karman number 中文意思是什麼
karman number
解釋
卡曼數-
The method to determine von karman ' s constant with the integral equations was reviewed. the variation of von karman ' s constant in the overlap region was also analysed. a new conclusion was driven, that von karman ' s constant is a function of reynolds number or karman number in the overlap region
介紹了利用積分方程確定圓管湍流中馮?卡門常數的方法，並詳細分析了重疊區域中馮?卡門常數的變化情況，提出了馮?卡門常數在重疊區域中是雷諾數或卡門數函數的新結論。 -
The exhaust noise contains complex noise elements, including the exhaust noise with a base frequency measured in the number of exhausts in unit time, the resonance noise of the gas column in the pipe, the gas stream blowing noise at the exhaust manifold, the exhaust gas jetting and impact noise, the helmholtz resonance noise of the cylinder, the karman eddy noise and the turbulent noise inside the exhaust system
排氣噪聲包含了復雜的噪聲成分：以單位時間內排氣次數為基頻的排氣噪聲、管道內氣柱共振噪聲、排氣歧管處的氣流吹氣噪聲、廢氣噴注和沖擊噪聲、汽缸的亥姆霍茲共振噪聲、卡門渦流噪聲及排氣系統內部的湍流噪聲等。
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