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    Further Investigation on Acoustic Stall-Warning Approach in Compressors

    Source: Journal of Turbomachinery:;2019:;volume( 141 ):;issue: 006::page 61001
    Author:
    Dong, Xu
    ,
    Li, Fanyu
    ,
    Xu, Ruize
    ,
    Sun, Dakun
    ,
    Sun, Xiaofeng
    DOI: 10.1115/1.4041900
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A further investigation of an acoustic theory-based stall-warning approach is presented in this paper, which contains the basis of this approach and an application on a low-speed compressor (LSC) with a stabilization system. In the present work, this stall-warning approach is first explained through a numerical simulation in which the periodicity of pressure signals is analyzed, and then application experiments of this approach are actualized on a LSC with a stall precursor-suppressed (SPS) casing treatment (CT) as a stabilization system. For this stall-warning approach, a parameter named Rc is calculated through pressure signals of compressor to evaluate the periodicity of pressure signal, and statistical estimates are implemented on Rc so that the probabilities for Rc less than a threshold Rcth can be used as a criterion for stall warning. The numerical and experimental results both show that the signal resolution is determined by the sensor position, the prestall signal amplitude decreases rapidly with the increase of the distance between sensor and blades. Results also show that the probability increases significantly when the operating point is nearing the stall boundary. And at the same operating point, the probability value of Rc will decrease when the SPS CT is engaged. Through this stall-warning approach, a stabilization system based on SPS CT can be activated when the stall margin needs to be extended.
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      Further Investigation on Acoustic Stall-Warning Approach in Compressors

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    contributor authorDong, Xu
    contributor authorLi, Fanyu
    contributor authorXu, Ruize
    contributor authorSun, Dakun
    contributor authorSun, Xiaofeng
    date accessioned2019-03-17T09:35:42Z
    date available2019-03-17T09:35:42Z
    date copyright1/21/2019 12:00:00 AM
    date issued2019
    identifier issn0889-504X
    identifier otherturbo_141_06_061001.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4255565
    description abstractA further investigation of an acoustic theory-based stall-warning approach is presented in this paper, which contains the basis of this approach and an application on a low-speed compressor (LSC) with a stabilization system. In the present work, this stall-warning approach is first explained through a numerical simulation in which the periodicity of pressure signals is analyzed, and then application experiments of this approach are actualized on a LSC with a stall precursor-suppressed (SPS) casing treatment (CT) as a stabilization system. For this stall-warning approach, a parameter named Rc is calculated through pressure signals of compressor to evaluate the periodicity of pressure signal, and statistical estimates are implemented on Rc so that the probabilities for Rc less than a threshold Rcth can be used as a criterion for stall warning. The numerical and experimental results both show that the signal resolution is determined by the sensor position, the prestall signal amplitude decreases rapidly with the increase of the distance between sensor and blades. Results also show that the probability increases significantly when the operating point is nearing the stall boundary. And at the same operating point, the probability value of Rc will decrease when the SPS CT is engaged. Through this stall-warning approach, a stabilization system based on SPS CT can be activated when the stall margin needs to be extended.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleFurther Investigation on Acoustic Stall-Warning Approach in Compressors
    typeJournal Paper
    journal volume141
    journal issue6
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4041900
    journal fristpage61001
    journal lastpage061001-10
    treeJournal of Turbomachinery:;2019:;volume( 141 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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