Page 131 - tech fest 2025 ב״ש חוברת תקצירים

Under-Expanded Supersonic Jet Flow: A Computational Fluid Dynamics Simulation Using “Ansys Fluent”
ME-A-09
Adi Al Toury; eltouryadi@gmail.com Eilon Vanunu; eilonvanunu1@gmail.com
Advisor: Dr. Efi Zemach1,2
1SCE - Shamoon College of Engineering, Be’er Sheva 2SNRC - Soreq Nuclear Research Center
Under-expanded supersonic jets produce complex flow patterns, including shock diamonds, influenced by chamber pressure and expansion conditions. This project investigates how varying chamber conditions affect flow behavior, focusing on pressure, temperature, and Mach number distributions. Computational simulations using “Ansys Fluent” were conducted to analyze shock formations and flow characteristics. Results indicate that higher chamber pressures intensify shock structures, affecting flow stability and energy dissipation. Understanding these effects is essential for optimizing nozzle performance in aerospace applications and improving design efficiency.
Keywords: chamber pressure, flow behavior, Mach number, shock diamonds, under-expanded nozzle
Analyzing the Effect of Various Flow Characteristics on a NACA 0015 Airfoil
ME-A-10
Yanir Organi Hadad; hadadayanir95@gmail.com Imri Meir Peretz; imrip852852@gmail.com
Advisor: Dr. Efi Zemach1,2
1SCE - Shamoon College of Engineering, Be’er Sheva 2SNRC - Soreq Nuclear Research Center
Understanding airflow behavior around airfoils is fundamental to aerodynamic design. This project analyzes the flow over a NACA 0015 airfoil using ‘computational fluid dynamics’ (CFD), to predict lift and drag coefficients at various angles of attack. To validate our numerical model, simulation results were systematically compared with experimental wind tunnel data. This study examined stall onset, flow separation, and the influence of different flow velocities. Turbulence models were applied to improve prediction accuracy at higher angles. The developed model successfully characterizes aerodynamic performance and provides reliable insights, while reducing reliance on physical experiments.
Keywords: airfoil, analysis, CFD, comparison, drag, experimental, flow, lift, NACA, numerical model
Book of Abstracts | 2025
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