- 會議論文
利用撓性物破壞噴嘴塊壯流之降噪研究
Study on Noise Reduction of Nozzle Block Flow Destroyed by Flexible Components
摘要
眾所皆知，高壓氣流通過噴嘴所產生的塊狀流乃噴嘴噪音的最大來源，本研究使用十字與網狀撓性物加於噴嘴出口處以破壞塊狀流，並透過彩色Schlieren技術將噴嘴氣流顯像，以進行降噪研究。實驗藉由調整十字型之線徑與網狀型之網目數以及兩者距離噴嘴口之距離等參數，找出降噪之最佳設計條件。由實驗結果得知，十字型線徑0.5mm，距離噴嘴出口0.5cm與1cm，其噪音值為83.8dB，降噪率約12.5 %，而網狀型100目距離噴嘴出口0.5cm，其噪音值為75.6dB，降噪率約21.1%。
並列摘要
It's well known, the high pressure flow running through the nozzle yields block flow which mainly causes the noise. This work used cross and mesh flexible components on the nozzle to destroy the block flow. Moreover, using color Schlieren technique to visual the noise reduction. Experiments adjusted conditions of and mesh flexible components for optimal design. The results show that wire diameter 0.5mm of cross flexible component, away from nozzle 0.5cm and 1cm received the noise of 83.8dB, the reducing rate was ca. 12.5%. The mesh 100 flexible component away from nozzle 0.5cm received the noise of 75.6dB, the reducing rate was ca. 21.17%.
延伸閱讀
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