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    An Approximate Time Domain Nonlinear Harmonic Method for Analyzing Unsteady Flows With Multiple Fundamental Modes

    Source: Journal of Turbomachinery:;2022:;volume( 144 ):;issue: 012::page 121002
    Author:
    Wang, Dingxi;Zhang, Sen
    DOI: 10.1115/1.4055266
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: In this article, a new hybrid time and frequency domain method called the approximate time domain nonlinear harmonic method is proposed for a robust and efficient analysis of turbomachinery unsteady flow with more than one fundamental mode. The proposed method combines the features of the nonlinear harmonic method and the time domain harmonic balance method. Unsteady flow components are grouped according to their fundamental frequencies and inter blade phase angles, and separate unsteady flow governing equations are constructed for each mode group. These mode groups are connected using the least squares method based Fourier transform. The proposed method is expected to be exact for a linear problem but approximate for a nonlinear problem. Three sets of analyses with increasing levels of difficulties are presented to demonstrate the validity and effectiveness of the proposed method by comparing it with the time domain harmonic balance method based on the almost periodic Fourier transform.
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      An Approximate Time Domain Nonlinear Harmonic Method for Analyzing Unsteady Flows With Multiple Fundamental Modes

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4288452
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    contributor authorWang, Dingxi;Zhang, Sen
    date accessioned2022-12-27T23:21:23Z
    date available2022-12-27T23:21:23Z
    date copyright9/15/2022 12:00:00 AM
    date issued2022
    identifier issn0889-504X
    identifier otherturbo_144_12_121002.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4288452
    description abstractIn this article, a new hybrid time and frequency domain method called the approximate time domain nonlinear harmonic method is proposed for a robust and efficient analysis of turbomachinery unsteady flow with more than one fundamental mode. The proposed method combines the features of the nonlinear harmonic method and the time domain harmonic balance method. Unsteady flow components are grouped according to their fundamental frequencies and inter blade phase angles, and separate unsteady flow governing equations are constructed for each mode group. These mode groups are connected using the least squares method based Fourier transform. The proposed method is expected to be exact for a linear problem but approximate for a nonlinear problem. Three sets of analyses with increasing levels of difficulties are presented to demonstrate the validity and effectiveness of the proposed method by comparing it with the time domain harmonic balance method based on the almost periodic Fourier transform.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAn Approximate Time Domain Nonlinear Harmonic Method for Analyzing Unsteady Flows With Multiple Fundamental Modes
    typeJournal Paper
    journal volume144
    journal issue12
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4055266
    journal fristpage121002
    journal lastpage121002_12
    page12
    treeJournal of Turbomachinery:;2022:;volume( 144 ):;issue: 012
    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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