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Pressure And Velocity Measurements In Model And Real Gas Turbine Disk Cavities With Emphasis On Ingress Suppression
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Book Synopsis Pressure and Velocity Measurements in Model and Real Gas Turbine Disk Cavities with Emphasis on Ingress Suppression by : Yaowen Wang
Download or read book Pressure and Velocity Measurements in Model and Real Gas Turbine Disk Cavities with Emphasis on Ingress Suppression written by Yaowen Wang and published by . This book was released on 1991 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ingress Suppression in Gas Turbine Disk Cavities by : Vinod Ishwar Khilnani
Download or read book Ingress Suppression in Gas Turbine Disk Cavities written by Vinod Ishwar Khilnani and published by . This book was released on 1991 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of the Flow Field in a Model 1.5-stage Gas Turbine Rotor-stator Disk Cavity by : Nihal Junnarkar
Download or read book Experimental Study of the Flow Field in a Model 1.5-stage Gas Turbine Rotor-stator Disk Cavity written by Nihal Junnarkar and published by . This book was released on 2010 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major concern in the operation of present-day gas turbine engines is the ingestion of hot mainstream gas into rotor-stator disk cavities of the high-pressure turbine stages. Although the engines require high gas temperature at turbine entry for good performance efficiency, the ingested gas shortens the lives of the cavity internals, particularly that of the rotor disks. Steps such as installing seals at the disk rims and injecting purge (secondary) air bled from the compressor discharge into the cavities are implemented to reduce the gas ingestion. Although there are advantages to the above-mentioned steps, the performance of a gas turbine engine is diminished by the purge air bleed-off. This then requires that the cavity sealing function be achieved with as low a purge air supply rate as possible. This, in turn, renders imperative an in-depth understanding of the pressure and velocity fields in the main gas path and within the disk cavities. In this work, experiments were carried out in a model 1.5-stage (stator-rotor-stator) axial air turbine to study the ingestion of main air into the aft, rotor-stator, disk cavity. The cavity featured rotor and stator rim seals with radial clearance and axial overlap and an inner labyrinth seal. First, time-average static pressure distribution was measured in the main gas path upstream and downstream of the rotor as well as in the cavity to ensure that a nominally steady run condition had been achieved. Main gas ingestion was determined by measuring the concentration distribution of tracer gas (CO2) in the cavity. To map the cavity fluid velocity field, particle image velocimetry was employed. Results are reported for two main air flow rates, two rotor speeds, and four purge air flow rates.
Book Synopsis Experimental Study of Pressure and Main Gas Ingestion Distributions in a Model Rotor-stator Disk Cavity by : Jayanth kumar Thiagarajan
Download or read book Experimental Study of Pressure and Main Gas Ingestion Distributions in a Model Rotor-stator Disk Cavity written by Jayanth kumar Thiagarajan and published by . This book was released on 2013 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ingestion of high temperature mainstream gas into the rotor-stator cavities of a gas turbine is one of the major problems faced by the turbine designers. The ingested gas heats up rotor disks and induces higher thermal stresses on them, giving rise to durability concern. Ingestion is usually reduced by installing seals on the rotor and stator rims and by purging the disk cavity by secondary air bled from the compressor discharge. The geometry of the rim seals and the secondary air flow rate, together, influence the amount of gas that gets ingested into the cavities. Since the amount of secondary air bled off has a negative effect on the gas turbine thermal efficiency, one goal is to use the least possible amount of secondary air. This requires a good understanding of the flow and ingestion fields within a disk cavity. In the present study, the mainstream gas ingestion phenomenon has been experimentally studied in a model single-stage axial flow gas turbine. The turbine stage featured vanes and blades, and rim seals on both the rotor and stator. Additionally, the disk cavity contained a labyrinth seal radially inboard which effectively divided the cavity into a rim cavity and an inner cavity. Time-average static pressure measurements were obtained at various radial positions within the disk cavity, and in the mainstream gas path at three axial locations at the outer shroud spread circumferentially over two vane pitches. The time-average static pressure in the main gas path exhibited a periodic asymmetry following the vane pitch whose amplitude diminished with increasing distance from the vane trailing edge. The static pressure distribution increased with the secondary air flow rate within the inner cavity but was found to be almost independent of it in the rim cavity. Tracer gas (CO2) concentration measurements were conducted to determine the sealing effectiveness of the rim seals against main gas ingestion. For the rim cavity, the sealing effectiveness increased with the secondary air flow rate. Within the inner cavity however, this trend reversed -this may have been due to the presence of rotating low-pressure flow structures inboard of the labyrinth seal.
Book Synopsis Flow and Pressure Conditions Behind Gas Turbine Guide Vane Ring with Straight and Curved Blades by : F. Korbacher
Download or read book Flow and Pressure Conditions Behind Gas Turbine Guide Vane Ring with Straight and Curved Blades written by F. Korbacher and published by . This book was released on 1948 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow and pressure conditions behind turbine stator with twist effect were calculated with respect to turbine stage having straight or twisted blades, with radial pressure gradient taken into consideration. Korbacher considers agreement between calculations and measurements as very good. Pressure and flow field behind stators were investigated as to magnitude and direction.
