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Thursday, April 23, 2020 | History

2 edition of A method for three-dimensional flow analysis in a rotor using a high speed digital computer found in the catalog.

# A method for three-dimensional flow analysis in a rotor using a high speed digital computer

Written in English

Subjects:
• Aeronautics

• Edition Notes

 ID Numbers Contributions Naval Postgraduate School (U.S.) Open Library OL25174881M

() Simulation of Three-Component Two-Phase Flow in Porous Media Using Method of Lines. Transport in Porous Media , () Projection methods for incompressible flow problems with WENO finite difference by: Offers hands-on experience with Big Data analysis in Hadoop using a high performance computing cluster. for senior and graduate students in the College of Engineering and Computer Science and the College of Science seafloor classification and feature detection, water levels and flow, hydrographic practice. Digital Photogrammetry. ANALYSIS AND DESIGN OF AC INDUCTION MOTORS WITH SQUIRREL CAGE ROTORS by Shine Ho University of New Hampshire, September, The traditional approach to modelling the AC induction motor revolves around the well-known equivalent "T" circuit model. In this approach, the direct connection from geometry to performance is by: 2. D. J. Dunn 3 WORKED EXAMPLE No. 1 Write down the basic dimensions of pressure p. SOLUTION Pressure is defined as p = Force/Area The S.I. unit of pressure is the Pascal which is the name for 1N/m2. Since force is MLT-2 and area is L2 then the basic dimensions of pressure are ML-1T-2 When solving problems it is useful to use a notation to indicate the MLT dimensionsFile Size: KB.

Flow measurement is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. The common types of flowmeters with industrial applications are listed below: a) Obstruction type (differential pressure or variable area).

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### A method for three-dimensional flow analysis in a rotor using a high speed digital computer by Donald L. Felt Download PDF EPUB FB2

A three-dimensional viscous flow analysis was used to identify the performance-enhancing features of the higher efficiency rotor and to provide guidance in the interpretation of the experimental.

Comparisons are also made with an analysis of the rotor and stator rows using the DERA S1–S2 method. The three-dimensional predictions show good qualitative agreement with measurements in all regions of the flow field.

Quantitatively the flow away from the hub region agreed the by: 3. Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository.

For more information, please [email protected] Recommended Citation Mathur, Sanjay R., "Three dimensional analysis of a rotor in forward flight" (). IEEE TRANSACTIONS ON MAGNETICS, VOL. 43, NO. 7, JULY 1 Analytical Modeling of Axial Air Gap Solid Rotor Induction Machines Using a Quasi-Three-Dimensional Method.

Unsteady Simulation of a Two-Stage Cooled High Pressure Turbine Using An Efficient Non-Linear Harmonic Balance Method Proceedings of ASME Turbo Expo Turbine Technical Conference and Exposition San Antonio, TXAuthor: Xiuquan Huang, Ding Xi Wang.

Computational Analysis of Multi-Rotor Flows Seokkwan Yoon1, Henry C. Lee2, rotor systems. Three-dimensional unsteady Navier-Stokes equations are solved using a spatially 5th order multi-rotors offer an advantage in lifting capacity because the size of a rotor is File Size: KB.

A Digital Computer Program for the Through-flow Fluid A method for three-dimensional flow analysis in a rotor using a high speed digital computer book in an Arbitrary Turbomachine using a Matrix Method By H.

Marsh Reports and Memoranda No. * July, Summary. A detailed description is given of the development of a computer program for analysing the flow.

@article{osti_, title = {A numerical investigation of transonic axial compressor rotor flow using a low-Reynolds-number {kappa}-{epsilon} turbulence model}, author = {Arima, T and Sonoda, T and Shirotori, M and Tamura, A and Kikuchi, K}, abstractNote = {The authors have developed a computer simulation code for three-dimensional viscous flow in turbomachinery based on the time-averaged Author: A method for three-dimensional flow analysis in a rotor using a high speed digital computer book, T.

Figure 3. Approach for creation of component geometries. The geometric shapes like cylinders, aerofoil and straight ducts can be generated through high level programming languages while linking its output to grid generation/flow simulation as discussed by r ().The disadvantage of this approach is of limited use and lacks graphic user interfaces for visualization of the by: 2.

Quantitative Flow Visualization of Three-Dimensional Flows. Pages A Digital Image Analysis System for High-Speed Filmed Injection Jets. Book Title Flow Visualization VI Book Subtitle Proceedings of the Sixth International Symposium on Flow.

