Well-posed marching of disturbances in a boundary layer using the spatial perturbation equations: Chapter 4
Abstract not provided.
Publications
Numerical dissipation of slow acoustic mode decay in freestream and second mode growth in a high-velocity boundary layer using stability theory and DNS
Abstract not provided.
Risk assessment and ventilation modeling for hydrogen releases in vehicle repair garages
International Journal of Hydrogen Energy
The availability of repair garage infrastructure for hydrogen fuel cell vehicles is becoming increasingly important for future industry growth. Ventilation requirements for hydrogen fuel cell vehicles can affect both retrofitted and purpose-built repair garages and the costs associated with these requirements can be significant. A hazard and operability (HAZOP) study was performed to identify risk-significant scenarios related to light-duty hydrogen vehicles in a repair garage. Detailed simulations and modeling were performed using appropriate computational tools to estimate the location, behavior, and severity of hydrogen release based on key HAZOP scenarios. This work compares current fire code requirements to an alternate ventilation strategy to further reduce potential hazardous conditions. Modeling shows that position, direction, and velocity of ventilation have a significant impact on the amount of instantaneous flammable mass in the domain.
Second mode growth in a high-velocity boundary layer using stability theory and DNS
AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
Direct numerical simulations (DNS) were conducted of a high-velocity flat plate boundary layer with time-periodic fluctuating inflow. The DNS fluctuation growth and evolution over the plate is then compared to the solution as computed using classical linear stability theory (LST) and the parabolized stability equations (PSE) of a second mode eigenfunction. The agreement observed between the eigenfunction from LST and the fundamental harmonic of the temporal Fourier transform (FT) of the DNS simulation demonstrates the ability of the solver to capture the initiation and linear growth of a hypersonic boundary layer instability. The work enables the study of the perturbation’s evolution in the boundary layer as well as provides confidence in the numerical solver to study further development towards non-linear growth and eventual transition to turbulence.
Risk Analysis and Modeling to Improve Hydrogen Fuel Cell Vehicle Repair Garages
Abstract not provided.
Risk Analysis and Modeling to Improve Hydrogen Fuel Cell Vehicle Repair Garages
Abstract not provided.
Risk Assessment and Ventilation Modeling for Hydrogen Vehicle Repair Garages
Abstract not provided.
Risk Assessment and Ventilation Modeling for Hydrogen Vehicle Repair Garages
Abstract not provided.
H2 Fuel Cell Vehicle Repair Garage
Abstract not provided.
𝑯_𝟐 Fuel Cell Vehicle Repair Garage
Abstract not provided.
Uncertainty Quantification Verification and Validation of a Thermal Simulation Tool for Molten Salt Batteries
Abstract not provided.
Uncertainty Quantification Verification and Validation of a Thermal Simulation Tool for Molten Salt Batteries
Abstract not provided.
12 Results