Download or read book Investigation of Gas turbine Exhaust Ducts written by A. I. RASPUTNIS and published by . This book was released on 1966 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is cited that the designing of the exhaust duct profile, i.e., the selection of the shape of its meridian- and transfer-cross sections, is done in order to obtain minimal size, weight, hydraulic losses, and minimal nonuniformity in the gas velocity and gas pressure fields with the maximal diffusivity effect. The effect of improving the exhaust duct on the gas turbine's efficiency is shown by examining the gas flow processes in the turbine and exhaust duct simultaneously. The aerodynamic qualities of the exhaust duct were evaluated by blow-through tests using the duct itself or a model of it. The author discusses these tests at some length expressing the results in graph form. The author concludes that the hydraulic losses in the exhaust duct substantially affect the efficiency of a gas turbine; thus, the reduction of the hydraulic drag coefficient of the exhaust duct from 1.83 to 0.90 made it possible to raise the turbine's efficiency 4-5%. The author adds three other conclusions concerning reduction of hydraulic losses in the exhaust duct, the use of toric dividers in the radial-annular deflection region, and the smallest hydraulic drag coefficient obtained with an exhaust duct. (Author).
Download or read book Pressure Loss Modeling of Non symmetric Gas Turbine Exhaust Ducts Using CFD written by Steven Farber and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In typical gas turbine applications, combustion gases that are discharged from the turbine are exhausted into the atmosphere in a direction that is sometimes different from that of the inlet. In such cases, the design of efficient exhaust ducts is a challenging task particularly when the exhaust gases are also swirling. Designers are in need for a tool today that can guide them in assessing qualitatively and quantitatively the different flow physics in these exhaust ducts so as to produce efficient designs. In this thesis, a parametric Computational Fluid Dynamics (CFD) based study was carried out on non-symmetric gas turbine exhaust ducts where the effects of geometry and inlet aerodynamic conditions were examined. The results of the numerical analysis were used to develop a total pressure loss model. These exhaust ducts comprise an annular inlet, a flow splitter, an annular to rectangular transition region, and an exhaust stub. The duct geometry, which is a three-dimensional complex one, is approximated with a five-parameter model, which was coupled with a design of experiment method to generate a relatively small number of exhaust ducts. The flow in these ducts was simulated using CFD for different values of inlet swirl and aerodynamic blockage and the numerical results were reviewed so as to assess the effects of the geometric and aerodynamic parameters on the total pressure loss in the exhaust duct. These flow simulations were used as a data base to generate a total pressure loss model that designers can use as a tool to build more efficient non-symmetric gas turbine exhaust ducts. The resulting correlation has demonstrated satisfactory agreement with the CFD-based data.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of a Gas Turbine with National Bureau of Standards Body 4811 Ceramic Rotor Blades written by John C. Freche and published by . This book was released on 1948 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1967 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Investigations written by and published by . This book was released on 1967 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Design Study of an Enhanced Mixing Eductor System for the LHA R Gas Turbine Exhaust written by Stephen W. Dudar and published by . This book was released on 2003-12-01 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary design study was conducted to determine the geometry for an enhanced mixing eductor system for the Landing, Helicopter Assault Ship Replacement (LHAR) program gas turbine exhaust. A one-dimensional analytical model, with a correction factor applied to the secondary mass flow, was developed to predict the secondary air mass flow rate and the exhaust temperature at the mixing tube exit plane. The resultant design consisted of a high aspect ratio lobed nozzle and a mixing tube. The model was also used to predict the backpressure developed by the ducting configuration. The proposed design resulted in a 50% reduction in exhaust temperature with only a 6 inch H2O increase in back pressure. A detailed design of the oval-to-rectangular transition duct is provided, based on empirical data from a similar duct design. The study also included a prediction of plume radiation intensity in the 3-5 micron band for various aspect ratio slots.
Download or read book An Investigation Into Mixing Between By pass Air and Turbine Exhaust Gases written by M. Holmes and published by . This book was released on 1965 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1966-11 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Development Progress Report written by United States. Office of Saline Water and published by . This book was released on 1968 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Army Research and Development written by and published by . This book was released on 1962 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Automotive Fuel Economy Research Conference First Proceedings written by and published by . This book was released on 1981 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Abstracts written by United States. National Advisory Committee for Aeronautics and published by . This book was released on with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the National Aerospace Propulsion Conference written by Gullapalli Sivaramakrishna and published by Springer Nature. This book was released on 2022-07-23 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the select proceedings of the 3rd National Aerospace Propulsion Conference (NAPC 2020). It discusses the recent trends in the area of aerospace propulsion technologies covering both air-breathing and non-air-breathing propulsion. The topics covered include state-of-the-art design, analysis and developmental testing of gas turbine engine modules and sub-systems like compressor, combustor, turbine and alternator; advances in spray injection and atomization; aspects of combustion pertinent to all types of propulsion systems and nuances of space, missile and alternative propulsion systems. The book will be a valuable reference for beginners, researchers and professionals interested in aerospace propulsion and allied fields.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Abstracts and Reclassification Notice written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1954 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
