Computational fluid dynamics reveals 

 the interaction between the freestream 

 airflow and engine exhaust of a YAV-8B 

 Harrier Vertical Takeoff and Landing 

 (VTOL) aircraft. The simulation shows 

 how hot gas from the nozzles is ingest- 

 ed by the engines, reducing their effec- 

 tiveness. 



demonstrated the ENSAERO computer algorithm, which 

 couples aerodynamics and structures analysis modules 

 on the Intel iPSC/860 massively parallel computer. 



Results involve the coupling of a low-fidelity structures 

 code to a high-fidelity aerodynamics analysis routine. 

 This multidisciplinary research, in conjunction with the 

 increased performance offered by massively parallel 

 computers, will enhance the ability of aircraft manufac- 

 turers to quickly analyze different design options and 

 accelerate the prototyping process, and thereby reduce 

 design cycle costs in addition to producing vehicles with 

 improved performance. 



Computational Aerosciences Consortium 



This consortium of U.S. industrial firms works with NASA 

 to facilitate the development of precompetitive software 

 for the implementation of integrated multidisciplinary 

 design, analysis, and optimization systems on heteroge- 

 neous computer networks. Incorporation of these sys- 

 tems into the product development process can increase 

 U.S. competitiveness through reduced design cycle time 

 and life cycle costs and increased quality of technology- 

 driven products. Consortium members include: 



Allison Gas Turbines 



Boeing Helicopter 



Ford 



General Electric 



General Motors 



Grumman 



McDonnell Douglas 



Northrop 



Rockwell 



United Technologies 



Vought 



High Performance Computing Software Exchange 



The inherent size and complexity of HPGC problems will 

 increase the cost and difficulty of developing and main- 

 taining robust applications software. The HPGC 

 Software Exchange Experiment encourages the sharing 

 and reuse of software modules by providing an infras- 

 tructure of interconnected software repositories. The 

 HPGC Software Exchange Experiment System repre- 

 sents the first time that a number of different agencies 



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