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Monday, July 6, 2020 | History

2 edition of Analytical investigation of transient diffuser wave phenomena found in the catalog.

Analytical investigation of transient diffuser wave phenomena

by Kenneth Dean Aanerud

  • 297 Want to read
  • 17 Currently reading

Published .
Written in English

    Subjects:
  • Aeronautics

  • The Physical Object
    Paginationp. ;
    ID Numbers
    Open LibraryOL25326321M

    Laser generation/detection methods allow the investigation of ultrasonic transient phenomena in both space and time dimensions. Used for the experimental investigation of surface wave propagation along a two dimensional medium, laser ultrasonics leads to three dimensional (3D) space‐time signal collections. In order to extract the wave propagation information, the classical high resolution Cited by: 1. @article{osti_, title = {Analytical investigation of critical phenomena in MHD power generators}, author = {}, abstractNote = {Critical phenomena in the Arnold Engineering Development Center (AEDC) High Performance Demonstration Experiment (HPDE) and the US U Experiment, are analyzed. Also analyzed are the performance of a NASA-specified MW(th) flow train and .

    Supersonic wind tunnels are widely used in the survey of fluid flow behavior around flying vehicles. In the start stage which is occurring in a very short time interval in an unsteady and transient mode, some strong shock waves are formed who should rapidly pass the test section to be swallowed by the second throat of the supersonic diffuser. In otherwise, the normal shocks formed in the test. A transient lunar phenomenon (TLP) or lunar transient phenomenon (LTP) is a short-lived light, color or change in appearance on the surface of the term was created by Patrick Moore in his co-authorship of NASA Technical Report R Chronological Catalog of Reported Lunar Events, published in Claims of short-lived lunar phenomena go back at least 1, years, with some having.

    [20] Ben-Dor G., Shock Wave Reflection Phenomena, 2nd ed., Springer–Verlag, New York, , pp. 50– Google Scholar [21] Bachchan N. and Hillier R., “ Hypersonic Inlet Flow Analysis at Off-Design Conditions,” AIAA Paper , Aug. Link Google ScholarCited by: Poroelastodynamics: Linear Models, Analytical Solutions, and Numerical Methods Martin Schanz. Martin Schanz. On the Theory of Seismic and Seismoelectric Phenomena in a Moist Soil,” One-Dimensional Transient Wave Propagation in Fluid-Saturated Incompressible Porous Media,”Cited by:


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Analytical investigation of transient diffuser wave phenomena by Kenneth Dean Aanerud Download PDF EPUB FB2

Phenomenainvariousnozzle-shortdiffusercombinationsof interest togas dynamic program was based onthe techniquesdeveloped by GeorgeRudinger in hisbook, Wave Dia. Analytical investigation of transient diffuser wave phenomena. unsteady flow problem associated with starting phenomena in various nozzle-short diffuser combinations of interest to gas dynamic lasers.

The program was based on the techniques developed by George Rudinger in his book, Wave Diagrams for Nonsteady Flow in Ducts. The techniques Author: Kenneth Dean Aanerud. In the present work the transient behavior of ejectors is explored experimentally and numerically.

The main goal is to achieve an appropriate numerical model for predicting transient phenomena in ejectors. To validate the numerical results, an experimental test rig was built up and a set of experiments Cited by: Pressure Wave Analysis of Transient Flow in Pipe Distribution Systems By Don J.

Wood, Srinivasa Lingireddy and Paul F. Boulos First Edition:Hardback, pp. MWWD & IEMES Transient Response of Outfall Diffuser Hydraulics to Wave Action. Norman Lawgun. 1), Othman Seifeddine(2) Keywords: Transient analysis, outfalls, diffuser.

The current work presents a novel way to evaluate the interaction effects in a diffuser-augmented hydrokinetic turbine (DAHT) under the terms presented on the generalized actuator disc theory.

Logically, the discussion can be analyzed from three different angles: (1) the effect of the N-wave and the solitary wave on the relative wave energy distribution; (2) for the TS- or MS type N-waves, the effect of the LEN wave and the LDN wave on the relative wave energy distribution; and (3) for the LEN or LDN waves, the effect of the TS-type N-wave and the MS-type N-wave on the relative wave energy Cited by:   An analysis of these phenomena is presented.

