Award Data

ABSTRACT: Combustion stability is critical to the performance of augmented military jet engines. Instabilities such as screech can result in reduced augmentor performance, blowout, or even catastrophic failure. Screech remains a difficult problem to predict and mitigate, and its occurrence can limit the operational flight envelope of military systems. Many of the passive techniques used to sup ...

ABSTRACT: Advanced space-borne electro-optical payloads require cooling at temperatures of 10 to 20 K. Cooling loads for these detectors will range from 0.25 W to 1.0 W at the primary load site, with additional loads at higher temperatures. During this program, we propose to build and test a multi-stage hybrid cryocooler that is optimized for cooling at a primary load temperature of 10 to 20 K. ...

ABSTRACT: Combustion instabilities, such as screech, are an ongoing challenge for augmented military propulsion systems. Diagnostics that elucidate the mechanism(s) of combustion instability are needed to increase the robustness of current engines and to develop improved design rules for future systems. Diagnostic measurements in augmentors are challenging due to the hostile environment and lim ...

"SSSC is pleased to propose the development and delivery of a Hostile Fire Indication Sensor (HFIS) based on the Phase I design concept. The resulting system will limit the number of circuit card assemblies to two: one for the short wave infrared (SWIR)

LOW SPEED, TWO PHASE (VAPOR-LIQUID) FLOW REGIMES ARE IMPORTANT TO SEVERAL SIGNIFICANT HEAT TRANSFER PROBLEMS IN SPACECRAFT. LOW SPEED FLOW RATES ALSO CREATE THE MOST GRAVITY-AFFECTED FLOW REGIMES. HIGH SPEED FLOW RATES CREATE FLOW REGIMES THAT ARE AFFECTED LITTLE BY GRAVITY. FEW STUDIES EXIST WHICH GIVE AN OVERVIEW OF FLOW REGIMES IN ZERO GRAVITY. IN PARTICULAR, FEW STUDIES HAVE ATTEMPTED TO USE R ...

GAASP SOLAR CELLS PLACED ON TOP OF CONVENTIONAL SILICON SOLAR CELL ARRAYS CAN INCREASE THE ENERGY CONVERSION EFFICIENCY OF THE SYSTEM AS MUCH AS 100%. ASTROPOWER DIVISION OF ASTROSYSTEMS, INC. PROPOSES TO DEVELOP A HIGH BAND GAP TOP SOLAR CELL FOR ATTACHMENT TO CONVENTIONALS ILICON SOLAR CELLS. TRANSPARENT GAP SUBSTRATES WILL BE USED WITH EPITAXIALLY GROWN LAYERS OF GAASPH HAVING A BAND GAP OF 1.7 ...

THE TASK GOAL IS TO IDENTIFY A COMPLETE SET OF OPERATING SYSTEM PRIMITIVE (OR LOW-LEVEL OPERATING SYSTEM FUNCTIONS) WHICH ARE SUFFICIENT TO SUPPORT REAL-TIME MULTI-TASKING APPLICATIONS, WHICH ARE COMPATIBLE WITH ADA PROGRAMMING ENVIRONMENTS, AND WHICH ARE AMENABLE TO EFFICIENT IMPLEMENTATIONS IN MICROCODE OR HARDWARE. TECHNIQUES TO EVALUATE THE FEASIBILITY OF SUCH IMPLEMENTATIONS IN VARIOUS ENVIRO ...

A SIX MONTH PROGRAM TO DEVELOP A RUGGED NEW DEVICE FOR MONITORING THE ONSET OF ICE FORMATION ON SURFACES OF TRANSPORTATION VEHICLES, ROADS, BRIDGES AND AIRCRAFTS, WILL BE DEVELOPED AND A PROTOTYPE WILL BE LABORATORY TESTED. THE NOVEL GAGE AND ELECTRONIC SYSTEM IS PARTLY BASED ON THE TECHNOLOGY APPLIED TO MEASURE CONDUCTIVITY OF SOLUTIONS. BASED ON EXISTING TECHNOLOGY, AND ALREADY TESTED UNDER HIGH ...

A CATHODE WILL BE DEVELOPED WHICH MINIMIZES THE HEATING POWER REQUIRED PER AMPERE OF ELECTRON GUN BEAM CURRENT, IS OF STUDY CONSTRUCTION TO WITHSTAND ROCKET FLIGHT, DOES NOT DETERIORATE DURING EXPOSURE TO ATMOSPHERIC GASSES WHILE COLD AND PRODUCES AT LEAST TENS OF AMPERES CURRENT. AN ELECTRON GUN WILL BE DESIGNED WHICH WILL BE CAPABLE OF TENS OF AMPERES BEAM CURRENT AT ENERGIES UP TO TENS OF KILOV ...

A FLIGHT MODULE WILL BE DESIGNED AND CONSTRUCTED THAT WILL LEAD TO THE CONSTUCTION OF AN ELECTRON GUN SUITABLE FOR ROCKET, SPACE SHUTTLE, AND SATELLITE FLIGHT. AN ELECTRON GUN MODULE WITH A WIDE DYNAMIC RANGE IN CURRENT. ENERGY, ANDDENSITY WILL BE CONDTRUCTED, CAPABLE OF AT LEAST 100 MILLI- AMPERES AND ABOVE 10 KILOVOLTS BEAM ENERGY. A CATHODE WILL BE DESIGNED TO MEET THE ABOVE SPECIFICATIONS AND ...