Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 2 Unsteady Ducted Propfan Analysis Computer Program Users Manual written by and published by . This book was released on 1991 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 2 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-18 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was the development of a time-dependent three-dimensional Euler/Navier-Stokes aerodynamic analysis to predict unsteady compressible transonic flows about ducted and unducted propfan propulsion systems at angle of attack. The computer codes resulting from this study are referred to as Advanced Ducted Propfan Analysis Codes (ADPAC). This report is intended to serve as a computer program user's manual for the ADPAC developed under Task 2 of NASA Contract NAS3-25270, Unsteady Ducted Propfan Analysis. Aerodynamic calculations were based on a four-stage Runge-Kutta time-marching finite volume solution technique with added numerical dissipation. A time-accurate implicit residual smoothing operator was utilized for unsteady flow predictions. For unducted propfans, a single H-type grid was used to discretize each blade passage of the complete propeller. For ducted propfans, a coupled system of five grid blocks utilizing an embedded C-grid about the cowl leading edge was used to discretize each blade passage. Grid systems were generated by a combined algebraic/elliptic algorithm developed specifically for ducted propfans. Numerical calculations were compared with experimental data for both ducted and unducted propfan flows. The solution scheme demonstrated efficiency and accuracy comparable with other schemes of this class. Hall, Edward J. and Delaney, Robert A. and Bettner, James L. Unspecified Center COMPUTATIONAL FLUID DYNAMICS; COMPUTER PROGRAMS; CONTRAROTATING PROPELLERS; DUCTED FANS; EULER EQUATIONS OF MOTION; NAVIER-STOKES EQUATION; PROP-FAN TECHNOLOGY; TRANSONIC FLOW; UNSTEADY FLOW; AERODYNAMIC CHARACTERISTICS; ALGORITHMS; ANGLE OF ATTACK; FINITE VOLUME METHOD; GRID GENERATION (MATHEMATICS); RUNGE-KUTTA METHOD; TIME MARCHING; USER MANUALS (COMPUTER PROGRAMS)...
Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 2 Unsteady Ducted Propfan Analysis written by and published by . This book was released on 1991 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 5 Unsteady Counterrotation Ducted Propfan Analysis Computer Program User s Manual written by and published by . This book was released on 1993 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 4 Advanced Fan Section Aerodynamic Analysis Computer Program User s Manual written by and published by . This book was released on 1992 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 5 Unsteady Counterrotation Ducted Propfan Analysis written by and published by . This book was released on 1993 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems Task 5 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was the development of a time-marching three-dimensional Euler/Navier-Stokes aerodynamic analysis to predict steady and unsteady compressible transonic flows about ducted and unducted propfan propulsion systems employing multiple blade rows. The computer codes resulting from this study are referred to as ADPAC-AOACR (Advanced Ducted Propfan Analysis Codes-Angle of Attack Coupled Row). This report is intended to serve as a computer program user's manual for the ADPAC-AOACR codes developed under Task 5 of NASA Contract NAS3-25270, Unsteady Counterrotating Ducted Propfan Analysis. The ADPAC-AOACR program is based on a flexible multiple blocked grid discretization scheme permitting coupled 2-D/3-D mesh block solutions with application to a wide variety of geometries. For convenience, several standard mesh block structures are described for turbomachinery applications. Aerodynamic calculations are based on a four-stage Runge-Kutta time-marching finite volume solution technique with added numerical dissipation. Steady flow predictions are accelerated by a multigrid procedure. Numerical calculations are compared with experimental data for several test cases to demonstrate the utility of this approach for predicting the aerodynamics of modern turbomachinery configurations employing multiple blade rows. Hall, Edward J. and Delaney, Robert A. and Adamczyk, John J. and Miller, Christopher J. and Arnone, Andrea and Swanson, Charles Unspecified Center NASA-CR-187125, NAS 1.26:187125 NAS3-25270; RTOP 535-03-10...
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1994-10 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Task 7 ADPAC User s Manual written by E. J. Hall and published by . This book was released on 1996 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this study was to develop a 3-D numerical analysis for compressor casing treatment flowfields. The current version of the computer code resulting from this study is referred to as ADPAC (Advanced Ducted Propfan Analysis Codes-Version 7). This report is intended to serve as a computer program user's manual for the ADPAC code developed under Tasks 6 and 7 of the NASA Contract. The ADPAC program is based on a flexible multiple- block grid discretization scheme permitting coupled 2-D/3-D mesh block solutions with application to a wide variety of geometries. Aerodynamic calculations are based on a four-stage Runge-Kutta time-marching finite volume solution technique with added numerical dissipation. Steady flow predictions are accelerated by a multigrid procedure. An iterative implicit algorithm is available for rapid time-dependent flow calculations, and an advanced two equation turbulence model is incorporated to predict complex turbulent flows. The consolidated code generated during this study is capable of executing in either a serial or parallel computing mode from a single source code. Numerous examples are given in the form of test cases to demonstrate the utility of this approach for predicting the aerodynamics of modem turbomachinery configurations.
Download or read book Aeronautical Engineering written by and published by . This book was released on 1993 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994 with total page 1154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engine Seal Technology Requirements to Meet NASA s Advanced Subsonic Technology Program Goals written by Bruce M. Steinetz and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1828 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book 30th AIAA ASME SAE ASEE Joint Propulsion Conference written by and published by . This book was released on 1994 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ADPAC V1 0 User s Manual written by and published by . This book was released on 1999 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
