臺灣博碩士論文加值系統

過去二十年來，學術界和工業界一直在進行滾動活塞式壓縮機的實驗研究，然而大多數實驗強調熱力學性質，例如出口壓力、入口和出口之間的溫度或焓差，以及對冷卻劑等的工作。可能影響壓縮效率卻還有其他因素，例如：活塞體積變化、入口角度變化及閥門質量變化都有可能會影響壓縮機效率，因此把滾動式活塞壓縮機透過三維的模擬結果與實驗壓縮機進行效率比較。
透過活塞體積變化、入口角度變化及閥門質量變化三種模型最佳化設計與模擬的結果顯示，發現活塞體積中的冷媒會受到壓縮空間的影響而壓縮機效率會有所變化，入口角度變化中的冷媒會受到通道縮短影響然壓縮機效率，閥門質量變化中的冷媒會受到閥門重量的影響而壓縮機效率會有所變化，把三種最佳化壓縮機模擬結果與實驗壓縮機進行效率比較可得知實驗壓縮機為最佳化。
對於未來進行壓縮機設計可透過模擬提前得知壓縮機運轉後的結果在進行壓縮機測試上可避免許多失敗使得壓縮機的效率達到最好。

For the past two decades, academia and industry have been conducting experimental studies for rolling piston type compressors. However, most of these experiments put emphasis on thermodynamic properties such as outlet pressure, temperature or enthalpy difference between inlet and outlet, as well as the works on coolants. But, there are other factors that may affect the efficiency of compression; for instance, changes in piston volume, inlet angle and mass of valve may all have impact on the efficiency of the compressor. Therefore, I aimed to compare the results gained through three-dimensional simulation of a rolling piston compressor with those of the experimental compressor.
According to the results acquired from the simulation of the three optimized models of piston volume, inlet angle and mass of valve, the coolant in the piston volume was affected by the compression space, which further influenced the efficiency of the compressor. The coolant in the inlet angle difference had impact on the compressor efficiency due to the shortening of channel. The coolant in the mass of valve difference was affected by the weight of the valve, which therefore led to the changes in the compressor efficiency. By comparing the results of the simulations of the three optimized compressors with the experimental compressors, it may be concluded that the experimental compressors are the best.
For the design of compressor in the future, it is advisable to obtain the results of the operation of the compressor in advance through simulation, so as to avoid many failures during the tests on compressor and to achieve the best efficiency of the compressor.

摘要 i
Abstract ii
目錄 iii
表目錄 v
圖目錄 vi
符號說明 xviii
第一章 緒論 1
1.1前言 1
1.2研究背景 1
1.3文獻回顧 2
第二章 數值方法 6
2.1計算流體力學簡介 6
2.1.1CFD軟體簡介 6
2.1.2有限體積法(Finite Volume Method) 6
2.1.3離散化(Discretization) 7
2.1.4紊流模型 9
2.2數值模擬 11
2.2.1壓縮機零件說明 12
2.2.2入口網格配置 13
2.2.3汽缸網格配置 14
2.2.4月牙欠缺網格配置 14
2.2.5通道網格配置 14
2.2.6排放閥網格配置 15
2.2.7出口網格配置 15
2.2.8網格交互面配置 16
2.2.9壓縮機觀測點與剖面取樣建立 17
2.3壓縮機模型變化 19
2.3.1壓縮機體積之大小變化 19
2.3.2壓縮機入口角度之變化 21
2.3.3壓縮機閥門質量之變化 21
2.3.4設定邊界及初始條件 22
2.3.5設定時間步階 22
第三章 模擬規劃與驗證 23
3.1網格獨立性 23
3.2壓縮機模擬規劃 24
3.3實驗與結果分析 24
3.3.1實驗結果驗證 24
第四章 設定參數與模擬結果 33
4.1體積變化 34
4.1.1體積增加之汽缸與排放閥流場壓力剖面分佈 34
4.1.2體積增加之汽缸與排放閥流場溫度剖面分佈 48
4.1.3體積增加之數據分析 61
4.1.4體積增加之出入口焓與冷媒所獲得功分析 67
4.1.5體積增加之流線圖 69
4.1.6體積減少之汽缸與排放閥流場壓力剖面分佈 71
4.1.7體積減少之汽缸與排放閥流場溫度剖面分佈 84
4.1.8體積減少之數據分析 97
4.1.9體積減少之出入口焓與冷媒所獲得功分析 102
4.1.10體積減少之流線圖 107
4.2入口角度變化 110
4.2.1入口角度變化之汽缸與排放閥流場壓力剖面分佈 110
4.2.2入口角度變化之汽缸與排放閥流場溫度剖面分佈 123
4.2.3入口角度變化之數據分析 137
4.2.4入口角度變化之出入口焓與冷媒所獲得功分析 142
4.2.5入口角度變化之流線圖 146
4.3閥門質量變化 149
4.3.1閥門質量變化之汽缸與排放閥流場壓力剖面分佈 149
4.3.2閥門質量變化汽缸與排放閥流場溫度剖面分佈 162
4.3.3閥門質量變化之數據分析 176
4.3.4閥門質量變化之出入口焓與冷媒所獲得功分析 182
4.3.5閥門質量變化之流線圖 186
第五章 結論 190
參考文獻 191
附錄 192

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