臺灣博碩士論文加值系統

自動化充填設備是包裝食品常用的設備之一，當產品係固液混合時,因液體與固體的密度差異很大，因此在自動化充填過程中，如何讓固液比例維持在一定範圍，有相當難度，常導致固液混合產品的品質受到影響， 一般固液混合物的充填機，都有攪拌設備，如何設計才能使固液混合物比例均勻，是充填機設計的重要需求。
針對充填機攪拌設備之設計參數，本研究利用ANSYS FLUENT分析軟體模擬固液混合物的流場變化，以攪拌槽底部角度、攪拌槽出口直徑、攪拌葉片位置和攪拌葉片轉速為參數，再配合田口方法，分析液體流量與顆粒體積/液體流量比值之平均值及標準差，以標準差望小為目標，得到品質較佳的攪拌設備之設計。研究結果液體流量方面品質較佳的模型比原始模型平均值的標準差要降低7.4%，而顆粒體積/液體流量的比值，品質較佳的模型比原始模型平均值的標準差要降低78%，成功地找出可讓固液得以較均勻比例混合，較佳的攪拌設備設計參數，本研究提出的方法可運用在不同固液密度混合狀態。

Automatic filling is usually used in the equipment of packaging food. While products are mixed with solid and liquid by different density, it would be difficult to keep the mixture ratio in a desire rang, and cause the poor quality. Generally, the solid-liquid mixture of filling machines has equipped with stirred system. How to design the stirred system in a solid-liquid mixed filling machine to keep the radio uniformly is very important.
For the design parameters of stirred equipment, the simulation software ANSYS FLUENT is used to analyze the change of mixture flow field. The bottom angle and diameter outlet of stirred tank, the location and speed of stirred blade are selected as parameters. Following the Taguchi method, liquid flow rate and particle volume / liquid flow rate of average value and standard deviation are analyzed. With the standard deviation to be as smaller as better, quality mixing equipment could be improved. The result of example shows that the average standard deviation of liquid system only is 7.4% reduced from the original, and for the particle volume / liquid flow model the average standard deviation is 78% reduced from the original. So, the improvement of parameters s the solid-liquid mixing radio be more uniform. The method proposes in this study also could be applied to any specified proportion of solid-liquid density.

摘要............................................I
Abstract........................................II
誌謝............................................III
目錄............................................IV
圖目錄..........................................VI
表目錄..........................................X
第一章 緒論.....................................1
1.1研究背景與動機...............................1
1.2文獻回顧.....................................5
1.3研究目的及方法...............................7
1.4論文架構.....................................9
第二章 軟體模擬基本理論.........................11
2.1 基本理論....................................11
2.1.1 統御方程式 ................................11
2.1.2 離散化....................................13
2.1.3 運動粒子的方程............................13
2.1.4 密集離散相模型 (Dense discrete phase model).....14
2.1.5 紊流模式k-epsilon (2epn)..................15
2.1.6 SIMPLE演算法..............................16
2.2 GAMBIT前處理軟體............................16
2.3 ANSYS FLUENT分析軟體 ........................19
第三章 數值模擬方法與設定.......................25
3.1 SolidWorks軟體建立攪拌槽與攪拌葉片模型......26
3.2 GAMBIT軟體建立物理幾何模型..................30
3.3 ANSYS FLUENT分析軟體的基本設定..............34
3.4 網格收斂性分析..............................40
第四章 田口方法與模型建立.......................43
4.1 田口參數設計 ................................43
4.2 信號雜音比..................................43
4.3 參數的種類..................................46
4.4 直交表(Orthogonal array)....................50
4.5 變異數分析(ANOVA)...........................54
第五章 結果與討論...............................57
5.1 原始模型模擬結果分析 ........................57
5.2 田口實驗結果分析討論 ........................63
5.2.1 液體流量的田口實驗 ........................64
5.2.2 顆粒體積/液體流量的比值田口實驗...........68
第六章 結論與未來展望...........................74
6.1 結論........ ................................74
6.2 未來展望....................................75
參考文獻 ........................................76

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