Download or read book Prediction of Characteristics of Two Dimensional Turbulent Wakes Under the Influence of Streamline Curvature and Zero Positive and Negative Pressure Gradients written by and published by . This book was released on 1996 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of Characteristics of Two Dimensional Turbulent Wakes Under the Influence of Streamline Curvature and Zero Positive and Negative Pressure Gradients written by Kameswara Rao Pappu and published by . This book was released on 1993 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.

Download or read book Paper written by and published by . This book was released on 1993 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Development of Steady and Periodic Unsteady Turbulent Wakes Through Curved Channels at Positive Zero and Negative Streamwise Pressure Gradients written by Jose John and published by . This book was released on 1993 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Development of Steady and Periodic Unsteady Turbulent Wakes Through Curved Channels at Positive Zero and Negative Streamwise Pressure Gradients Part 1 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The turbomachinery wake flow development is largely influenced by streamline curvature and streamwise pressure gradient. The objective of this investigation is to study the development of the wake under the influence of streamline curvature and streamwise pressure gradient. The experimental investigation is carried out in two phases. The first phase involves the study of the wake behind a stationary circular cylinder (steady wake) in curved channels at positive, zero, and negative streamwise pressure gradients. The mean velocity and Reynolds stress components are measured using a X-hot-film probe. The measured quantities obtained in probe coordinates are transformed to a curvilinear coordinate system along the wake centerline and are presented in similarity coordinates. The results of the steady wakes suggest strong asymmetry in velocity and Reynolds stress components. However, the velocity defect profiles in similarity coordinates are almost symmetrical and follow the same distribution as the zero pressure gradient straight wake. The results of Reynolds stress distributions show higher values on the inner side of the wake than the outer side. Other quantities, including the decay of maximum velocity defect, growth of wake width, and wake integral parameters, are also presented for the three different pressure gradient cases of steady wake. The decay rate of velocity defect is fastest for the negative streamwise pressure gradient case and slowest for the positive pressure gradient case. Conversely, the growth of the wake width is fastest for the positive streamwise pressure gradient case and slowest for the negative streamwise pressure gradient. The second phase studies the development of periodic unsteady wakes generated by the circular cylinders of the rotating wake generator in a curved channel at zero streamwise pressure gradient. Instantaneous velocity components of the periodic unsteady wakes, measured with a stationary X-hot-film probe, are analyzed by the ph...

Download or read book Masters Theses in the Pure and Applied Sciences written by Sade H Shafer and published by Springer Science & Business Media. This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cited in Sheehy, Chen, and Hurt . Volume 38 (thesis year 1993) reports a total of 13,787 thesis titles from 22 Canadian and 164 US universities. As in previous volumes, thesis titles are arranged by discipline and by university within each discipline. Any accredited university or college with a grad

Download or read book Characteristics of a Turbulent Wake Under Gradient Flow Conditions written by L. N. Uhkhanova and published by . This book was released on 1968 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are given of experimental studies of turbulent wakes in the plane and axisymmetric cases under positive and negative longitudinal pressure gradients and an approximate method of calculating such wakes is discussed. A positive longitudinal pressure gradient promotes more rapid decay of a turbulent wake than in the zero gradient case, whereas the opposite is true for a negative pressure gradient. (Author).

Download or read book Two Dimensional Turbulent Wakes written by Canada. Defence Research Board. Reprints and published by . This book was released on 1966 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equations of mean motion indicate that two-dimensional turbulent wakes, when subjected to appropriately tailored adverse pressure gradients, can be self-preserving. An experimental examination of two nearly self-preserving wakes is reported. Mean velocity, longitudinal and lateral turbulence intensity, intermittency and shear stress distributions were measured and compared with Townsend's data from the small-deficit undistorted wake. In comparison with the undistorted case, the present wakes have slightly lower turbulent intensities and significantly lower shear stresses, all quantities being nondimensionalized by a local velocity scale taken as the maximum mean velocity deficit. A consideration of the reasons for the shear stress reduction leads to an expression from which the shear stresses in any symmetrical free equilibrium shear flow can be found. This relationship is used to calculate the rate of growth in the measured wakes, with reasonable success. (Author).

Download or read book Proceedings of the ASME Fluids Engineering Division Summer Meeting written by American Society of Mechanical Engineers. Fluids Engineering Division. Summer Meeting and published by . This book was released on 2005 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Master s Theses Directories written by and published by . This book was released on 1994 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Download or read book A Study of the Development of Steady and Periodic Unsteady Turbulent Wakes Through Curved Channels at Positive Zero and Negative Streamwise Pressure Gradients Part 1 written by and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of Turbulent Boundary Layers and Wakes in Compressible Flow by a Lag Entrainment Method written by J. E. Green and published by . This book was released on 1973 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rapid method is presented for predicting the development of turbulent boundary layers and wakes taking account of the influence of the upstream flow history on the turbulent stresses. The method employs the momentum integral equation, the entrainment equation and an equation for the streamwise rate of change of entrainment coefficient. This last, developed from the equation for shear stress which Bradshaw, Ferriss and Atwell derived from the turbulent kinetic energy equation, explicitly represents the balance between the advection, production, diffusion and dissipation of turbulent kinetic energy. The application of the method to two-dimensional and axisymmetric flows is described, and it is shown how secondary influences on the turbulence structure such as longitudinal surface curvature, can be logically taken into account. Comparisons with experiment show that, for incompressible flow, the method is fully comparable comparable in accuracy with the best of the methods assessed at the Stanford Conference of 1968. For compressible flow, the accuracy of the method in flow at constant pressure is ensured by its derivation, but the available experimental data do not enable its accuracy in flows with strong pressure gradients to be assessed with any finality. (Author).

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Turbulent Near Wakes written by A. Prabhu and published by . This book was released on 1983 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is concerned with the analytical treatment of the flow in the near wake behind sharp trailing edges with a fully-developed zero-pressure gradient turbulent boundary layer just upstream of the trailing edge. The three cases considered are the flows behind two-dimensional, axisymmetric and infinitely-yawed sharp trailing edges. The principal limits that govern the near wake seem to be Square root of C sub f as it approaches 0 and Square root of C sub f x R sub sigma as it approaches infinity, where C sub f and R sub sigma are the skin friction in the upstream boundary layer and the Reynolds number based on shear layer thickness, respectively. This is the same limit as that for the local asymptotic analysis of a fully-developed turbulent boundary layer under zero pressure gradient at large Reynolds numbers. These limiting conditions lead to the governing equations for the inner and outer near-wake and a logarithmic variation of the velocity in the overlapping region. It is argued that the same limiting conditions also lead to a logarithmic variation of the centerline velocity in the near wake. Similarity solutions have been obtained for the governing equations of the inner and outer near-wakes. Limited comparisons with experiments for a two-dimensional flow show that the variation of the scales and profiles predicted agree reasonably well with experiments.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996-08 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Turbulent Wakes in Constant Streamwise Pressure Gradients written by Terrance Edwards Anderson and published by . This book was released on 1973 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional turbulent wakes in constant adverse and favorable pressure gradients were studied experimentally. The static and dynamic pressures through the wake were obtained with calibrated Pradtl-type pitot-static probes, and a computer program was written to extract from these data the velocity profiles, displacement thickness, momentum thickness, and the shape factor. This program further provides the turbulent shear coefficient, eddy viscosity, and Prandtl mixing length within the wake. A wind tunnel was designed specifically for this experiment and its construction details are included. (Modified author abstract).