Download or read book A Simple Criterion for Three dimensional Flow Separation in Axial Compressors written by Vai-Man Lei and published by . This book was released on 2006 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most modem blade designs in axial-flow compressors diffuse the flow efficiently over 20% to 80% of blade span and it is the endwall regions that set the limits in compressor performance. This thesis addresses the estimation, control and mitigation of three-dimensional separation near the hub corner in axial- flow compressors. A simple method to estimate the onset of hub comer separation in compressor blade passages has been developed. A parameter is defined to quantify the combined effect of adverse pressure gradient and secondary flow which are the two main mechanisms contributing to the formation of three-dimensional flow separation. There is a critical value of the parameter at which the onset of three-dimensional flow separation occurs. Data from existing research and production compressors show the generality of the separation criterion. The new parameter captures the alleviating effect of boundary layer skew on three-dimensional flow separation. Using this concept, a flow control scheme has been developed to mitigate hub comer separation by injecting spanwise momentum from the blade suction surface. A proof of concept flow control experiment demonstrates a reduction in stagnation pressure loss coefficient of 8% with an injection flow of 0.8% of the cascade mass flow.
Download or read book Measurement and Calculation of the Three dimensional Flow in Axial Compressor Stators with and Without End bends written by C. J. Robinson (Writer on compressors) and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Three dimensional Flow in Transonic Axial Compressor Blade Rows written by J. E. McCune and published by . This book was released on 1973 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamic Design of Axial flow Compressors written by Lewis Research Center and published by . This book was released on 1965 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Differential Analysis for the Turbulent Boundary Layer on a Compressor Blade Element including Boundary layer Separation written by James F. Schmidt and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-dimensional differential analysis is developed to approximate the turbulent boundary layer on a compressor blade element with strong adverse pressure gradients, including the separated region with reverse flow. The predicted turbulent boundary layer thicknesses and velocity profiles are in good agreement with experimental data for a cascade blade, even in the separated region.
Download or read book Three dimensional Incompressible Flow Solution of an Axial Compressor Using Pseudostream functions Formulation written by J. Z. Xu and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on considering the characteristic features of the momentum equations and meeting the requirement of the continuity, two pseudostream-functions are introduced. The principal equation of each pseudostream-function only contains the terms of its own second-order partial derivatives and does not include the second-order partial derivatives of another pseudostream-function. So the relation between the two equations are loosed considerablly and both equations may be solved separately. This property is valueful to obtain the convergent solution of flow field easily. The equations of the pseudostream-functions and the corresponding boundary conditions are given. Two incompressible flow examples show that this method may become a powerful tool in the aerothermodynamic analysis and design of a compressor.
Download or read book The Three dimensional Flow Field of an Axial Compressor Blade written by James Elliott McCune and published by . This book was released on 1958 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instrumentation Used in Measurement of the Three Dimensional Flow in an Axial Flow Compressor written by J. H. Horlock and published by . This book was released on 1957 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instrumentation Used in Measurement of the Three Dimensional Flow in an Axial Flow Compressor written by Norman Cyril Breddy and published by . This book was released on 1957 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Practical Engineering Solution of the Three Dimensional Flow in Transonic Type Axial Flow Compressors written by WALTER C. SWAN and published by . This book was released on 1958 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Three dimensional Flow and Blade Wake in an Axial Plane Downstream of an Axial Compressor Rotor written by P. Kool and published by . This book was released on 1978 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Three dimensional Flow Field of an Axial Compressor Blade Row written by James Elliott McCune and published by . This book was released on 1958 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Axial flow Compressors written by Ronald H. Aungier and published by American Society of Mechanical Engineers. This book was released on 2003 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a thorough description of an aerodynamic design and analysis systems for Axial-Flow Compressors. It describes the basic fluid dynamic and thermodynamic principles, empirical models and numerical methods used for the full range of procedures and analytical tools that an engineer needs for virtually any tupe of Axial-Flow Compressor, aerodynamic design or analysis activity. It reviews and evaluates several design strategies that have been recommended in the literature or which have been found to be effective. It gives a complete description of an actual working system, such that readers can implement all or part of the system. Engineers responsible for developing, maintaining of improving design and analysis systems can benefit greatly from this type of reference. The technology has become so complex and the role of computers so pervasive that about the only way this can be done today is to concentrate on a specific design and analysis system. The author provides practical methodology as well as the details needed to implement the suggested procedures.
Download or read book Three Dimensional Compressible Flow Through Highly Loaded Axial Compressor Blade Rows written by James E. McCune and published by . This book was released on 1976 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three-dimensional inviscid flows through axial compressor cascades have been analyzed both in rectilinear and annular geometry, using Beltrami flow concepts. Comparison has been made with experimental data available from the M.I.T. Blowdown Compressor Test Facility. Such comparison indicates strongly that certain three-dimensional effects included in this theory are actually present in the real flow and that these may be important in practical design and performance analyses. The new theory is linearized about the nonlinear mean flow, so that large, practical pressure ratios can be included in the analysis. Examples have been given to show that three-dimensional induced-velocity effects can be as important, in highly-loaded transonic ducted fans, as many other effects currently included in engine design codes. This 'quasi-linear' theory also has important implications regarding transonic compressor noise spectra.
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:
