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Design And Implementation Of A Distributed Version Of The Nasa Engine Performance Program
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722338565 Total Pages :64 pages Book Rating :4.3/5 (385 download)
Book Synopsis Design and Implementation of a Distributed Version of the NASA Engine Performance Program by : National Aeronautics and Space Administration (NASA)
Download or read book Design and Implementation of a Distributed Version of the NASA Engine Performance Program written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed NEPP is a new version of the NASA Engine Performance Program that runs in parallel on a collection of Unix workstations connected through a network. The program is fault-tolerant, efficient, and shows significant speed-up in a multi-user, heterogeneous environment. This report describes the issues involved in designing distributed NEPP, the algorithms the program uses, and the performance distributed NEPP achieves. It develops an analytical model to predict and measure the performance of the simple distribution, multiple distribution, and fault-tolerant distribution algorithms that distributed NEPP incorporates. Finally, the appendices explain how to use distributed NEPP and document the organization of the program's source code. Cours, Jeffrey T. Unspecified Center...
Book Synopsis Design and Implementation of a Distributed Version of the NASA Engine Performance Program by : Jeffrey Todd Cours
Download or read book Design and Implementation of a Distributed Version of the NASA Engine Performance Program written by Jeffrey Todd Cours and published by . This book was released on 1994 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724989178 Total Pages :26 pages Book Rating :4.9/5 (891 download)
Book Synopsis A Distributed Version of the NASA Engine Performance Program by : National Aeronautics and Space Administration (NASA)
Download or read book A Distributed Version of the NASA Engine Performance Program written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-09 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed NEPP, a version of the NASA Engine Performance Program, uses the original NEPP code but executes it in a distributed computer environment. Multiple workstations connected by a network increase the program's speed and, more importantly, the complexity of the cases it can handle in a reasonable time. Distributed NEPP uses the public domain software package, called Parallel Virtual Machine, allowing it to execute on clusters of machines containing many different architectures. It includes the capability to link with other computers, allowing them to process NEPP jobs in parallel. This paper discusses the design issues and granularity considerations that entered into programming Distributed NEPP and presents the results of timing runs. Cours, Jeffrey T. and Curlett, Brian P. Glenn Research Center NASA-TM-106208, E-7918, NAS 1.15:106208 RTOP 505-69-50...
Book Synopsis A Distributed Version of the NASA Engine Performance Program by :
Download or read book A Distributed Version of the NASA Engine Performance Program written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725641211 Total Pages :34 pages Book Rating :4.6/5 (412 download)
Book Synopsis Design of Object-Oriented Distributed Simulation Classes by : National Aeronautics and Space Administration (NASA)
Download or read book Design of Object-Oriented Distributed Simulation Classes written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed simulation of aircraft engines as part of a computer aided design package is being developed by NASA Lewis Research Center for the aircraft industry. The project is called NPSS, an acronym for 'Numerical Propulsion Simulation System'. NPSS is a flexible object-oriented simulation of aircraft engines requiring high computing speed. It is desirable to run the simulation on a distributed computer system with multiple processors executing portions of the simulation in parallel. The purpose of this research was to investigate object-oriented structures such that individual objects could be distributed. The set of classes used in the simulation must be designed to facilitate parallel computation. Since the portions of the simulation carried out in parallel are not independent of one another, there is the need for communication among the parallel executing processors which in turn implies need for their synchronization. Communication and synchronization can lead to decreased throughput as parallel processors wait for data or synchronization signals from other processors. As a result of this research, the following have been accomplished. The design and implementation of a set of simulation classes which result in a distributed simulation control program have been completed. The design is based upon MIT 'Actor' model of a concurrent object and uses 'connectors' to structure dynamic connections between simulation components. Connectors may be dynamically created according to the distribution of objects among machines at execution time without any programming changes. Measurements of the basic performance have been carried out with the result that communication overhead of the distributed design is swamped by the computation time of modules unless modules have very short execution times per iteration or time step. An analytical performance model based upon queuing network theory has been designed and implemented. Its application to realistic configurations has not...
