Award Data

Power inverters convert electrical power from one voltage and frequency to another. They are used in a variety of commercial and military systems, including electric vehicles, solar and wind energy power conditioning, and More Electric Aircraft. The ability to effectively cool the capacitors in these inverters is limiting the maximum operating temperature and packaging density of the inverters. Cu ...

ChemImage has previously demonstrated the utility of a SWIR sensor for stationary and on the move (OTM) explosive detection, disturbed earth detection and camouflage concealment and detection. ChemImage proposes the combination of a shortwave infrared (SWIR) hyperspectral imaging (HSI) sensor with active illumination sources to allow for both daytime and nighttime operations. We call this sensor ...

Overseas contingency operations and the growing importance of irregular warfare have created an increased need to train military personnel on non-kinetic activities in diverse socio-cultural environments. Serious games --simulation based training using computer game technology -- offers a promising approach to meeting this need, but the technology must first surmount challenges in the form of hi ...

This proposal will lead to the development of a comprehensive aero-acoustic toolkit for predicting the acoustic signatures of tactical projectiles. Development will focus on identification of noise generation mechanisms and their spectral content, propagation of the noise through non-uniform media, accounting for effects of atmospheric attenuation and dispersion as well as prediction of the far-f ...

The program focuses on turbulence modeling enhancements for predicting coupled jet interaction baseflows. Unified kε turbulence model, and varied extensions that provide for scalar fluctutation models (SFM), baroclinic torque effects, realizability constrainst, vorticity/strain non-equilibrium effects, etc. will be systematically evaluated. Complimentary Large Eddy Simulations (LES) and hybrid RA ...

The Phase II program concentrates on improving computational capabilities for analyzing hypersonic missile base flow configurations by utilizing state-of-the-art experimental data and complementary LES data to support development and validation of RANS turbulence models for propulsive base flows. Previously, CRAFT Tech has extended turbulence modeling capabilities for cold propulsive base flows ut ...

This program focuses on the upgrade and validation of advanced turbulence models for the analysis of transpiration in high speed, aero-propulsive flows with and without combustion effects. A major upgrade involves the extension of scalar fluctuation models calibrated for fuel/air mixing to treat transpiration and thus predict near-wall variations of Prandtl and Schmidt numbers for varied injected ...

The program focuses on the development of a unified design and optimization framework for hypersonic scramjet propulsive flowpaths. Preliminary design tools utilizing inverse ray tracing and characteristic techniques, as well as CFD codes containing advanced turbulence and chemical kinetic models are incorporated. The end-to-end design framework starts with basic user-defined parameters such as th ...

The proposed Phase I effort involves the formulation of innovative technical approaches for accurately simulating the transient power-on separation event for a two stage, supersonic/hypersonic missile. Our starting point for analyzing power on missile stage separation involves the use of both structured and unstructured grid Navier-Stokes codes which were used to support the KEI separation problem ...

Innovative approaches to make direct measurements of thrust/drag forces on scramjet inlets will be designed, constructed, and demonstrated in this Phase I program for use in hypersonic shock tunnel facilities. Two force measurements will be made. The first is a local skin friction measurement, that in conjunction with CFD, can help predict integrated drag values. Skin friction gages will be modifi ...