Measurements in a Transitional Boundary Layer Under Low-Pressure Turbine Airfoil Conditions
Author:
Publisher:
Published: 2000
Total Pages: 246
ISBN-13:
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Author:
Publisher:
Published: 2000
Total Pages: 246
ISBN-13:
DOWNLOAD EBOOKAuthor: Robert Edward Mayle
Publisher: Logos Verlag Berlin GmbH
Published: 2018
Total Pages: 418
ISBN-13: 3832545980
DOWNLOAD EBOOKSecond Enhanced Edition Suitable for advanced-level courses or an independent study in fluid mechanics, this text by an expert in the field provides the basic aspects of laminar-to-turbulent flow transition in boundary layers. Logically organized into three major parts, the book covers pre- and post-transitional flow, transitional flow, and several advanced topics in periodically disturbed transitional flow. Some of the subjects covered within the book include high-frequency unsteady laminar flow, turbulent flow, natural transition, bypass transition, turbulent spot theory, turbulent spot kinematics and production, correlations for the onset and rate of transition, global and conditional averaging, transitional flow models, wakeinduced transition, multimode transition, and separated-flow transition. Containing some 202 figures (all drawn by the author), 28 tables, 12 appendices, a supplement on tensors, and an extensive bibliography, the 415 page book provides a wealth of data and information about the subject.
Author: Y. Bora Suzen
Publisher:
Published: 2001
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
Published: 2018-09-17
Total Pages: 30
ISBN-13: 9781723760280
DOWNLOAD EBOOKExperimental data from jet-engine tests have indicated that unsteady blade row interactions and separation can have a significant impact on the efficiency of low-pressure turbine stages. Measured turbine efficiencies at takeoff can be as much as two points higher than those at cruise conditions. Several recent studies have revealed that Reynolds number effects may contribute to the lower efficiencies at cruise conditions. In the current study numerical simulations have been performed to study the boundary layer development in a two-stage low-pressure turbine, and to evaluate the transition models available for low Reynolds number flows in turbomachinery. The results of the simulations have been compared with experimental data, including airfoil loadings and integral boundary layer quantities. The predicted unsteady results display similar trends to the experimental data, but significantly overestimate the amplitude of the unsteadiness. The time-averaged results show close agreement with the experimental data.Dorney, Daniel J. and Ashpis, David E. and Halstead, David E. and Wisler, David C.Glenn Research CenterJET ENGINES; TWO STAGE TURBINES; COMPUTERIZED SIMULATION; BALDWIN-LOMAX TURBULENCE MODEL; BOUNDARY LAYER TRANSITION; TRANSITION FLOW; FLOW VISUALIZATION; BOUNDARY LAYER SEPARATION; SEPARATED FLOW; ROTOR BLADES (TURBOMACHINERY); TAKEOFF; CRUISING FLIGHT; COMPUTATIONAL GRIDS; NOZZLE FLOW; SKIN FRICTION; TURBINE BLADES; REYNOLDS NUMBER; FLOW CHARACTERISTICS; FLOW DISTRIBUTION
Author: Ki-Hyeon Sohn
Publisher:
Published: 1998
Total Pages: 16
ISBN-13:
DOWNLOAD EBOOKAuthor: William J. McCroskey
Publisher:
Published: 1971
Total Pages: 52
ISBN-13:
DOWNLOAD EBOOKAuthor: Ralph John Volino
Publisher:
Published: 1995
Total Pages: 492
ISBN-13:
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Publisher:
Published: 2003
Total Pages: 24
ISBN-13:
DOWNLOAD EBOOKAuthor: Zhengping Zou
Publisher: Springer
Published: 2018-01-11
Total Pages: 572
ISBN-13: 9811057508
DOWNLOAD EBOOKThis 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.
Author: Daniel J. Dorney
Publisher:
Published: 1999
Total Pages: 30
ISBN-13:
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