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3 edition of Experimental rotordynamic coefficient results for honeycomb seals found in the catalog.

Experimental rotordynamic coefficient results for honeycomb seals

David Alan Elrod

Experimental rotordynamic coefficient results for honeycomb seals

by David Alan Elrod

  • 373 Want to read
  • 32 Currently reading

Published by Turbomachinery Laboratory, Mechanical Engineering Dept., Texas A&M University, National Aeronautics and Space Administration, National Technical Information Service, distributor in College Station, Texas, [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Mechanical engineering.

  • Edition Notes

    Statementprepared by David A. Elrod, research assistant and Dara W. Childs, professor of mechanical engineering.
    SeriesNASA contractor report -- 182440., NASA contractor report -- NASA CR-182440.
    ContributionsChilds, Dara W., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15400153M

    In this paper, a novel experimental seal test rig was introduced. An improved impedance method based on unbalanced synchronous excitation method to identify the rotordynamic coefficients of labyrinth seals was set up. The rotordynamic coefficient test is implemented near the cylinder resonance frequency to enlarge the influence of seal by: 6. [1] , , “Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients; Comparisons to Labyrinth and Smooth Configurations,” Journal of Tribology., , pp [2] Soto E, Childs D. , “Experimental rotordynamic coefficient results for (a) a labyrinth seal .

    Experimental results for the rotordynamic stiffness and damping coefficients of a labyrinth -rotor honeycomb-stator seal are presented. The coefficients are compared to the coefficients of a labyrinth-rotor smooth-stator seal having the same geometry. The objective of this work was to determine the effects of the operational conditions (as shown in this paper) and geometric parameters [as shown in Part 2 (, “Labyrinth Seal Rotordynamic Characteristics Part II: Geometrical Parameter Effects,” Journal of Propulsion and Power, Vol. XXX, No. XXX, , pp. XXX–XXX)] on the leakage and rotordynamic characteristics of Cited by: 4.

    A comparison of experimental and theoretical results for rotordynamic coefficients of four annular gas seals. A comparison of theoretically predicted and experimentally obtained data for smooth and honeycomb seals is provided. A short discussion on seal theory is included, and various rotordynamic coefficient identification schemes are. Kwanka, M. Nagel, Experimental rotordynamic coefficients of short labyrinth gas seals, Rotordynamic Instability Problems in High-Performance Turbomachinery, NASA Author: YücelUgur.


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Experimental rotordynamic coefficient results for honeycomb seals by David Alan Elrod Download PDF EPUB FB2

Get this from a library. Experimental rotordynamic coefficient results for honeycomb seals. [David Alan Elrod; Dara W Childs; United States. National Aeronautics and Space Administration.]. Experimental Rotordynamic Coefficient Results for (a) a Labyrinth Seal With and Without Shunt Injection and (b) a Honeycomb Seal | Journal of Engineering for Gas Turbines and Power | ASME Digital Collection.

Article by:   Experimental Rotordynamic Coefficient Results for: (a) A Labyrinth Seal With and Without Shunt Injection and (b) A Honeycomb Seal Elias A. Soto A., Elias A. Soto : A A Elias Soto, Dara W. Childs. Test results (leakage and rotordynamic coefficients) are presented for seven honeycomb-stator smooth-rotor seals.

Tests were carried out with air at rotor speeds up to 16, cpm and supply pressures up to bars. Test results for the seven seals are compared, and the most stable configuration is identified based on the whirl frequency : David A.

Elrod and Dara W. Childs. Experimental rotordynamic coefficient results for: (a) a labyrinth seal with and without shunt injection and (b) a honeycomb sealAuthor: Elias Antonio Soto Azuaje.

Discussion of ‘Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients: Comparisons to Labyrinth and Smooth Configurations’,” by by: Experimental rotordynamic coefficient results for (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal On the other hand, the honeycomb seal is better when PR > Experimental and theoretical rotordynamic stiffness coefficients for a three-stage brush seal Mechanical Systems and Signal Processing, Vol.

31 Comparison of Leakage Performance in Three Types of Gas Annular Seals Operating at a High Temperature (°C)Cited by: Theory Versus Experiment for the Rotordynamic Coefficients of Labyrinth Gas Seals: Part I—A Two Control Volume Model Joseph K. Scharrer Mechanical Engineering Department, Texas A&M University, College Station, Texas Cited by: Experimental investigation of rotordynamic coefficients for the labyrinth seals with and without shunt injection Article in Journal of Vibroengineering 17(8) December with 51 Reads.

Rotordynamic-coefficient and leakage test results are presented for three grooved seals with helix angles of 0°, 15°, and 30° against rotation.

The seals are mm long and mm in diameter. Tests were done for two supply pressures (up to 17 bars), three speeds (,and rpm), four pressure ratios, and three inlet fluid Cited by: 1. The experimental results reveal that all the seal rotordynamic coefficients increase with the rotational speed, and the inlet/outlet pressure ratio.

The shunt injection contributes to decreasing the seal cross-coupled stiffness, and increasing the direct by: 2. Experimental and theoretical rotordynamic stiffness coefficients for a three-stage brush seal Mechanical Systems and Signal Processing, Vol.

31 Comparison of Leakage Performance in Three Types of Gas Annular Seals Operating at a High Temperature (°C)Cited by: Experimental rotordynamic coefficient results for: (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal.

Master's thesis, Texas A&M University. Available electronically from http: / / / /ETD -TAMU -THESIS -S E. Soto and D. Childs, “Experimental rotordynamic coefficient results for (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal,” Journal of Engineering for Gas Turbines and Power, vol.no.

1, pp. –, Author: Dan Sun, Xudong Wang, Chengwei Fei, Huan Zhao, Guochen Zhang, Wenzhong Tang. Annular honeycomb seals: Test results for leakage and rotordynamic coefficients; comparisons to labyrinth and smooth configurations. ASME J Tribol ;– [3] Childs, D.W., Kleynhans, G.F.

Experimental rotordynamic and leakage results for short (l/d = 1/6) honeycomb and smooth annular pressure by: 4. The present paper presents experimental measurements of rotordynamic force coefficients for a multistage arrangement of four identical brush seals.

The bristles are metallic, with a lay angle of \(50^{\circ }\) from radial centerline and have an initial radial interference with the shaft of : Pascal Jolly, Olivier Bonneau, Mihai Arghir, Florent Cochain, Jérôme Dehouve.

The test results of sealing performance and a comparison between three types of honeycomb seals and a type of labyrinth seal are presented, which have different seal clearances and work under.

Soto EA, Childs DW () Experimental rotordynamic coefficient results for (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal.

Author: Wanfu Zhang, Qianlei Gu, Tengxi Wang. [6] E. Soto, D. Childs: Experimental rotordynamic coefficient results for (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal.

Journal of Engineering for Gas Turbines and Power, Vol. (), p DOI: /Author: Li Dong He, Jin Ji Gao. An experimental identification model of rotordynamic coefficients of seals using unbalanced synchronous excitation method Article (PDF Available) in Journal of .Experimental and theoretical rotordynamic stiffness coefficients for a three-stage brush seal Article in Mechanical Systems and Signal Processing August with 49 Reads.Experimental results presented in showed that the hybrid brush seal reduced leakage rates by about 30% in comparison with a conventional brush seal.

In this work, a three-stage brush seal with clearance is studied experimentally and theoretically to obtain rotordynamic stiffness coefficients as well as Cited by: