Award Data

A FEASIBILITY STUDY ON THE DEVELOPMENT OF A STOICHIOMETRIC DIESEL ENGINE IS PROPOSED USING THE THERMAL IGNITION COMBUSTION CHAMBER. THE ADIABATIC DIESEL ENGINE WITHOUT WATER OR AIR COOLING ALLOWS THE THERMAL IGNITION CHAMBER TO STORE HEAT DURING COMBUSTION AND RELEASE THE ENERGY FOR IGNITION IN THE FOLLOWING CYCLE. INJECTION OF FUEL ON TO 1800-2000 DEG. F WALL TEMPERATURE WILL PREPARE THE FUEL FOR ...

A modified engine cycle based on the early intake valve closing of the Miller or the Adkinson cycle is proposed to meet the needs of the future Military Advanced Diesel Engine. The concpet involves the principle of short, effective compression with long expansion ratio to provide high brake thermal efficiency. This concept is executed by a variable timing rotary valve placed before the standard in ...

PDRI proposes to develop a computer-administered and scored situational judgment inventory to predict combat pilot performance. Situational judgment inventories present respondents with a series of job-relevant situations and ask them to indicate which of several alternative actions would be most effective and which would be least effective in each situation. This inventory will consist of items d ...

The promise of formal methods to eliminate design errors in safety critical systems is realizable, however, much of the technology remains academic or removed from current engineering practice. At Derivation Systems, Inc. we believe that in over for formal methods to reach their full potential, a formal design tool must support the generative and deductive aspects of design. We also believe that f ...

The objective of the proposed work is to develop a unified and optimum numerical method for solving fluid-structure interaction problems. We propose to use an unstructured solution-adaptive topology for both fluid and structure, and to discretize the governing equations for both using a common numerical basis. We also propose to use MIMD parallel processing with domain decomposition to allow the s ...

NASA CURRENTLY HAS SEVERAL ASTROPHYSICS MISSIONS PLANNED IN WHICH HELIUM REPLENISHMENT IS IMPORTANT. ONE OF THE TWO LEADING CANDIDATE REPLENISHMENT SYSTEMS REQUIRES A MECHANICAL PUMP. THIS PROGRAM IS INTENDED TO DEVELOP A LONG-LIFE CENTRIFUGAL PUMP TO MEET THESE REQUIREMENTS. IN PHASE I, A PRELIMINARY DESIGN AND ANALYSIS OF A SMALL HIGH SPEED CENTRIFUGAL PUMP WILL BE PERFORMED. THE PUMP WILL BE DE ...

IN THIS PROJECT, WE PROPOSE TO DEVELOP A MULTIGRID SOLVER FOR INTERNAL FLOWS USING GENERALIZED SOLUTION ADAPTIVE MESHES COMPOSED OF TRIANGULAR OR TETRAHEDRAL MESH CELLS. THE RESULTING COMPUTER PROGRAM WILL PERMIT THE SOLUTION OF THREE-DIMENSIONAL TRANSONIC VISCOUS FLOWS IN STATIONARY AND ROTATING DOMAINS, AND WILL HAVE THE ABILITY TO ACCURATELY REPRESENT GEOMETRICALLY COMPLEX CONFIGURATIONS AND TO ...

SEVERAL OF THE LONG-LIFETIME CRYOCOOLERS BEING DEVELOPED FOR SPACE SENSOR APPLICATIONS ARE BASED ON THE REVERSE-BRAYTON CYCLE. AN ATTRACTIVE IMPLEMENTATION OF THE CYCLE WOULD USE HIGH-SPEED, MINIATURE CENTRIFUGAL COMPRESSORS AND TURBOEXPANDERS RUNNING ON GAS BEARINGS TO PROVIDE RELIABLE AND VIBRATION-FREE OPERATION. HARDWARE DEVELOPMENT AND DEMONSTRATION PROGRAMS ARE PRESENTLY UNDERWAY FOR THREE O ...

THIS PROPOSAL DESCRIBES A NOVEL CONCEPT FOR A SINGLE-PHASE HEAT EXCHANGER WHICH ATTAINS VERY HIGH HEAT TRANSFER RATES WITH VERY LOW PRESSURE LOSSES. THE NEW HEAT EXCHANGER OFFERS POTENTIAL BENEFITS TO THE SPACE STATION THERMAL CONTROL SYSTEM, PARTICULARLY THE LIVING MODULE TO THERMAL BUS HEAT TRANSPORT LOOP WHICH IS CONSTRAINED TO USE SINGLE-PHASE WATER AS THE THERMAL TRANSPORT FLUID. SUCH A SYSTE ...

THE OBJECTIVE OF THE PROPOSED WORK (PHASE I AND II) IS TO DEVELOP A COMPUTER PROGRAM FOR MODELING COMPLEX THREE-DIMENSIONAL FLOWS ENCOUNTERED IN NAVAL APPLICATIONS. THE SOFTWARE WILL BE BUILT ON CREARE'S FLUID FLOW MODELING CODE FLUENT/BFC. IN PHASE I, WE WILL DEVELOP THE SPECIFICATIONS FOR THE ENHANCEMENTS TO BE ADDED TO THE PROPOSED CODE. TO DEMONSTRATE THE CURRENT CAPABILITIES OF FLUENT/BFC,WE ...