Book Synopsis Cavity Unsteady-Pressure Measurements at Subsonic and Transonic Speeds by : Maureen B. Tracy
Download or read book Cavity Unsteady-Pressure Measurements at Subsonic and Transonic Speeds written by Maureen B. Tracy and published by . This book was released on 1997 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the ASME Turbo Expo ... by :
Download or read book Proceedings of the ASME Turbo Expo ... written by and published by . This book was released on 2005 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow and Heat Transfer in Gas Turbine Disk Cavities Subject to Nonuniform External Pressure Field by :
Download or read book Flow and Heat Transfer in Gas Turbine Disk Cavities Subject to Nonuniform External Pressure Field written by and published by . This book was released on 1995 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ingestion of hot gas from the main-stream gas path into turbine disk cavities, particularly the first-stage disk cavity, has become a serious concern for the next-generation industrial gas turbines features high rotor inlet temperature. Fluid temperature in the cavities increases further due to windage generated by fluid drag at the rotating and stationary surfaces. The resulting problem of rotor disk heat-up is exacerbated by the high disk rim temperature due to adverse (relatively flat) temperature profile of the mainstream gas in the annular flow passage of the turbine. This describes an investigation into local convective heat transfer coefficient and cooling effectiveness of the rotor disk, flow field in the disk cavity, computation of the flow field and heat transfer in the disk cavity, and mainstream gas injection and rotor disk cooling effectiveness by mass transfer analogy.
Book Synopsis Three Dimensional Time-Resolved Velocity Measurements in a Gas Turbine Model Combustor by : R. Jeckel
Download or read book Three Dimensional Time-Resolved Velocity Measurements in a Gas Turbine Model Combustor written by R. Jeckel and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed time-resolved velocity measurements of the reacting and nonreacting flow in a model combustor are presented. The setup of the analyzed new combustion chamber is introduced. It comprises an alternative design concept for the stabilization: Instead of a swirler four radical air injecting jets are used. For the analysis of the velocity field a two channel dual beam LDA was used. Measurements of the reacting and the nonreacting flow show that turbulence is strongly affected by chemical reaction. For an advanced understanding of the extreme high turbulence levels a time resolved analysis of the velocity is given. Generally it was found that not only the turbulence level was increased by the chemical reaction, but also that the time-scale of the velocity fluctuations was moved to higher frequencies. (Author).
Book Synopsis Aeronautical Enginnering: A Cumulative Index to a Continuing Bibliography (supplement 312) by :
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:
Book Synopsis Detailed Measurements in the Endwall Region of a Gas Turbine Stator Vane by : Moon-Kyoo Brian Kang
Download or read book Detailed Measurements in the Endwall Region of a Gas Turbine Stator Vane written by Moon-Kyoo Brian Kang and published by . This book was released on 1998 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sealing Characteristics of Gas Turbine Disk Cavities in the Presence of Mainstream Flow by : Vinod Ishwar Khilnani
Download or read book Sealing Characteristics of Gas Turbine Disk Cavities in the Presence of Mainstream Flow written by Vinod Ishwar Khilnani and published by . This book was released on 1998 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scalar and Velocity Measurements in a Gas Turbine Combustion Chamber by : Bernhard Brecht
Download or read book Scalar and Velocity Measurements in a Gas Turbine Combustion Chamber written by Bernhard Brecht and published by . This book was released on 1991 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Turbulent Pressure and Temperature Fluctuations in a Gas Turbine Combustor by :
Download or read book Measurement of Turbulent Pressure and Temperature Fluctuations in a Gas Turbine Combustor written by and published by . This book was released on 2003 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Constant Pressure Combustion Charts for Gas Turbines and Turbojet Engines by : Maurice J. Zucrow
Download or read book Constant Pressure Combustion Charts for Gas Turbines and Turbojet Engines written by Maurice J. Zucrow and published by . This book was released on 2013-02 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purdue Engineering Experiment Station, Research Series, No. 127. Purdue University, Engineering Bulletin, V40, No. 2, June, 1956.
Book Synopsis Planar Optical Measurement Methods for Gas Turbine Components by :
Download or read book Planar Optical Measurement Methods for Gas Turbine Components written by and published by . This book was released on 1999 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Lecture Series covers the recent advances of planar optical measurement techniques with respect to their applicability to gas turbine component tests. During the last years much progress has been achieved in various known techniques, and new methods have been developed from which a significant increase of the experimental output of propulsion tests and therefore remarkable cost reduction can be expected. To bring this status into the knowledge of the propulsion specialists is the aim of this lecture series. Its theme is focused on laser measurement methods for the analysis of the internal flow and reaction processes in propulsion engines. It will address techniques for the measurement of flow velocity, flow density, pressure, temperature and species concentration. Only those methods are introduced which are far enough developed to be applicable to the rough test conditions of propulsion experiments. The course will inform the audience about the fundamentals of the advanced measurement techniques, as well as demonstrate their use in the context of practical applications. The material in this publication was collected from the research centers of the different NATO nations.
Book Synopsis Study of Stress States in Gas-turbine Disk as Determined from Measured Operating-temperature Distributions by : J. Elmo Farmer
Download or read book Study of Stress States in Gas-turbine Disk as Determined from Measured Operating-temperature Distributions written by J. Elmo Farmer and published by . This book was released on 1948 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented of an experimental investigation to determine the temperature distribution in an aircraft-engine gas-turbine disk. High axial- and radial-temperature gradients were found to exist both when the engine was accelerated as rapidly as possible to maximum speed and power output and when it was gradually brought to these conditions in a manner typical of normal service operation. Calculated stresses based on the measured temperature distributions are presented.
