfer. Appropriate choice of the turbulence model on predict...
Numerical Modeling of Hypersonic Air and Carbon Dioxide Flows in Thermochemical Non-Equilibrium with SU2-NEMO Solver Çelik, Mutlu; Uğur, Ömür; Eyi, Sinan (2022-06-23) Modeling of hypersonic aerothermodynamics in non-equilibrium flow is a challenging problem of aircraft design. Especially, prediction of atmospheric reentry and other planet’s entry heat loads are significant for aerospace...
Diffusion in Hypersonic Flows Gür, Hilmi Berk; Eyi, Sinan (Nova Science Pub Inc, 2020-10-01) In hypersonic flows, air goes into chemical reaction due to high temperature. Therefore, in addition to the Navier-Stokes Equations, chemical reaction equations need to be solved to analyze hypersonic flows. A model may be...
Computational modelling and analysis of porous bleed holes at supersonic speeds Akar, Gökhan; Eyi, Sinan (2020-01-01) © 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.Shock Wave / Boundary Layer Interaction is an important issue that should be taken into account when studying inlet design. Bleed ho...
Comparison of Fully Coupled and DecoupledModeling Results of Graphite Ablation In Hypersonic Flows Onay, Oğuz; Eyi, Sinan (2019-09-20) A thermochemical ablation modeling tool is developed for graphite material in air for reactive hypersonic flows. Multi-species and axisymmetric Navier-Stokes equations are solved for the flow field analysis. Arrhennius typ...

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