流出道室速 的英文怎麼說
中文拼音 [liúchūdàoshìsù]
流出道室速
英文
rvot-
Computational fluid dynamics ( cfd ) techniques are used to study and understand fluid behavior in tunnels. by simulating complex specific operational cases, we can educe velocity or flux distribution in tunnel under different ventilation and resistance situation and determine the favorable operational procedures of the erlang mountain tunnel ventilation in a fire case. comparison has been made between a simulation and experiment for some cases in order to prove the cfd model is powerful, so that enables the study of cases for which experimental data is not available
採用本文將隧道內的氣流看成是理想流體的一維恆定流動，通過對二郎山特長公路隧道半橫向通風系統建立隧道內的空氣動力學模型，利用計算機進行數值分析與計算，得出發生火災時，不同通風阻力條件下隧道中的風速分佈及流量分佈，並通過實驗室隧道模型實驗進行驗證與修正，依據研究結果給出了二郎山半橫向通風隧道的火災控制方案，從而解決了二郎山公路隧道通風對火災的控制問題，同時為半橫向通風公路隧道的火災通風提供科學的方法。While the speed is very large, the fuel - air mixing behind the airstream is decreased and the span that the fuel flow in the second combustor is reduced, so the combustion efficiency is decreased, h ) if the fuel streams impinge with the airstreams directly at the air - inlet exit, it make against increasing the combustion efficiency, i ) increasing air - to - fuel ratio within proper range can increase the combustion efficiency
增加燃氣噴射速度有利於增強迴流區強度，頭部燃燒溫度上升，但速度太大則會減弱燃氣同空氣在進氣道下游的摻混燃燒，減少燃氣在室內停留時間，燃燒效率降低； 8燃氣射流與空氣流在進氣道出口直接撞擊不利於燃燒效率的提高； 9在適當范圍內增大空燃比能顯著提高燃燒效率。Fried man p ， stevenson w g ， bittl j ， et al. left main coronaryartery occlusion during radiofrequency catheter ablation of idio2athic outflow treat ventrcular tachycardia j. p a ce ， 1997 ， 20 ： 1 184
馬堅，王方正，余培禎，等.射頻消融治療起源於左室流出道的非持續性室性心動過速和頻發性室性早搏j .中華心律失常學雜志， 1999 ， 3 （ 2 ） 126 - 1296New york ( reuters health ) dec 20 - rapid viral testing for influenza a and b in febrile infants spares them additional testing in the emergency room, according to a report in the december issue of the pediatric infectious disease journal
12月20號，紐約（路透社健康版）報道，據一篇發表在12月出版的兒科傳染病雜志上的報告，在急診室中運用快速流感病毒檢測可避免對發熱嬰兒進行不必要的檢查。分享友人