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Tuesday, May 5, 2020 | History

2 edition of High-speed laser anemometer system for intrarotor flow mapping in turbomachinery found in the catalog.

High-speed laser anemometer system for intrarotor flow mapping in turbomachinery

J. Anthony Powell

High-speed laser anemometer system for intrarotor flow mapping in turbomachinery

by J. Anthony Powell

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  • 31 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Laser Doppler velocimeter.,
  • Turbomachines -- Aerodynamics.

  • Edition Notes

    StatementJ. Anthony Powell, Anthony J. Strazisar, and Richard G. Seasholtz.
    SeriesNASA technical paper -- 1663.
    ContributionsStrazisar, Anthony J., Seasholtz, Richard G., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., Lewis Research Center.
    The Physical Object
    Pagination18 p. :
    Number of Pages18
    ID Numbers
    Open LibraryOL17827731M

    Example 2: High-Speed Turn-Milling of Ductile Steel [14] With the exception of aluminium and its alloys, one can notice that deeper investigations on high-speed machining of ductile materials, especially steels, have been omitted. In practice constructors often use harder steels just for reason to ensure the appropriate work pieceFile Size: KB. The electro-spindle was also tested in dynamic conditions during machining with high speed milling cutters of diameters in the range 1 to 6 mm. The system depicted in Fig mounted below the electro-spindle, provides the advance along axis x of the material under milling. The material under machining was a block of rapid prototyping resin Author: Guido Belforte, Federico Colombo, Terenziano Raparelli, Andrea Trivella, Vladimir Viktorov.

    which can meet the control requirement of the feed system of high-speed and high-acceleration machine tool. Key Words: High-Speed Machining, Nonlinear System, Feedforward Control, Trajectory Tracking /15/$ c IEEE High speeds are not only required in applications where a motor is used to drive a compressor, micromachining spindle or a mirror. More and more high-speed generators, with speeds of , rpm and beyond, are finding their way into gas turbines for stationary or mobile power generation, also called gas turbine generator systems.

    Mechanical Design. Quadratec is an Advanced Product Technology Engineering company involved in engineering product design, research/development and the design and manufacture of special purpose test/production equipment and instrumentation.   This uses high-speed machines that can directly drive, or be driven by a high-speed system such as turbine, compressor or other turbomachinery. This results in significant performance benefits, such as reduction in motor generator size, as well as reduced cost and simplified integration.


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High-speed laser anemometer system for intrarotor flow mapping in turbomachinery by J. Anthony Powell Download PDF EPUB FB2

High-speed laser anemometer system for intrarotor flow mapping in turbomachinery. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.

Intrinsically safe 4" high speed mechanical anemometer; Accurately measures accumulated air movement and speed. This first-class hand anemometer has wide appeal, providing the simplest and most reliable measurement of air movement. Rugged and Model: DI LASER ANEMOMETER SYSTPl The laser anemometer is a singlechannel, dual- beam system with on-axis backscatter light collection.

The LA system optical layout is shown in Fig. The laser lipht source is a W argon-ion laser operating at am. The beam crossing angle is degrees and the fringe spacing is vm. Laser anemometer surveys were made of the 3-D flow field in NASA ro a low aspect ratio transonic axial-flow fan rotor.

The test rotor has a tip relative Mach number of Figure 1 illustrates the LSCC impeller and the locations of laser-anemometer measurements. The upper part of Figure 2 shows results of velocity measurements taken at the percent meridional chord position, indicating the extent of the through-flow-velocity deficit characteristic of centrifugal-compressor flow fields.

This paper deals with the experimental quantification of the unsteady effects of the interactions between rotor and stator rows in high speed compressors. Due to the fact that the levels of the periodic fluctuations arising from the unsteady interaction may be low compared with the random fluctuations arising from the measurement uncertainties, it is crucial to minimize Cited by:   If the flow is not in the plane perpendicular to the optical system, the number of correlated impulses falls.

The 3D L2F utilizes this effect to obtain velocity information in three dimensions. Using two colors of a laser, a pair of focal volumes is generated for each beam displaced along the optical axis, as shown in Figure   To develop a quantitative understanding of unsteady and interacting turbomachine flow fields, it is necessary to quantify the instantaneous efficiency of high speed turbomachines.

This requires the measurement of both the unsteady velocity and total temperature variation in the exit flow of a high speed rotor. In this paper, techniques to utilize a single slant-film Cited by: 2. A laser-doppler anemometer was used to obtain flow-field velocity measurements in a pressure ratio, kg/s (10 lbm/s), centrifugal impeller, with.

Elliott's state-of-the-art, high-speed rotor balance facility features computer-aided balancing and one of the largest balancing chambers in the world, with an underground bunker and control room. The bunker chamber operates under vacuum which allows balancing of fully bladed rotors under running conditions.

During planned or unplanned maintenance, turbomachinery rotors are. High Speed Rotating Machinery One particular capability of Quadratec is the design and manufacture of high speed rotating equipment for a range of applications.

As the technology level behind many rotating machinery applications increases, this often results in increasing speeds, power requirements and rotor mass. The technical feasibility of high-speed gas bearings required for achieving high power densities in MEMS-based micro-turbomachinery has thus been experimentally demonstrated.

Description Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Cited by: Current issues regarding unusual conditions in high-speed turbomachinery.

DeCamillo S, Manager of Research and Development Kingsbury, Inc., Drummond Road, Philadelphia, PA, U.S.A. The hydrodynamic bearing is an extraordinary device. The idea of long-life turbomachinery that requires no oil or servicing is immediately attractive.

The concept of air-lubricated bearings provides the basis for such a design. This paper describes the advantages and problems in the application of air bearings to closed-and open-cycle machinery.

It diCited by: SET-UP system operated in back-scatter mode, a sufficiently high data rate The 3D-LDV system of the DLR Institute for Fluid Mechanics was required the f-number of the receiving optics to be as small as possible. operated in a back scatter; off-axis mode(IS). A 6 Watt argon-ion In this case a modified Schmidt-Cassegrain telescope with an.

The methods employed in shop balancing can have a profound impact on the resulting balance condition of the rotor. The impact of shop balance technique is most important when the rotor is relatively flexible and/or long as is common with most turbomachinery.

The article contains excerpts from the paper, “Rotor balancing tutorial” by Ray Kelm, Dustin. displacement machines. Attempts to bring advantages of turbomachinery such as oil free, low parts counts, low cost of manufacture, and reliability to low flow rate applications have not been sparse, but the principle difficulty has always been that the conventional tumachine design operates at ultra-high speed to rbo deliver low volume flow rates.

HIGH SPEED MACHINING (HSM) – THE EFFECTI VE WAY OF MODERN CUTTING Pasko, R. - Przybylski, L. & Slodki, B. Rafal Pasko Eng., Research assistant.

Lucjan Przybylski Prof. Eng., Cracow University of Technology, Production Engineering Institute, Al. Jana Pawla II 37, Cracow, Phone +48 12 01 30, Fax +48 12 20 File Size: KB.

Projects and Automation Solutions The Honeywell Turbine Control System is based on the Experion® Process Knowledge System (PKS) platform. Experion integrates process control with advanced solutions and services in an open system environment that increases safety, reliability, efficiency and security.

Cup anemometer (2) The rotational speeds of the cup anemometer were recorded for corresponding wind speeds (V) following these procedures: (2-A) The speed of the wind tunnel (V) was calculated using the following formula: V = *(counter reading) -where the counter reading is an indicator representing the rotational speed of the.

See the new ScanFlash high speed measuring machine from ESPI, powered by Metrolog X4 inspection software. Ideally suited to small parts that require high speed, high accuracy measurement, the.

Turbine overspeed events lead to costly and dangerous catastrophic failures. Therefore the overspeed system has to be periodically tested to ensure the system has the adequate response time to protect the turbines, plants and personnel. Below are excerpts from the paper, “Turbine overspeed systems and required response times” by Scott L Taylor of .High Speed explained simply: • In the early days of CNC tool paths, allowances for High Speed were limited to corner rounding or continuous pathing • The tool path intersection was altered via short corner, or rounding of intersection • This eliminated the stop at every intersection and.