查詢結果分析
來源資料
頁籤選單縮合
題名 | Investigation of a Constricted Annular Acoustic Resonator Part(Ⅰ)--Theory=截面積突縮環狀聲波共振器之研究(Ⅰ)--理論 |
---|---|
作者姓名(中文) | 林筱增; 蘭真; 侯光煦; | 書刊名 | 中正嶺學報 |
卷期 | 28:2 2000.03[民89.03] |
頁次 | 頁25-37 |
分類號 | 447.11 |
關鍵詞 | 截面積突縮; 環狀共振器; 特徵模態; Annular resonator; Constriction; Eigenmode; |
語文 | 英文(English) |
中文摘要 | 環狀熱聲原動機為目前熱聲學研究的一個主題,此研究之基礎為一截面積突縮環 狀共振器。本文提出此共振器之理論研究及數值分析。結果顯示,環狀共振器之特徵模態有 重疊現象,然而若將共振器部分截面積改變,可使其原有的縱向重疊模態分離成兩個不同頻 率之模態。這種頻率分離的現象可在其他領域中發現,其中頻率較高之模態在截面積突縮處 有一壓力反節點,而頻率較低之模態在截面積突縮處有一速度反節點,截面積突縮長度及開 展度改變對前者之影響較大。 |
英文摘要 | One topic of thermoacoustic research is an annular prime mover [1]. The starting point for this research is the investigation of a constricted annular resonator. The results of analytic and numerical investigations are presented in this paper. It is shown that the eigenmodes of an annular resonator are degenerative. However, introducting a constriction into an annular resonator splits each longitudinal duct mode into two modes, one at a higher frequency with a pressure antinode at the constriction and one at a lower frequency with a velocity antinode near the constriction. This frequency splitting phenomenon has been known in many different fields. The lower mode is more sensitive to changes in the length and porosity of the constriction than the higher mode. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。