Speaker：Prof. Yang-Yao Niu 牛仰堯 教授 (Department of Aerospace Engineering, Tamkang University)
Title：Modeling Atomization and Detonation in Compressible Multiphase Reactive Flows Simulation Using Deduced Chemical Kinetic Models.
Time：10/2 (Thu) 14:20
Location：2nd floor large lecture hall of IONTU
Abstract:
This study addresses compressible, multiphase, multicomponent, chemically reactive flows relevant to high-speed aerospace applications, including injection, spray, and detonation engines. Numerical models based on the five-equation Euler and Navier–Stokes equations with chemistry are solved using Strang splitting and ATM-type AUSMD flux evaluation. A multifluid approach with a Lagrangian KH–RT breakup model is proposed to capture liquid droplet atomization, shock interactions, and spray deformation, showing good agreement with experimental data. A reduced chemical mechanism is further developed for efficient simulation of oblique detonation waves (ODWs), highlighting the critical role of ignition delay, heat release, grid resolution, and fuel–air ratio in detonation stability. The combined ATM reconstruction and AUSM+ methods effectively capture discontinuities.These findings provide tools for accurate and efficient optimization of oblique detonation wave engines.
Keywords:
Oblique detonation, CFD, shock wave, Reduced Chemical Kinetic Models, hydrocarbon fuel
