Download or read book A Mathematical Model for Simulating Noise Suppression of Lined Ejectors written by Willie R. Watson and published by . This book was released on 1994 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Mathematical Model for Simulating Noise Suppression of Lined Ejectors written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-28 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mathematical model containing the essential features embodied in the noise suppression of lined ejectors is presented. Although some simplification of the physics is necessary to render the model mathematically tractable, the current model is the most versatile and technologically advanced at the current time. A system of linearized equations and the boundary conditions governing the sound field are derived starting from the equations of fluid dynamics. A nonreflecting boundary condition is developed. In view of the complex nature of the equations, a parametric study requires the use of numerical techniques and modern computers. A finite element algorithm that solves the differential equations coupled with the boundary condition is then introduced. The numerical method results in a matrix equation with several hundred thousand degrees of freedom that is solved efficiently on a supercomputer. The model is validated by comparing results either with exact solutions or with approximate solutions from other works. In each case, excellent correlations are obtained. The usefulness of the model as an optimization tool and the importance of variable impedance liners as a mechanism for achieving broadband suppression within a lined ejector are demonstrated. Watson, Willie R. Langley Research Center RTOP 505-59-52-02...

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1995-03 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1974 with total page 1570 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 1372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Langley Scientific and Technical Information Output 1994 Volume 1 written by and published by . This book was released on 1995 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1963 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Aeronautical Journal written by and published by . This book was released on 1995 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeronautical Enginnering A Cumulative Index to a Continuing Bibliography supplement 312 written by and published by . This book was released on 1994 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Unique Test Facility to Measure Liner Performance with a Summary of Initial Test Results written by and published by . This book was released on 1997 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1976 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commemoration Volume 1970 1991 written by International Society for Air Breathing Engines and published by . This book was released on 1991 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book S A E Transactions written by Society of Automotive Engineers and published by . This book was released on 1972 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning in 1985, one section is devoted to a special topic

Download or read book Management written by and published by . This book was released on 1975 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Management a Continuing Literature Survey with Indexes written by and published by . This book was released on 1975 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: