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Endwall Losses And Flow Unsteadiness In A Turbine Blade Cascade
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Book Synopsis Endwall Losses and Flow Unsteadiness in a Turbine Blade Cascade by : L. Adjlout
Download or read book Endwall Losses and Flow Unsteadiness in a Turbine Blade Cascade written by L. Adjlout and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this paper is to describe an investigation of the flow within and downstream of a turbine blade cascade of high aspect ratio. A detailed experimental investigation into the changes in the endwall boundary layer in the cascade (100 deg camber angle) and total pressure loss downstream of the cascade was carried out. Flow visualization was used in order to obtain detailed photographs of the flow patterns on the endwall and for exhibiting the trailing edge vortices. Pressure measurements were carried out using a miniature cranked Kiel probe for three planes downstream of the cascade, with two levels of turbulence intensity of the free stream. Pressure distributions on the blade were measured at three spanwise locations, namely 4, 12, and 50 percent of the full span from the wall. Hot-wire anenometry combined with a spectrum analyzer program was used to determine the frequencies of the flow oscillations. The change in turbulence level of the free stream has a significant influence on all three pressure distributions. The striking difference between two of the pressure distributions is in the aft half of the suction side where the distribution with the lower turbulence intensity has the larger lift. The oil flow visualization reveals what appear to be two separation lines within the passage and are believed to originate from the horseshoe vortex. The pitchwise-averaged total pressure loss coefficient increases with the distance of the measurement plane downstream of the cascade blades. A substantial part of this loss increase close to the wall is caused by the high rate of shear of the new boundary layer on the endwall.5.
Book Synopsis End-wall Skin Friction and Secondary Flow Losses Downstrean of a Turbine Blade Cascade by : Abdelkader Boumedmed
Download or read book End-wall Skin Friction and Secondary Flow Losses Downstrean of a Turbine Blade Cascade written by Abdelkader Boumedmed and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Unsteady Characteristics of Endwall Vortices Using Surface-mounted Hot-film Sensors by : Emma Michelle Veley
Download or read book Measurement of Unsteady Characteristics of Endwall Vortices Using Surface-mounted Hot-film Sensors written by Emma Michelle Veley and published by . This book was released on 2018 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-lift low-pressure turbine blades produce significant losses at the junction with the endwall. The losses are caused by several complex three-dimensional vortical flow structures, which interact with the blade suction surface boundary layer. This study investigates the unsteady characteristics of these endwall flow structures on a highly loaded research profile and the adjacent endwall using surface-mounted hot-film sensors. Experiments were conducted in a low-speed linear cascade wind tunnel. The front-loaded blade profile was subjected to three different inlet conditions, consisting of two turbulence levels, and three incoming boundary layer thicknesses. Multiple surface-mounted hot-film sensors were installed throughout the passage.This thesis progressed in three stages of research. The first verified that the hot-film sensors could be used to detect flow structures in the cascade. The second used the results from installed hot-films to examine the unsteady characteristics of vortices formed near the leading edge and the propagation of the passage vortex across the passage where it interacts with a corner separation along the suction surface. Simultaneous measurements from the hot-film sensors were analyzed for frequency spectra and time lag in order to provide new insight into the endwall flow dynamics. Finally, signatures from the hot-films were linked to specific flow phenomena through concurrent flow visualization. At each stage of the investigation, results were compared to the results of a numerical simulation.
Book Synopsis Gas Turbine Design, Components and System Design Integration by : Meinhard T. Schobeiri
Download or read book Gas Turbine Design, Components and System Design Integration written by Meinhard T. Schobeiri and published by Springer. This book was released on 2019-12-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second revised and enhanced edition of the book Gas Turbine Design, Components and System Integration written by a world-renowned expert with more than forty years of active gas turbine R&D experience. It comprehensively treats the design of gas turbine components and their integration into a complete system. Unlike many currently available gas turbine handbooks that provide the reader with an overview without in-depth treatment of the subject, the current book is concentrated on a detailed aero-thermodynamics, design and off-deign performance aspects of individual components as well as the system integration and its dynamic operation. This new book provides practicing gas turbine designers and young engineers working in the industry with design material that the manufacturers would keep proprietary. The book is also intended to provide instructors of turbomachinery courses around the world with a powerful tool to assign gas turbine components as project and individual modules that are integrated into a complete system. Quoting many statements by the gas turbine industry professionals, the young engineers graduated from the turbomachinery courses offered by the author, had the competency of engineers equivalent to three to four years of industrial experience.
Book Synopsis Turbomachinery Fluid Dynamics and Heat Transfer by : Hah
Download or read book Turbomachinery Fluid Dynamics and Heat Transfer written by Hah and published by Routledge. This book was released on 2017-10-02 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This festschrift in honor of Professor Budugur Lakshminarayana's 60th birthday-based on the proceedings of a symposium on Turbomachinery Fluid Dynamics and Heat Transfer held recently at The Pennsylvania State University, University Park-provides authoritative and conclusive research results as well as new insights into complex flow features found in the turbomachinery used for propulsion, power, and industrial applications. Explaining in detail compressors, heat transfer fields in turbines, computational fluid dynamics, and unsteady flows, Turbomachinery Fluid Dynamics and Heat Transfer covers: Mixing mechanisms, annulus wall boundary layers, and the flow field in transonic turbocompressors The numerical implementation of turbulence models in a computer code Secondary flows, film cooling, and thermal turbulence modeling The visualization method of modeling using liquid crystals Innovative techniques in the computational modeling of compressor and turbine flows measurement in unsteady flows as well as axial flows and compressor noise generation And much more Generously illustrated and containing key bibliographic citations, Turbomachinery Fluid Dynamics and Heat Transfer is an indispensable resource for mechanical, design, aerospace, marine, manufacturing, materials, industrial, and reliability engineers; and upper-level undergraduate and graduate students in these disciplines.
Book Synopsis Endwall Flow/loss Mechanisms in a Linear Turbine Cascade with Blade Tip-clearance by : A. Yamamoto
Download or read book Endwall Flow/loss Mechanisms in a Linear Turbine Cascade with Blade Tip-clearance written by A. Yamamoto and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis End-wall Skin Friction and Secondary Flow Losses Downstream of a Turbine Blade Cascade by : Abdelkader BOUMEDMED
Download or read book End-wall Skin Friction and Secondary Flow Losses Downstream of a Turbine Blade Cascade written by Abdelkader BOUMEDMED and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Flows and Losses in a Turbine Cascade by : D. G. Gregory-Smith
Download or read book Secondary Flows and Losses in a Turbine Cascade written by D. G. Gregory-Smith and published by . This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: In designing axial flow turbines, one needs relatively simple prediction techniques for the angle variations and losses produced by secondary flows. To improve the physical basis of such techniques, an investigation was made of the flow in a cascade of large scale rotor blades of some 110 deg of turning. The aspect around 0.2 of the span. The flow was traversed in great detailed on ten planes using cobra-type probes with a computerised data recording and analysis system. Results are presented graphically using contour and vector plots on various planes through the flow field. The horse-show vortex and passage vortex development are clearly seen, with the upstream boundary layer being shed downstream as a loss core. Another region of high loss is related to a counter vortex in the corner between the sunction surface and the end wall. Results were also pitch averaged, and compared with predictions of angle and loss distribution. Some traversing was carried out using hot wire anemometry. Regions of high turbulence intensity and shear stress were identified, associated with the regions of high loss. Some indication is given of the mechanisms of loss production within the cascade.
Book Synopsis Experimental Investigation of Loss in an Annular Cascade of Turbine-nozzle Blades of Free Vortex Design by : Hubert W. Allen
Download or read book Experimental Investigation of Loss in an Annular Cascade of Turbine-nozzle Blades of Free Vortex Design written by Hubert W. Allen and published by . This book was released on 1953 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the flow pattern immediately downstream of an annular cascade of nozzle blades designed for vortex-type velocity distribution and hub discharge angle of approximately 65 degrees from axial was conducted in order to obtain a better understanding of the processes by which the distribution of losses and deviations from design turning angle occur. For the two Mach numbers investigated, the loass region at the outer shroud decreased while that at the inner shroud increased with increasing Mach number.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1970 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Axial Turbine Aerodynamics for Aero-engines by : Zhengping Zou
Download or read book Axial Turbine Aerodynamics for Aero-engines written by Zhengping Zou and published by Springer. This book was released on 2018-01-11 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a monograph on aerodynamics of aero-engine gas turbines focusing on the new progresses on flow mechanism and design methods in the recent 20 years. Starting with basic principles in aerodynamics and thermodynamics, this book systematically expounds the recent research on mechanisms of flows in axial gas turbines, including high pressure and low pressure turbines, inter-turbine ducts and turbine rear frame ducts, and introduces the classical and innovative numerical evaluation methods in different dimensions. This book also summarizes the latest research achievements in the field of gas turbine aerodynamic design and flow control, and the multidisciplinary conjugate problems involved with gas turbines. This book should be helpful for scientific and technical staffs, college teachers, graduate students, and senior college students, who are involved in research and design of gas turbines.
Download or read book Journal of Turbomachinery written by and published by . This book was released on 1991 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Analysis of Losses and Secondary Flow in Turbine Cascades by : W. Hosny
Download or read book An Analysis of Losses and Secondary Flow in Turbine Cascades written by W. Hosny and published by . This book was released on 1971 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general review of different cascade losses is presented with emphasis on the secondary flow. An analytical analysis utilizing the Squire and Winter secondary flow analysis along with the triangle model for end wall boundary layer proposed by Taylor is detailed in an attempt to show the behavior of streamlines near the end wall. (Author).
Download or read book ASME Technical Papers written by and published by . This book was released on 2001 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanisms of Endwall/leakage Flows and the Associated Losses in a Linear Turbine Rotor Cascade with Blade Tip-clearance by : Atsumasa Yamamoto
Download or read book Mechanisms of Endwall/leakage Flows and the Associated Losses in a Linear Turbine Rotor Cascade with Blade Tip-clearance written by Atsumasa Yamamoto and published by . This book was released on 1988 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Flow and Heat Transfer Control in Gas Turbine Inlet Nozzle Guide Vanes by : Steven Wayne Burd
Download or read book Secondary Flow and Heat Transfer Control in Gas Turbine Inlet Nozzle Guide Vanes written by Steven Wayne Burd and published by . This book was released on 1998 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary Flows in Turbomachines by : Von Karman Institute for Fluid Dynamics
Download or read book Secondary Flows in Turbomachines written by Von Karman Institute for Fluid Dynamics and published by . This book was released on 1975 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
