Award Data

The proposed research program aims to develop a physics-based identification, modeling and management infrastructure for aeroelastic limit-cycle oscillations. This infrastructure will be built upon high fidelity state-of-the-art theoretical/computational methods as validated and verified by available experimental data bases, and will include (1) rapid flutter boundary determination for a wide ran ...

During Phase I, we have conducted proof-of-principle experiments to fabricate exchange-coupled isotropic permanent magnets with SmFeN-Fe4N compositions employing shock wave consolidation technique. We have also successfully synthesized nearly 100% Fe16N2 in bulk form. Under this Phase II plan, we propose to optimize and further enhance the isotropic exchange-coupled permanent magnets with higher e ...

Under the proposed Phase II STTR effort, Applied Physical Sciences Corp., along with their partners, The Applied Physics Laboratory at the University of Washington, Wilcoxon Research, Inc., and Chesapeake Sciences Corp., proposes to develop an advanced vector hydrophone towed array. This includes a comprehensive acoustic analysis and design, a system interface design that leverages existing tow c ...

Preliminary development of a noise audit model for vector sensor towed arrays will be performed and is focused on tasks related to validating an analytical model of a thin-line array. An in-house numerical code known as the duct transmission line (DTL) modeling tool will be adapted for specific application to towed arrays having periodic impedance discontinuities. Flow noise mitigation technique ...

Single crystal relaxor ferroelectrics, PMN-PT, have shown great promise for broad bandwidth sonar transducers. However, the benefits of PMN-PT are somewhat counterbalanced by its maximum temperature limitation (~80 to 95°C), low coercive field (~2kV/cm) and low mechanical quality factor (60-80) for compact, high power and high duty cycle applications. The new crystal compositions with expanded op ...

Laser Induced Breakdown Spectroscopy (LIBS) is being successfully transitioned to field applications in both close-contact (proximity) and standoff detection modes. LIBS is attractive since it can be used to detect a wide range of chemical, biological and explosive (CBE) hazardous materials. While LIBS is well suited to evaluation of complex hazards, including improvised explosive devices (IEDs) ...

A Phase I program is proposed which lays the groundwork for validation of CFD to accurately model heated exhaust plume discharge from non-conventional exit configurations into low-speed crosswinds. A key component of the Phase I effort is development of a detailed experimental plan to acquire high-fidelity CFD validation data for heated plumes in more complex low-speed flows. The sensitivity of pl ...

Our proposal addresses the enhancement of design capabilities for supersonic inlets using advanced CFD methodology integrated with efficient design-optimization procedures in an automated, GUI driven framework. Three-dimensional CFD solvers, coupled with design optimization techniques, can now reliably refine initial geometries to produce robust, high performance inlet designs accounting for comp ...

The proposed research program aims to develop an efficient, high-fidelity simulation tool for ship-board flight testing of unmanned aerial vehicles (UAVs) that provides a computational testbed for UAV design, autonomous control system design, and UAV/Ship integration analysis. The envisioned flight simulation approach will employ a library of existing high fidelity ship airwake datasets generated ...

A system is being developed for producing c-scans for hand held NDT instruments using hand held probes. The system will work on both flat and curved surfaces and will be accurate to better than 0.1"