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723448119 Total Pages :118 pages Book Rating :4.4/5 (481 download)
Book Synopsis The Navy/NASA Engine Program (Nnep89) by : National Aeronautics and Space Administration (NASA)
Download or read book The Navy/NASA Engine Program (Nnep89) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: An engine simulation computer code called NNEP89 was written to perform 1-D steady state thermodynamic analysis of turbine engine cycles. By using a very flexible method of input, a set of standard components are connected at execution time to simulate almost any turbine engine configuration that the user could imagine. The code was used to simulate a wide range of engine cycles from turboshafts and turboprops to air turborockets and supersonic cruise variable cycle engines. Off design performance is calculated through the use of component performance maps. A chemical equilibrium model is incorporated to adequately predict chemical dissociation as well as model virtually any fuel. NNEP89 is written in standard FORTRAN77 with clear structured programming and extensive internal documentation. The standard FORTRAN77 programming allows it to be installed onto most mainframe computers and workstations without modification. The NNEP89 code was derived from the Navy/NASA Engine program (NNEP). NNEP89 provides many improvements and enhancements to the original NNEP code and incorporates features which make it easier to use for the novice user. This is a comprehensive user's guide for the NNEP89 code. Plencner, Robert M. and Snyder, Christopher A. Glenn Research Center COMPUTER PROGRAMS; ENGINE DESIGN; THERMODYNAMIC CYCLES; TURBINE ENGINES; USER MANUALS (COMPUTER PROGRAMS); CHEMICAL EQUILIBRIUM; COMPONENT RELIABILITY; ENGINE PARTS; STEADY STATE; THERMODYNAMICS; TURBOSHAFTS; VARIABLE CYCLE ENGINES...
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1994-07 with total page 1438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722876975 Total Pages :28 pages Book Rating :4.8/5 (769 download)
Book Synopsis The Navy/NASA Engine Program (Nnep89) by : National Aeronautics and Space Administration (NASA)
Download or read book The Navy/NASA Engine Program (Nnep89) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-13 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NNEP is a general computer program for calculating aircraft engine performance. NNEP has been used extensively to calculate the design and off-design (matched) performance of a broad range of turbine engines, ranging from subsonic turboprops to variable cycle engines for supersonic transports. Recently, however, there has been increased interest in applications for which NNEP is not capable of simulating, such as the use of alternate fuels including cryogenic fuels and the inclusion of chemical dissociation effects at high temperatures. To overcome these limitations, NNEP was extended by including a general chemical equilibrium method. This permits consideration of any propellant system and the calculation of performance with dissociation effects. The new extended program is referred to as NNEP89. Gordon, Sanford Unspecified Center NAS3-24105; RTOP 505-69-50...
Download or read book Solar Energy Update written by and published by . This book was released on 1982 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA Space Flight Program and Project Management Handbook by : Nasa
Download or read book NASA Space Flight Program and Project Management Handbook written by Nasa and published by . This book was released on 2018-03-21 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is in full-color - other editions may be in grayscale (non-color). The hardback version is ISBN 9781680920512 and the paperback version is ISBN 9781680920505. The NASA Space Flight Program and Project Management Handbook (NASA/SP-2014-3705) is the companion document to NPR 7120.5E and represents the accumulation of knowledge NASA gleaned on managing program and projects coming out of NASA's human, robotic, and scientific missions of the last decade. At the end of the historic Shuttle program, the United States entered a new era that includes commercial missions to low-earth orbit as well as new multi-national exploration missions deeper into space. This handbook is a codification of the "corporate knowledge" for existing and future NASA space flight programs and projects. These practices have evolved as a function of NASA's core values on safety, integrity, team work, and excellence, and may also prove a resource for other agencies, the private sector, and academia. The knowledge gained from the victories and defeats of that era, including the checks and balances and initiatives to better control cost and risk, provides a foundation to launch us into an exciting and healthy space program of the future.
Book Synopsis Data Bases and Data Base Systems Related to NASA's Aerospace Program by :
Download or read book Data Bases and Data Base Systems Related to NASA's Aerospace Program written by and published by . This book was released on 1983 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725608870 Total Pages :36 pages Book Rating :4.6/5 (88 download)
Book Synopsis Continued Development of Expert System Tools for Npss Engine Diagnostics by : National Aeronautics and Space Administration (NASA)
Download or read book Continued Development of Expert System Tools for Npss Engine Diagnostics written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this grant were to work with previously developed NPSS (Numerical Propulsion System Simulation) tools and enhance their functionality; explore similar AI systems; and work with the High Performance Computing Communication (HPCC) K-12 program. Activities for this reporting period are briefly summarized and a paper addressing the implementation, monitoring and zooming in a distributed jet engine simulation is included as an attachment. Lewandowski, Henry Glenn Research Center NASA-CR-202436, NAS 1.26:202436 NCC3-400...
Book Synopsis Large Space Structures & Systems in the Space Station Era by :
Download or read book Large Space Structures & Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