In particular this paper discusses the conditions which can be influenced by the test bench (Measurement and Control) and defines a test procedure to verify the quality of the test results. Shock-Wave Oscillations in a Transonic Diffuser Flow.

A CFD analysis of the flow dynamics of a directly-operated safety relief valve. Nuclear Engineering and Design, Vol. Shock Wave Oscillation Phenomena Depending on Boundary Layer Conditions in Transonic by:   Numerical analysis of pseudo-shock flow diffusion phenomenon in variable cross-section ducts 1 December | Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Vol.No.

8Cited by: Book Description. This new edition covers a wide area from transients in power systems—including the basic theory, analytical calculations, EMTP simulations, computations by numerical electromagnetic analysis methods, and field test results—to electromagnetic disturbances in the field on.

Experimental and Numerical Investigation of Unforced unsteadiness in a Vaneless Radial Diffuser the transient analysis of both the stall inception (SI) and the surge onset (SO) was carried out. The analysis in Section presents the different instability trajectories from stable to unstable conditions at different rotating speeds, and detailed transient instability evolution process is worth investigating to obtain more information about the flow instability.

In this section, dynamic pressure signals measured by high-frequency-response probes (dynamic probes) are analyzed to investigate the instability Cited by: A series of experimental investigations are conducted to study the effects of casing treatment on steady and transient performance of the compressor.

Dynamic pressure is monitored under stable operating point and surge occurrence condition at following positions: two ends of the treated holes, 37%-chord impeller tip position and the vaneless by: Numerical analysis of bubble dynamics in the diffuser of a jet pump under variable ambient pressure Article in Journal of Hydrodynamics 29(3) June with 54 Reads How we measure 'reads'.

With steady-state calculations and additional transient CFD investigations in the normal operating conditions, the whole pump characteristics were calculated accurately. Two different types of mixed flow diffuser pumps were investigated—one equipped with adjustable impeller blades, the second one with comparable low specific : Stefan Höller, Helmut Benigni, Helmut Jaberg.

This method is capable of accurately simulating travelling-wave phenomena in transmission lines as well as the transient response of complex lumped and non-linear sub-networks to switching stimuli. Single-phase results of investigations utilising the methods described commence in Chapter 5.

3D numerical simulation of transient processes in hydraulic turbines Sergey Cherny 1, Denis Chirkov 1, Denis Bannikov 2, Vasily Lapin 1, Vladimir Skorospelov 3, Irina Eshkunova 1 and Alexander.

Experimental Investigation of Surge Phenomena in a Transonic Centrifugal Compressor Sasuga Ito, Sasuga Ito work is required not only to understand the unsteady behavior but to also validate the CFD used for more localized analysis and development of the understanding of the flow phenomena when operating near surge.

vaneless diffuser and. Mechanism of Shock Wave Oscillation in Transonic Diffusers. Analysis of shock wave unsteadiness using space and time correlations applied to shadowgraph flow visualization data.

Shock Wave Oscillation Phenomena Depending on Boundary Layer Conditions in Transonic by:. Moreover, the present study confirmed the existence of a stall pattern with two almost axisymmetric lobes. Finally, the transient analysis of both the stall inception (SI) and the surge onset (SO) was carried out, highlighting the flow field evolution in the diffuser under these by: 7.Investigation methods for analysis of transient phenomena concerning design and operation of hydraulic-machine systems A review Deyou Li et al-Coupling simulation of the fast startup of a centrifugal pump with cavitation in a closed-loop pipeline system Long Meng et al-This content was downloaded from IP address on 18/11/ at Cited by:   The flow structure and the unsteady mechanism of the unsteady cavitating flow are reviewed in this paper.

The flow patterns and structures in different cavitation regime, for the attached cavitation and the vortical cavitation, are shown with both the visualization and the quantitative information. The attached cavitating flow around the Clark-Y hydrofoil and the vortical cavitating flow Cited by: 9.