隨著太空科技快速發展與任務需求日益多元，光學與紅外酬載對成像品質與熱穩定性的要求愈加嚴苛，為確保感測器維持在理想溫度範圍內穩定運作，主動式熱控系統扮演關鍵角色。於是能在有限體積內能夠提供高效率、低振動、可靠度高且可精準控制溫度的微型分置式史特靈致冷器成為熱控技術的重要元件。本研究開發一套混合數值分析法，結合熱力學理論模型與三維計算流體力學模型，建立雙向資料傳遞與模擬控制流程，整合兩者於計算效率與瞬時熱流場解析上的優勢，以提升整體模擬效率與準確性。在填充壓力30 bar與馬達轉速3000 rpm的條件下，僅耗時49小時41分鐘即完成三次交換週期並成功達成收斂標準，完成22,500個熱力循環與15個流體循環，平均每一交換週期約耗時16小時。相較之下，若單純採用三維計算流體力學模型進行求解，至少需耗時12,800小時才可達穩定週期。由此可見，本研究所開發之混合數值分析法可將計算時間大幅縮短逾250倍，不僅保留三維瞬態熱流場資訊，亦大幅提升模擬效率。

With the rapid growth of space technologies and increasingly diverse mission needs, optical and infrared payloads impose stringent requirements on image quality and thermal stability. To keep sensors operating within their allowable temperature ranges, active thermal control is essential. Within this context, a rotary split micro Stirling cryocooler, which offers high efficiency, low vibration, high reliability, and precise temperature regulation in a compact form factor, serves as a key element of spacecraft thermal management.
This study develops a hybrid numerical approach that couples a one dimensional thermodynamic model with a three dimensional computational fluid dynamics model. A bidirectional data exchange and simulation control framework is implemented to combine the rapid convergence of the thermodynamic model with the detailed thermo fluid resolution of the CFD solver, thereby improving overall accuracy and computational efficiency.
Under operating conditions of 30 bar helium charging pressure and a motor speed of 3000 rpm, the hybrid method completed three exchange loops and reached convergence in 49 hours 41 minutes. The run covered 22,500 thermal cycles and 15 fluid cycles, giving about 16 hours per exchange loop. By comparison, a stand alone 3 D CFD simulation is estimated to require more than 12,800 hours to attain a steady periodic solution. These results show that the proposed hybrid approach reduces the computation time by over 250 times while preserving the essential three dimensional thermo fluid details.

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