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    Thermohydrodynamic Seizure: Experimental and Theoretical Analysis

    Source: Journal of Tribology:;1998:;volume( 120 ):;issue: 001::page 8
    Author:
    J. Y. Jang
    ,
    M. M. Khonsari
    ,
    M. D. Pascovici
    DOI: 10.1115/1.2834196
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: An experimental apparatus was designed and tested to study the thermally induced seizure in bearing. The setup consists of a simple, unloaded journal bearing configuration which lends itself to useful physical interpretation without the complexities that are present in the control of flow rates and eccentricity in a loaded journal bearing in which the clearance would vary with time. The motor was fitted with a current limiter which stopped the motor when the torque exceeded a certain limit. Experiments revealed that with this particular system, the journal speed undergoes a significant reduction with time until the operation is halted by the current limiter, which signifies the occurrence of a seizure. The time of seizure is appreciably influenced by this behavior. A parallel theoretical analysis, which takes into account the speed variation with time, was developed. The analysis includes the derivation of the appropriate governing equations which involve the transient analysis of flow velocity, heat transfer, and thermomechanical expansion of the surfaces, together with the numerical solution. The results of the simulations compare favorably to those obtained experimentally both in trend and magnitude. Finally, general behavior of the system in terms of its time-to-seizure characteristic is illustrated through a series of parametric studies.
    keyword(s): Theoretical analysis , Thermohydrodynamics , Journal bearings , Flow (Dynamics) , Engines , Clearances (Engineering) , Bearings , Engineering simulation , Equations , Heat transfer , Transient analysis AND Torque ,
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      Thermohydrodynamic Seizure: Experimental and Theoretical Analysis

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/121231
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    contributor authorJ. Y. Jang
    contributor authorM. M. Khonsari
    contributor authorM. D. Pascovici
    date accessioned2017-05-08T23:58:01Z
    date available2017-05-08T23:58:01Z
    date copyrightJanuary, 1998
    date issued1998
    identifier issn0742-4787
    identifier otherJOTRE9-28674#8_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/121231
    description abstractAn experimental apparatus was designed and tested to study the thermally induced seizure in bearing. The setup consists of a simple, unloaded journal bearing configuration which lends itself to useful physical interpretation without the complexities that are present in the control of flow rates and eccentricity in a loaded journal bearing in which the clearance would vary with time. The motor was fitted with a current limiter which stopped the motor when the torque exceeded a certain limit. Experiments revealed that with this particular system, the journal speed undergoes a significant reduction with time until the operation is halted by the current limiter, which signifies the occurrence of a seizure. The time of seizure is appreciably influenced by this behavior. A parallel theoretical analysis, which takes into account the speed variation with time, was developed. The analysis includes the derivation of the appropriate governing equations which involve the transient analysis of flow velocity, heat transfer, and thermomechanical expansion of the surfaces, together with the numerical solution. The results of the simulations compare favorably to those obtained experimentally both in trend and magnitude. Finally, general behavior of the system in terms of its time-to-seizure characteristic is illustrated through a series of parametric studies.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThermohydrodynamic Seizure: Experimental and Theoretical Analysis
    typeJournal Paper
    journal volume120
    journal issue1
    journal titleJournal of Tribology
    identifier doi10.1115/1.2834196
    journal fristpage8
    journal lastpage15
    identifier eissn1528-8897
    keywordsTheoretical analysis
    keywordsThermohydrodynamics
    keywordsJournal bearings
    keywordsFlow (Dynamics)
    keywordsEngines
    keywordsClearances (Engineering)
    keywordsBearings
    keywordsEngineering simulation
    keywordsEquations
    keywordsHeat transfer
    keywordsTransient analysis AND Torque
    treeJournal of Tribology:;1998:;volume( 120 ):;issue: 001
    contenttypeFulltext
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