Last edited by Yobei
Friday, July 24, 2020 | History

2 edition of Low speed, 2-D rotor/stator active noise control at the source demonstration found in the catalog.

Low speed, 2-D rotor/stator active noise control at the source demonstration

Low speed, 2-D rotor/stator active noise control at the source demonstration

under contract NAS3-26618

  • 359 Want to read
  • 32 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Active control.,
  • Noise reduction.,
  • Sound transmission.,
  • Far fields.,
  • Displacement.,
  • Cascade flow.,
  • Annular flow.,
  • Air flow.

  • Edition Notes

    StatementJohn C. Simonich ... [et al.].
    SeriesNASA contractor report -- 204149., NASA contractor report -- NASA CR-204149.
    ContributionsSimonich, John C., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18122480M

    An example of a potential Phase III product demonstration will be a high power microwave source such as a traveling wave tube with an integrated DEA cathode. The targeted frequency and power level should be in the range of X-band ( GHz) and ~10s KW which would be suitable for insertion into existing radar and/or directed energy systems. The techniqy of active noise control can certainly work in laboratory (Bloxsidge et al , Dowling , see References of Section 3, P.9), but manufacturers still prefer passive control as the ultimate solution for the design of lean combustors for vehicles, power plants as well as fighter jets fitted with afterburners.

    This book will also appeal to others within the aircraft industry who need an insight into electrical and electronic systems, e.g. pilots, engineering managers, etc. The book provides an introduction to the fundamentals of electrical, electronic and digital theory that underpins the principles of systems covered in the remainder of the book. Full text of "NASA Technical Reports Server (NTRS) Aeronautical engineering: A continuing bibliography with indexes (supplement )" See other formats.

    First the motor current is A or less. This makes the motor easier to wind and permits the use of printed circuit technology in the inverter. Second there is a major control benefit. An optimum control strategy is to use current-source PWM at low speed and voltage-source square wave at high speed. Demonstration of power tools and practice of utility items. Demonstration of advance power tools, pneumatic tools, electrical wiring tools and accessories. Making of electrical switchboard with 2 sockets and piano buttons and with electrical wiring. Any other item as per the requirement of college/Deptt./.


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Low speed, 2-D rotor/stator active noise control at the source demonstration Download PDF EPUB FB2

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Get this from a library. Low speed, 2-D rotor/stator active noise control at the source demonstration: under contract NAS [John C Simonich; United.

Low-Speed Fan Noise Reduction With Trailing Edge Blowing. The Active Noise Control Fan, located at the NASA Glenn Research Center, was used as the proof- of-concept test bed. LOW-SPEED. Turbofan Broadband Noise Prediction Using the Lattice Boltzmann Method The analysis is performed by considering a modified version of the Low-Noise configuration of the NASA Source Diagnostic.

Self-noise levels on submarines are illustrated in Fig. A and thebindyagency.com show average spectra and the increase of noise with speed. The spectra of Fig. A are for noisy, average, and quiet installations at a speed of 2 knots.

They approximate the levels of deep-water ambient noise at the high-frequency end, but they rise more rapidly with decreasing frequency, probably as a result of.

Numerical Study of 2-D Finlets Using RANS CFD for Trailing Edge Noise Reduction. Yuejun Shi and; Passive and Active Noise Control. Matthew Priddin, David I. Baker, Lorna Experimental Study of Slat Noise from 30P30N Three-Element High-Lift Airfoil in JAXA Kevlar-Wall Low-Speed Wind Tunnel. Mitsuhiro Murayama, Yuzuru Yokokawa, Hiroki Ura.

Clearly, various flow and noise control technologies are suitable for minor systems; however, this section will focus primarily on the major platforms and the issues associated with introducing flow and noise control systems into these platforms.

To close this section, a brief discussion of Cited by: Synergism of flow and noise control technologies. Progress in Aerospace Sciences, Meelan Choudhari. Download with Google Download with Facebook or download with email.

Synergism of flow and noise control technologies. Download. Synergism of flow and noise control technologies. epa / first report on status and progress of noise research and control programs in the federal government june volume 2 research panel reports the u. environmental protection agency office of noise abatement and control this document has been approved for general availability.

Cable Source Book ď ˇ Summer/Fall BCO is an Automated Systems Co. specializing in custom solutions for test'measurement and control thebindyagency.com Test Engineering group designs and integrates. Full text of "DTIC ADA Design Principles and Methods for Aircraft Gas Turbine Engines Les Principes et Methodes de Conception des Turbomoteurs" See other formats.

This banner text can have markup. Home; web; books; video; audio; software; images; Toggle navigation. Speed multiplication geartrain Large gear (many teeth) Small gear (few teeth) + high voltage AC voltage source low voltage many turns few turns high current Load 5 "Step-down" transformer + high torque low speed low torque high speed low current Figure Speed multiplication gear train steps torque down and speed.

(source: Nielsen Book Data) Aeroacoustics- Passive noise control by vane lean and sweep-Interaction of acoustic and vortical disturbances with an annular cascade in a swirling flow-Influence of mutual circumferential shift of stators on the noice generated by systems of rows stator-rotor-stator of the axial compressor-A frequency-domain.

Nov 19,  · Rotor-Stator-Systeme können ein- oder mehrstufig ausgebildet sein, als Beispiel wird hier eine zweistufige Dispergiermaschine gezeigt. Es handelt sich um ein Rotor-Stator-System mit zwei Zahnkränzen des Rotors, einem inneren und einem äußeren Zahnkranz.

Der innere Zahnkranz weist 4 Rotorzähne auf. Full text of "NASA Technical Reports Server (NTRS) A cumulative index to Aeronautical Engineering: A continuing bibliography, supplement " See other formats. Speed multiplication geartrain Large gear (many teeth) Small gear (few teeth) + "Step-down" transformer high voltage AC voltage source low voltage many turns few turns high current Load + high torque low speed low torque high speed low current Figure Speed multiplication gear train steps torque down and speed.

Robert J. McGhee and William D. Beasley, Low-Speed Aerodynamic Characteristics of a Percent-Thick Airfoil Section Designed for General Aviation Applications, NASA TN D, Decemberpp. Robert J. Pegg and David A. Hilton, Comparison of Acoustic Performance of Five Muffler Configurations on a Small Helicopter, NASA TN D, May Both tonal and broadband noise is produced.

We have developed a computational hybrid method that can be used during the design phase to predict the broadband interaction noise.

A low-order cascade response solution forms the backbone of the RSI (rotor-stator interaction) method that will be discussed. The main control systems in a modern wind turbine include pitch control, stall control (passive and active), yaw control, and others.

Under high wind speed conditions, the power output from a wind turbine may exceed its rated value. thebindyagency.com provides a medical RSS filtering service. Thousands RSS medical sources are combined and output via different filters.

This feed contains the latest items from the 'Journal of Sound and Vibration' source.Strojniški vestnik - Journal of Mechanical Engineering 62()1, The outcome of the general PTV algorithm is a state vector built from particle positions and velocities in the image domain.In the second part of this study, the tuned mass dampers are implemented experimentally on a laboratory mock-up.

The 2 d.o.f. TMD is realized with a cantilever beam equipped with two movable masses attached at its end. The active control is performed using 4 control stay cables equipped with piezoelectric actuators and force sensors.