free air effect 中文意思是什麼
free air effect
解釋
自由空氣效應-
Result of numerical simulation shows that the grads of continuous phase " s velocities decreases with the presence of microbubble of which the diameter is 100 / / w, the profiles of air volume fraction in the boundary layers is similar to triangle or echelon, affected by interaction among the particle, there is a saturated air fraction, within the scope of saturated air fraction, increasing the air injection ratio can accrete the friction reduction ratio, under the condition of same air injection ratio, the free - steam velocity is larger, the effect of friction reduction is worse
計算結果表明，直徑為100 m的微氣泡能減小近壁面連續相的速度梯度；微氣泡在邊界層中的濃度分佈近似為三角形或梯形分佈；受粒子間相互作用的影響，存在一飽和濃度；減阻率隨噴氣量的增大而增大，直至飽和噴氣量，此後，增大噴氣量，壁面摩擦阻力變化不大；相同噴氣量下，來流速度越大，減阻率越低。 -
The mainland and hong kong closer economic partnership arrangement cepa came into effect on 1 january 2004. certain machinery - related items, which could be related to environmental protection equipment and systems e. g. parts of air - conditioning machines and washing, bleaching or dyeing machines, are eligible to enjoy duty - free access to the chinese mainland
根據中國內地與香港簽署並於2004年1月1日生效的《更緊密經貿關系安排》 （ cepa ） ，若干與環保設備及系統有關的機械相關項目，例如空調零件以及洗滌、漂白或染色機器，可按零關稅輸入內地。 -
The mainland and hong kong closer economic partnership arrangement ( cepa ) came into effect on 1 january 2004. certain machinery - related items, which could be related to environmental protection equipment and systems ( e. g. parts of air - conditioning machines and washing, bleaching or dyeing machines ), are eligible to enjoy duty - free access to the chinese mainland
根據中國內地與香港簽署並於2004年1月1日生效的《更緊密經貿關系安排》 （ cepa ） ，若干與環保設備及系統有關的機械相關項目，例如空調零件以及洗滌、漂白或染色機器，可按零關稅輸入內地。
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