A fully elliptic computational method for the analysis of steady viscous flow in high speed subsonic centrifugal compressor impellers with tip leakage, is presented. A generalised curvilinear, non-orthogonal grid is utilised and the timeaveraged Navier-Stokes equations are transformed and expressed in a fully conservative : A.

Tourlidakis. A high-speed three-dimensional flow visualization technique has been developed. The technique involves the generation of laser pulses at a high repetition A method for three-dimensional flow analysis in a rotor using a high speed digital computer book, which are subsequently converted to sheets of light and incrementally scanned across the flow field.

rotor blade with an initially rectangular planform and a supercritical airfoil. A The modification of both the tip planform and the airfoil BRIEF DESCRIPTION OF ANALYSIS Program ROT22 The earliest codes developed for calculating the high-speed flow over a rotor blade solved the transonic small disturbance equation (refs.

The ROT22 codeCited by: 6. Digital Terrain Analysis in Soil Science and Geology, Second Edition, synthesizes the knowledge on methods and applications of digital terrain analysis and geomorphometry in the context of multi-scale problems in soil science and geology. Divided into three parts, the book first examines main concepts, principles, and methods of digital terrain.

The continuing evolution of supercomputers is shifting the optimal trade off between computational costs and completeness of the mathematical model toward the solution of the full set of nonlinear conservation laws. During the last decade, the development of effective methods for solving the.

Srinivas Guntur and Niels N. Sørensen, A study on rotational augmentation using CFD analysis of flow in the inboard region of the MEXICO rotor blades, Wind Energy, 18, 4, (), (). The wind speed is usually measured using digital sampling and is averaged using one of the below methods: (1) The wind speed is measured in each second and after 10 min, digits are registered and their average reflecting min average of the wind speed and the consequent wind speed average in 1 h can be : M.M.

Shokrieh, R. Rafiee. "For two- and three-dimensional flow in a compressible medium, a simple relation is given by which, to a first approximation, the quantitative influence of compressibility upon the velocities and pressures can be understood in a clear manner.

In the application of this relation the distinct behaviors of two-dimensional and axially symmetric three-dimensional flow with increasing Mach number Cited by:   The CFD method that was used for solving flow field’s equation was validated by experimental data of NASA Rotor The results showed that the compressor with curved rotors had higher efficiency, rotor pressure ratio and stable operating range Cited by: 8.

This video lecture, part of the series Turbomachinery Aerodynamics by Prof., does not currently have a detailed description and video lecture title. If you have watched this lecture and know what it is about, particularly what Aerospace Engineering topics are discussed, please help us by commenting on this video with your suggested description and title.

Full text of "A method of predicting the performance of axial flow turbines using a digital computer to develop performance other formats. With the rotor structure ofturbopump, using a one-dimensional finite element method, considering the mass of shaft, gyroscopic effect and influence of shearing deformation,establishedtheone-dimensional rotor dynamics finite element model, calculated its six rank of the critical speed, and compared the gyroscopic effect and mass of shaft to the influence of the critical speed turbopump, and the Cited by: 1.

Get this from a library. Flow visualization VI: proceedings of the Sixth International Symposium on Flow Visualization, October, Yokohama, Japan. in Flow Visualization.- A Digital Image Analysis System for High-Speed Filmed Injection Jets.- Flows by Direct Simulation of Monte Carlo Method.- Three-Dimensional Computation of a.

COMPUTATIONAL ANALYSIS OF HIGH SPEED FLOW OVER A CONICAL SURFACE FOR AIR AS WORKING FLUID Khaled Alhussan Research Assistant Professor, Space Research Institute, King Abdulaziz City for Science & Technology, Saudi Arabia, P.O.

The project focusses on advanced 3D compressor blade design and has the potential to improve tip-clearance flow control at high loading by introducing different Author: O.

Burkhardt, W. Nitsche, M. Goller, M. Swoboda, V. Guemmer, H. Rohkamm, G. Kosyna. Three Dimensional Analysis of a Rotor in Forward Flight R.G. Rajagopalan, S.R. Mathur, Iowa State University May 6, Your Path: Home > Three Dimensional Analysis of a Rotor in Forward FlightCited by: B.P.

WILLIAMSANDR.D. FLACK FIGURE Straight-through labyrihth seal. Kostrzewsky(), suchforces cancause a rotor tobecomeunstable. Inanefforttoincludethefluid induced forces in rotordynamic analyses, many researchers have sought rotordynamiccoefficients for labyrinth seals. The accurate prediction of these rotordynamic coefficients for labyrinth seals is the subject ofthis.

