消音器應用於散熱之探討

Investigation of the possible usage of a sound suppressor as a heat diffuser

林晉陽(Lin-Chin-Yang)

指導教授 ： 湯敬民

共同指導教授 ： 宛同

淡江大學/工學院/航空太空工程學系碩士在職專班/碩士(2018年)

https://doi.org/10.6846/TKU.2018.00157

摘要

本研究利用ANSYS Icepak針對板式熱交換器進行熱交換流場分析，
比較K200板式熱交換器、導流型消音器流道、圓錐形消音器流道三者所產生的紊流強弱多寡層度對熱交換效率之影響。
首先必須證明紊流強烈混合作用所產生的質量傳遞是否為影響熱交換效率的主要因素，分別列舉層流、紊流兩種流場相比較，結果顯示紊流動能、黏度比較高之流道擁有較佳之熱交換效率，接下來的研究方向為如何改善流道幾何形狀以增加紊流動能、黏度比。
研究過程中發現單純改變流道幾何形狀無法改善紊流動能耗損，最後針對K200板式熱交換器、導流型消音器流道、圓錐形消音器流道在強制對流下之散熱效率進行比較，研究指出導流型消音器流道所產生的紊流動能、黏度比優於其他兩者。

關鍵字

消音器 ； 紊流動能 ； 黏度比 ； 板式熱交換器

並列摘要

This study used ANSYS Icepak for heat exchange flow field analysis of plate heat exchangers.Compare the influence of the turbulence intensity and the degree of turbulence generated by the K200 plate heat exchanger, the flow-guiding muffler flow path and the conical muffler flow path on the heat exchange efficiency.
Firstly, it must be proved whether the mass transfer caused by the intense mixing of turbulent flow is the main factor affecting the heat exchange efficiency. The flow fields of laminar flow and turbulent flow are compared respectively. The results show that the flow path with higher turbulent flow energy and higher viscosity has For better heat exchange efficiency, the next research direction is how to improve the flow channel geometry to increase the turbulent flow energy and viscosity ratio.
During the research, it was found that simply changing the geometry of the flow channel could not improve the turbulent flow energy loss. Finally, the heat dissipation efficiency of the K200 plate heat exchanger, the flow-type muffler flow channel and the conical muffler flow channel under forced convection was compared. It is pointed out that the turbulent flow energy and viscosity ratio produced by the flow-through silencer flow passage are better than the other two.

並列關鍵字

Suppressor ； Turbulence Kinetic Energy ； Viscosity ratio ； Plate heat exchanger

參考文獻

[1] Bernhard, Robert J., Shape optimization of reactive mufflers,Noise Control Engineering Journal,27, 1, 10-17, 1986.

[2]Davis D. D.,Stokes J. M.,Moore D. and Steven L.,Theoretical and Experimental Investigation of Mufflers With Comments on Engine Exhaust Muffler Design, NACA Report 1192,1954.

[3]Davis D. D.,Jr. G. L. Steven,Moore Jr. D. and Stokes G. M., Theoretical and Measured Attenuation of Mufflers at Room Temperature without Flow, with Comments on Engine-Exhaust Muffler Design,NACA TN-2893, 1954.

[4]Gogate G.R. and M.L.Munjal,“Analytical and experimental aeroacoustic studies of open-ended three-duct perforated elements used in muffler,”Journal of Acoustic Society America, Vol. 97, No.5, 1995, pp. 2919–2927.

[5]Brand J. F.,Garcia P. and Wiemeler D.,“Surface Radiated Noise of Exhaust Systems–Calculation and Optimization with CAE,”Noise & Vibration Conference and Exhibition,Michigan,SAE Paper 2004-01-0407, 2004.