本研究主要針對β型史特靈引擎的菱形驅動結構進行設計製造與機構動態及熱流模擬,共設計並製作完成曲柄機構及菱形驅動結構之史特靈引擎各一台。首先,完成曲柄機構之設計製作,並測試出具較佳性能的曲柄機構史特靈引擎移氣器及動力活塞之位移曲線,並以之為目標函數,利用簡易式之共軛梯度法逆向決定出相應的菱形驅動結構的最佳幾何尺寸,進行加工製作。最後,則測試曲柄機構及菱型驅動結構兩台史特靈引擎的運轉性能。另外,熱流場數值模擬部分是利用熱流分析軟體FLUENT的動態網格的功能來進行;而機構動態模擬部分則是利用機構運動模擬軟體MSC. visualNastran Desktop來完成。本研究嘗試將熱流場模擬與機構動態模擬結合,探討史特靈引擎之熱力循環性能及分析結構力場分佈,並使用最佳化設計法,逆向設計引擎最佳化尺寸,建立菱形驅動結構設計技術。 關鍵字:史特靈引擎、熱流場模擬、動態模擬、最佳化設計、菱形驅動結構
The research mainly study mechanism design and thermal fluid analysis of β type Stirling Engines using rhombic drive, we have designed and manufactured rhombic drive and crank mechanism of Stirling Engines each one. First of all, we finished the design of Stirling Engine using crank mechanism, and getting objective function from choosing Stirling Engine using crank mechanism with better performance to get displacement curve of displacer and piston. Using simplified conjugate-gradient method to design the dimensions of Stirling Engines using rhombic drive. Finally, we tested the operation performance of the two Stiring engine using crank mechanism and rhombic drive. In addition, the part of numerical simulation of thermal fluid is using the dynamic mesh of FLUENT and dynamic simulation of mechanism is using MSC. visualNastran Desktop to accomplish. This research tries to combine thermal fluid analysis and dynamic simulation of mechanism to study Stirling cycle and set up the technique of Stirling Engine using rhombic drive . Key word: Stiring engine, thermal field simulation , dynamic simulation , optimization design , rhombus drive