laminar displacement 中文意思是什麼
laminar displacement
解釋
薄層位移- laminar : adj. 由薄片或層狀體組成的，薄片狀的；層狀的。 laminar flow 【物理學】片流，層流。
- displacement : n 1 轉位，移動；取代，置換；（人的）流離失所。2 撤換，免職。3 【機械工程】（活塞）排氣量；【航海...
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In the thesis the low drag - low noise optimization of the vehicle main form design is realized, main accomplishments are as follows. researched the knowledge of drag and flow noise, the parameters of the boundary layer are calculated by the hess - smith method and boundary layer momentum integral method. the calculation of the length of transition zone and change in boundary layer displacement thickness between laminar and turbulent states in the transition is improved, then the drag coefficient and self - noise from the transition zone are calculated as the objective functions of the optimization
主要研究內容和成果如下：對航行器繞流流場進行分析，深入研究了阻力和流噪聲產生機理，建立了阻力系數和自噪聲的評估數值計算模型；採用物面分佈源匯法和邊界層動量積分法對繞流流場的流體動力參數進行計算，改進了轉捩區長度和邊界層位移厚度的計算，應用於航行器頭部駐點自噪聲的計算；最後設計了阻力系數和自噪聲數值計算程序模塊。 -
A two - dimensional double diffusive laminar mixed convection, displacement ventilation, is fully investigated by the means of heat and contaminant transport structures to see the effects of the heat and pollutant sources and the external mechanical ventilation
作者以二維層流雙擴散混合對流模型? ?置換通風? ?進行了數值模擬與分析，並利用上述對流可視化技術來觀察熱源、污染源、外部機械通風三個因素對室內空氣環境的影響。
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