Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"Delayed Detached Eddy Simulation"”.
-
Quantification of Velocity at the Sparkplug in a Lab Scale Combustion Chamber
… volume optical combustion chamber. An Improved Delayed Detached Eddy Simulation (IDDES) study was done to understand the turbulence characteristics of the flow in the optical chamber. Spark anemometry was used to obtain a relationship between the spark plasma evolution and freestream velocity. …
-
Computational Investigation of Perforated Plate Film Cooling Utilizing Conjugate Heat Transfer
… improving flow prediction accuracy. Finally, a Delayed-Detached Eddy Simulation using conjugate heat transfer is performed to demonstrate the improved velocity and temperature prediction accuracy over steady-state simulations, particularly in regions with large turbulent shear and boundary …
-
A Preliminary Study of Acoustic Prediction Technology Based on Detached Eddy Simulations for Supersonic Jets Impinging on Flat Plates
… done using a hybrid RANS/LES technique known as Delayed Detached Eddy Simulation (DDES). A transient solution is calculated using the pressure-based coupled solver formulation with the second-order bounded central-upwind spatial discretization and second-order implicit time marching scheme. Flow …
-
High-Fidelity Modeling of eVTOL Rotor Unsteady Aerodynamic and Aeroacoustic Response to Time-Harmonic Gust
… acoustic post-processor. First, a baseline rotor simulation is conducted under uniform inflow to validate the computational model against experimental data from the Virginia Tech full-scale acoustic measurements of the Joby Aviation 2017 prototype rotor. The comparison of thrust, torque, and sound …
-
Development and Application of Hybrid Wray-Agarwal Turbulence Model and Large-Eddy Simulation
… for many flows. In recent years, the Large Eddy Simulation (LES) approach has been developed which has shown promise of achieving higher accuracy, however it is computationally very intensive and therefore has remained limited to computing relatively simple flows from low to moderate …
-
Aerodynamic and Acoustic Modeling for eVTOL Rotor Noise Prediction
… Navier-Stokes (2D-RANS) airfoil simulations with rotor loading predictions from the Comprehensive Hierarchical Aeromechanics Rotorcraft Model (CHARM), tonal noise calculations using the acoustic solver PSU-WOPWOP, and broadband noise predictions from the UCD-QuietFly framework. …
-
Propeller Noise Prediction of an Urban Air Mobility Vehicle in Urban Environment
… Hybrid turbulence-resolving approaches—Detached Eddy Simulation (DES) and Delayed Detached Eddy Simulation (DDES)—are coupled with the Ffowcs–Williams and Hawkings (FW–H) acoustic analogy to capture both unsteady flow dynamics and far-field sound radiation.</p> <p>The first part focuses …