臺灣博碩士論文加值系統

本研究之目標在於探討穿音速單級壓縮器流場特性。了解壓縮器之氣動力性能，發展建立軸流式壓縮器內流場的數值模擬能量以提供壓縮器研發設計之參考。
　 本研究係採用CFX-Tascflow計算軟體模擬單級壓縮器流場的變化。以NASA Stage 36為例，執行單級壓縮器流場計算先驗證STAGE及FROZEN兩種界面(Interface)模式對流場變化之影響及差別。模擬結果與NASA Stage 36實驗比對時，發現紊流模式使用STANDARD 模式，而界面模式採STAGE-STAGE較為準確。進而執行50%至100%設計點轉速的性能分析。在計算出來的模擬流場中可發現震波生成的位置、壓力、溫度及性能曲線變化趨勢等，大致符合單級穿音速軸流式壓縮器的氣動力特性。

The main purpose of this research to investigate the flow field characteristics of a transonic one-stage compressors. The understanding of gas dynamics in the compressors and developing the capability of using computational fluid dynamic method is useful to the design and analysis of an axial compressor.
In this study, the CFD software CFX-Tascflow is applied for solving the complex flow field in a compressor and examing its performance. The model is based on the NASA Stage 36 axial-flow transonic compressor. The influences and differences of two interface models, Stage and Frozen, on the internal flow variations in the single stage compressor are discussed. The comparison between experiment data of NASA Stage 36 and the results obtained by the Tascflow calculation indicated that, the numerical sinulation operated with the standard model and interface model STAGE-SATGE has the best agreement. Then the rotating speeds from 50 to 100 percent of design speed are tested for performance analysis. It concluded that, the position of shock wave, the trends of the pressure and the temperature and performance curved are in good accord with the gas dynamics characteristics in an axial-flow transonic compressor stage.

目錄

誌謝 ii
摘要 ii
ABSTRACT iii
目錄 iv
表目錄 vi
圖目錄 vii
符號說明 ix
1. 序論..........................................................................................................................1
1.1 前言 1
1.2 相關論文研究之回顧 4
2. 數值方法 8
2.1 統御方程式 ……………………….………………….......………………….8
2.2 紊流模式………………..............………………..………………………...14
2.2.1 標準 紊流模式……......……..…………………….………...…14
2.2.2 紊流模式.….......…..……………………….…………...15
2.2.3 紊流模式……..….......………………………..……………….16
2.3 數值方法……………….……….......……………………………………...17
2.3.1 數值通量的計算.................................................................................18
2.3.2 壓力與速度的耦合......………………………………….…………..20
3.物理模型與邊界條件.....….............................…..............………………….…….22
3.1 物理模型………………………………........……………………………...22
3.2 邊界條件……………………………........………………………………...22
3.3 級與級界面………………………….......….……………………………...24
4.結果與討論 29
4.1 NASA Stage 36轉子、定子單級流場驗證…….......……………………...29
4.1.1網格配置………....…………………….......…………………………29
4.1.2數值比對...…………….……………….......…………………………29
4.2 STAGE 36 單級壓縮器各轉速流場模擬結果與分析…......……..………30
4.2.1各轉速壓力變化比較...………….............………...…………………31
4.2.2溫度變化比較…...............……….............………………….……..…32
4.2.3效益變化比較........…………….............…………………..…………32
4.3流場分析……..……………….......…….………...…………………………33
5.結論........….........…….......……………….….…………………………….60
參考文獻.....................................................................................................................61
自傳……………………………............................………………………………….65

參考文獻

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