AbstractIn this paper an algorithm for the optimization of excitation system of line-start permanent magnet synchronous motors will be presented. For the basis of this algorithm, software was developed in the Borland Delphi environment.

The software consists of two independent modules: an optimization solver, and a module including the mathematical model of a synchronous motor with a Author: Łukasz Knypiński.

Active flow control in the form of zero-mass-flux excitation was applied at the slat shoulder of a simplified high-lift airfoil to delay flow separation. The NASA Energy Efficient Transport (EET) supercritical airfoil was equipped with a 15% chord simply hinged leading edge slat and a.

By using traditional analysis methods in this field of engineering, commonly desired data representations such as bode, polar, orbit, full spectrum plots were able to be produced to a very high accuracy. Additional capabilities offered by this application are slow roll compensation, synchronous and sub-synchronous filtering, and true three Author: David L Baker.

Methods and systems are described for a system for obtaining information regarding a flow. These methods and systems comprise a signal generator configured to generate an alternating current signal at a carrier frequency and a transformer arranged to receive the generated signal, wherein the transformer and carrier frequency are selected so that the generated signal resonates at the carrier Cited by: Design and Analysis of Delta Wing Rotor.

Configuration. h 1, Karrothu V R Manikanta 2, 3, 4. Abstrac t: The Wing Rotor Configuration is a fine combination of innovation and creation of a new configuration which can perform the VTOL operation at a high speed.

In this, the wing configuration gets merged with the rotor. For information, write to the Society for Industrial and Applied Mathematics, Market Street, Philadelphia, PA SIAM Spectral methods involve seeking the solution to a differential equation in terms of a series of known, smooth functions.

system. Because of the scoops, the rotor system is a non axis symmetric three-dimensional system. Based on the structural characteristics of the centrifuge, the model has been simplified by the following assumptions. 1) Because the rotor is spinning at high-speed, the three-dimensional problem could be simplified to an axis.

Finite element technique has become a popular tool in rotordynamic analysis. Dy-namic studies of rotating machines are generally performed using, on the one hand, beam element models representing the position of the rotating shaft and, on the other hand, three-dimensional solid rotor-stator models.

A specific advantage of solid modelsCited by: 3. APPLICATION OF ROTOR DYNAMIC ANALYSIS FOR EVALUATION OF SYNCHRONOUS SPEED INSTABILITY AND AMPLITUDE HYSTERESIS AT 2ND MODE FOR A GENERATOR ROTOR IN A HIGH-SPEED BALANCING FACILITY Max M.

L’vov Siemens Westinghouse Power Corporation Westinghouse Blvd. Charlotte, NC @ Edgar J. Gunter RODYN Vibration. The algorithm is based upon a variable metric method presented by M.J.D. Powell and a quadratic programming method by R. Fletcher. VMACO is a non-linear program developed to calculate the least value of a function of n variables subject to general constraints (both equality and inequality).

Note presenting a general theory of steady three-dimensional flow of a nonviscous fluid in subsonic and supersonic turbomachines with arbitrary hub and casing shapes and a finite number of blades.

The equations obtained to describe the fluid flow on these stream surfaces show clearly the several approximations involved in ordinary two-dimensional by: Ground Resonance Analysis of Bearingless Rotor Dynamic Stability Based on Simplified Model Author / Creator: A Novel Flux-Weakening Structure of High-Speed Permanent Magnet Motor Based on the Soft Ferrite.

Wang, X.H. / Lin, X.Y Determination of TDC Using Digital Correlation Method for Linear Compressor. Peng, G.H. / Tang, M.S. / Zou, H. of a Three Dimensional (3D) Sound Field to reduce the noise of rotary compressors.

With the aid of the 3D Computer Graphics (CG) presentation, anyone can visualize the sound radiating behavior more realistically at a glance, and identifyAuthor: N.

Shige, Y. Okamoto, F. Minamibata, H. Itch, T. Inazuka, S. Fuzimoto. Development of a High Speed Solid Rotor Asynchronous element pdf (FEM) analysis. Although the calculation of the solid rotor is a complex three dimensional eddy current problem, the characteristics of the rotors are well estimated using 2D FEM tools.

The rotor end currents and the three.Three-Dimensional FEM Rotordynamics and the So-Called Centrifugal Softening of Rotors 5 Centrifugal stiffening is simply explained: discs and blades are stressed by tensile forces in their plane (along their axis for the latter) and this causes an increase of their natural frequency.

This. Recent years have seen a proliferation of single-molecule devices including rotors 1,2,3, motors 4,5,6,7,8,9,10 and switc12,13,14,15,16,17,18,19,20,However, a key step towards Cited by: 6.