臺灣博碩士論文加值系統

本研究主要探討的對象為隧道用軸流風機，以廠商所設計的葉片為基底，繪製出大小相同但葉片角度不同的七組3-D軸流風扇之外型，以及模擬風洞整體測試流道的邊界，改變不同壓差、轉速的邊界設定，藉由流機專業分析軟體FINE/Turbo進行CFD模擬分析，運用全多重網格技術與時間推進法進行求解，分析風扇整體流場的分佈，以及預測風扇性能曲線。
本研究以AMCA210-07標準之風洞進行風機性能驗證，進行數值分析與實驗數據的比對，除在大風量下誤差較大，其它顯示出的結果相當吻合，並以相似定律進行轉速改變時性能參數的換算，計算出在不同轉速下的風量與壓力，並以fineturb進行模擬與計算出的數據做比對，從模擬的結果驗證相似定律不僅能應用在推導公式上，其推導出的數據在數值模擬上也是相當準確的。最後，由各種不同葉片角度模型中進行數值模擬，從模擬結果中發現葉根與葉頂之角度越低則性能可相對提升，將此模擬分析結果作為葉輪機械設計與最佳化的參考依據。

The object of this study was to investigate the tunnel axial flow fan, manufacturers to design blades for the base. Draw the same size but the blade angle of seven groups of different 3-D shape of the axial fan, and wind tunnel simulation of the overall test flow boundary, change to a different pressure, speed of the boundary set.By a CFD simulation analysis is performed in this study with professional turbomachinery analysis software FINE/Turbo.Full multi-grid strategy and multistage Runge-Kutta are considered for computation. Analysis of the distribution of the fan the whole flow field, and prediction fan performance curve.
In this study, the AMCA 210-07 standard wind tunnel apparatus is used for the verification of fan performance. In addition to large errors in wind capacity under,the test results reveal reasonable agreement with those of the numerical ones.The similar law of the speed change performance parameters of the conversion, calculated at different speeds of air flow and pressure, and comparison to fineturb simulation and calculated data. From the simulation results verify the law of similarity can be applied not only on the derivation of the formula, the derived data on the numerical simulation is quite accurate. Finally, the blade angle from a variety of different models to simulate.From the simulation results found in the top of the blade root and leaf angle, the lower the relative performance can be improved. The results and data are then taken as the reference for the optimization of turbomachinery design.

目錄

中文摘要----------------------------------------------------------------------i
英文摘要---------------------------------------------------------------------ii
誌謝------------------------------------------------------------------------iii
目錄-------------------------------------------------------------------------iv
表目錄-----------------------------------------------------------------------vi
圖目錄---------------------------------------------------------------------vii
符號說明---------------------------------------------------------------------ix
第一章 緒論-----------------------------------------------------------------1
1-1 前言-----------------------------------------------------------------1
1-2 文獻回顧-------------------------------------------------------------1
1-3 研究動機-------------------------------------------------------------4
1-4 研究流程-------------------------------------------------------------4
第二章 風機原理與性能測試技術-----------------------------------------------7
2-1 風機理論------------------------------------------------------------------7
2-1-1軸流風機的特點-----------------------------------------------------------7
2-1-2軸流風機的構造-----------------------------------------------------------8
2-1-3 風機之特性--------------------------------------------------------------8
2-2 數值方法-----------------------------------------------------------------10
2-2-1 統御方程式-----------------------------------------------------------10
2-2-2 紊流模式-------------------------------------------------------------11
2-3 AMCA介紹-----------------------------------------------------------------13
2-3-1 AMCA風機性能測試介紹-------------------------------------------------13
2-3-2 AMCA測試風洞儀器-----------------------------------------------------17
2-4 風機性能計算方法---------------------------------------------------------18
第三章 模擬條件與軟體設定----------------------------------------------------21
3-1 模擬軟體介紹-------------------------------------------------------------21
3-2 前處理方法---------------------------------------------------------------23
3-3 計算網格-----------------------------------------------------------------24
3-4 邊界條件-----------------------------------------------------------------27
3-5 格點測試-----------------------------------------------------------------30
3-6 多重網格法---------------------------------------------------------------30
第四章 數值模擬結果-------------------------------------------------------34
4-1 模擬與實際比對-----------------------------------------------------------34
4-1-1 壓力場模擬-------------------------------------------------------------36
4-1-2 流量模擬---------------------------------------------------------------39
4-2 風機的相似定律-----------------------------------------------------------45
4-2-1 相似理論---------------------------------------------------------------45
4-2-2 轉速改變時性能參數的換算-----------------------------------------------45
4-2-3 模擬與實際量測比對-----------------------------------------------------49
4-3 變更葉片角度之性能分析---------------------------------------------------53
4-3-1 葉片角度的設計-------------------------------------------------------53
4-3-2 葉片角度的性能分析---------------------------------------------------54
第五章 結論與建議---------------------------------------------------------64
5-1 結論---------------------------------------------------------------------64
5-2 建議---------------------------------------------------------------------64
參考文獻---------------------------------------------------------------------66

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