高溫蓄熱器理論模擬; Theoretical Simulation in High Temperature Storage Heater

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题名:	高溫蓄熱器理論模擬;Theoretical Simulation in High Temperature Storage Heater
作者:	施廷潤;Ting-Ruen Shih
贡献者:	機械工程研究所
关键词:	風洞;高溫蓄熱器;wind tunnel;storage heater
日期:	2004-06-25
上传时间:	2009-09-21 11:46:10 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	高溫蓄熱器為高溫高速風洞設備一部份，實際試驗所需人力和花費不低，故有必要建立模擬能力，以降低吹試失敗的風險與成本。本文即建構一模擬工具，模擬前先輸入進氣閥開度變化，即可模擬在實際吹試過程中主要參數變化情況。經本模擬可知實際吹試過程中，蓄熱器內部壓力、壓力差、高壓儲氣槽壓力、蓄熱床出口之氣流溫度和蓄熱床溫度分佈，最後將模擬結果和前人實際吹試數據互相比對。在蓄熱器壓力模擬方面，模擬過程最大誤差約5 %。蓄熱床上下游壓力差模擬方面，穩態階段誤差不大，但在非穩態之建壓階段模擬結果不理想，準確度有待提升。高壓儲氣槽各模擬吹試結果和實際吹試結果比對，最大誤差約5 %，準確度佳。蓄熱床出口氣流溫度方面，模擬結果和實驗數據比對結果整體趨勢相同，比實際吹試溫度高20度，誤差不大。蓄熱床溫度分佈方面整體趨勢合理，但無相關實際試驗數據可供比對，模擬結果可作下一次蓄熱磚蓄熱之參考。本文建構之模擬工具除蓄熱床上下游壓力差模擬準確度不佳外，其他模擬結果和實際吹試之誤差不大。 High temperature storage air heater is a component of high temperature and high speed wind tunnel. It cost a lot and many people work on the wind tunnel tests. If we make the ability of simulation about wind tunnel tests, the cost will decrease. This research is to structure a simulation tool. Input the flow control valve opening data before simulating, and then to obtain the change of main parameter by simulating. By means of this simulation tool we could get information about SAH pressure、SAH pressure difference、air reservoir pressure、outlet air temperature and temperature distribution of cored brick. These simulating data are compared with experimental data to prove the accuracy. The maximum error of SAH pressure simulation is five percent. In pressure difference simulation, the accuracy in steady state is well. In the result of air reservoir simulations, the maximum error is about five percent. In air temperature, the simulation data matches the experimental one. The air temperature in simulating is higher than experimental one. The temperature distribution of the cored brick bed is reasonable, but, there is no related experimental data can be compared with. The result of the simulation could be a reference of the next heating. After compared with experimental data, the simulation data fits the experimental one except the pressure difference simulation.
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