Download or read book Investigation of Supersonic Diffuser Instability written by University of Southern California. Engineering Center and published by . This book was released on 1956 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation of the unstable flow through four different types of diffusers were made. These were a pitot type intake, an axisymmetric model with a center body, a ramp and a scoop intake. The pitot intake was unique in that its only instability was at low and zero mass flow, and was of the acoustic organ pipe type. The other intakes were characterized by a high frequency oscillation at low mass flows, and a more complex phenomenon, known as buzz, at higher mass flows. It is believed that all diffusers which have a surface ahead of the inlet will have these two types of oscillation present to some degree, and that they will be the form as described in this report.

Download or read book Preliminary Investigation of Supersonic Diffusers written by Arthur Kantrowitz and published by . This book was released on 1945 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: The deceleration of air from supersonic velocities in channels has been studied. It has become apparent that a normal shock in the diverging part of the diffuser is probably necessary for stable flow, and ways of minimizing the intensity of this shock have been developed. The effect of various geometrical parameters, especially contraction ratio in the entrance region, on the performance of supersonic diffusers has been investigated. By the use of these results, diffusers were designed which, starting without initial boundary layer, recovered 90 percent of the kinetic energy in supersonic air streams up to a Mach number of 1.85.

Download or read book Supersonic Diffuser Instability written by Charles Lee Dailey and published by . This book was released on 1954 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary Investigation of Effects of Combustion in Ram Jet on Performance of Supersonic Diffusers written by Albert H. Schroeder and published by . This book was released on 1948 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Analog Study of a Shock position Diffuser Control on a Supersonic Turbojet Engine written by David Novik and published by . This book was released on 1956 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of diffuser dynamics (for supercritical diffuser operation) and controlled engine dynamics on the diffuser control requirements of a supersonic turbojet engine were studied with the aid of an electronic analog. The investigation indicated that a pressure disturbance in the diffuser had only a small effect on engine speed, whereas a disturbance in engine speed had a large effect on diffuser pressure and could impose severe requirements on diffuser control response.

Download or read book Investigation of an Instability Phenomena Occurring in Supersonic Diffusors written by Leo Stoolman and published by . This book was released on 1953 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Solutions for Steady and Unsteady Oscillatory Flow about an Axi symmetric Inlet written by Richard W. Newsome and published by . This book was released on 1983 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unsteady, compressible, Reynolds-averaged Navier-Stokes equations were solved for the flow field about an external compression axi-symmetric inlet with a length to diameter ratio, L/D = 15.88, at Mach 2.0 and a Reynolds number based on diameter, ReD = 2.36 times 10 to the 6th power, operating in the near-critical and subcritical flow regimes. The near-critical solution reached a stable steady state while the subcritical solutions attained an unstable bounded oscillatory state, characterized by large amplitude pressure oscillations and traveling shock waves. This phenomenon is a result of a shear layer instability combined with a closed-loop feedback of reflected disturbances and the naturally occurring self-sustained oscillations are commonly known as buzz. Numerical results are given in terms of Mach contours, velocity field plots, pressure-time traces at selected stations, as well as mass flux and other mass-averaged quantities along the duct length. Comparison with experiment is also given. (Author).

Download or read book Experimental Investigations of Instability of Supersonic Flow about Cup shaped Bodies written by Raymond Edward Rose and published by . This book was released on 1966 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aerodynamic characteristics of spherical-segment cups, ranging from a disc to a hemisphere, and cylindrical cups, having different depths, have been investigated in supersonic flow. The supersonic flow about hemispherical cups and cylindrical cups of a particular depth was found to be very unstable. The instability was characterized by violent oscillations of the detached shock wave coupled with unsymmetrical mass spillage from the cavity. The flow and shock wave instability were studied in a wind tunnel by means of high-speed motion pictures, shadowgraphs, schlieren photographs, wave diagram analysis, and surface pressure measurements. The water analogy was also used to study the flow instability.

Download or read book On the Instability Phenomenon of Supersonic Intake Diffusers written by John Huk Sun Lee and published by . This book was released on 1962 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of an Instability Phenomena Occuring in Supersonic Diffusors written by Leo Stoolman and published by . This book was released on 1953 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Report Jet Propulsion Laboratory California Institute of Technology written by Jet Propulsion Laboratory (U.S.) and published by . This book was released on 1963 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phenomena in Supersonic Diffusers written by Heinrich Ramm and published by . This book was released on 1947 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical and Experimental Investigation of the Effect of Tunnel Walls on the Forces on an Oscillating Airfoil in Two dimensional Subsonic Compressible Flow written by A. E. Potter and published by . This book was released on 1956 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerodynamic Instability of Supersonic Intake Diffusers written by T. Yoshinaka and published by . This book was released on 1970 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Survey of Some Preliminary Investigations of Supersonic Diffusers at High Mach Numbers written by Edgar M. Jr Cortright and published by . This book was released on 1952 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1957 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Note written by and published by . This book was released on 1955 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: