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A new approach is proposed for high fidelity analysis of aeroelastic characteristics of integrally bladed rotors. This new multiscale approach for nonequilibrium flow path analysis will yield high fidelity solutions including all turbulence scales at a fraction of the computational cost of RANS. Integration of this advanced capability within an existing multidisciplinary, multifidelity, transien ...

Combustion instability in liquid rocket engines (LREs) has manifested in nearly all LRE development programs. While the driving mechanisms of combustion instability are vast and coupled, in all instances, the net result is significant cost and schedule over-runs. In today’s business environment, such over-runs are rarely tolerated and generally result in program cancellations. Development of hig ...

Ammonium perchlorate (AP) is the most commonly used oxidizing ingredient in solid propellant formulations. It carries a sufficient excess of oxygen to allow for the combustion of the required binder and added metal, such as aluminum. The major drawback of AP is its chlorine content which results in the formation of large amounts of HCl as a combustion product and causes severe environmental proble ...

Science Research Laboratory (SRL) and the Penn State Electro-Optics Center (PSU) propose to develop intelligent laser diode driver technology, incorporating optical diagnostics, that extends the operating lifetime of laser diode arrays by an order of magnitude. Random perturbations of temperature or current density during operation of a laser diode array can lead to thermal runaway and the formati ...

It has been shown that hydrophobic surfaces can reduce skin-friction drag in micro-fluidic devices. During Phase I research, we will fabricate and test a high performance durable hydrophobic surface coating created by a simple, cost-effective, and environmentally friendly method. This coating could have significant effects on skin-friction drag reduction and/or transition delay in boundary layers. ...

With the rapid release of new software applications, builds and patches for existing applications, and increased mobility of software across networks, more of our systems will run software applications that may not have a full pedigree of evaluation and testing to ensure that they are free from exploits and malware. Additionally, any previous certifications are invalidated at the first update. H ...

It is desirable to make high resolution imagers that simultaneously acquire multispectral information from the same spatial locations; doing so enables a number of target detection and tracking applications. Currently, image resolution is limited by the pixel pitch which cannot be reduced below optical diffraction and carrier diffusion limited values, and by the need to have different pixels resp ...

The TSC team proposes to develop a new generalized Space-Time Adaptive Processing (Generalized STAP) algorithm that discriminates among classes of scatterers. The new generalized formalism is applied to the problem of 3D ISAR imaging of the reentry vehicle (RV) or another object in the ballistic missile threat complex that suppresses radar dipole clutter, using multiple ground-based radars operat ...

Techno-Sciences, Inc. (TSi), in collaboration with the Smart Structures Laboratory of the Alfred Gessow Rotorcraft Center at the University of Maryland (UMD), proposes to develop an innovative mechanized skin technology for large-scale area changes in morphing UAVs. The pneumatically driven morphing skin (PDMS) system will exploit superior performance characteristics of McKibben actuators, in con ...

The proposed work will provide highly reliable electrical machinery systems by developing fault diagnostics, prognostics, and self-healing control capability. In most power systems, individual components have their own fault protection controls built in. The fault protection is not controlled by the larger system power management controls. These component level controls are designed to protect ...