曝光臺 注意防騙 網曝天貓店富美金盛家居專營店坑蒙拐騙欺詐消費者

turbulent boundary layers 湍流附面層 (⇒There is an intense agitation in turbulent layer.)
agitation n. ①攪動(作用), 搖動, 振蕩, 攪拌(作用), 攪勻, 拌和, 混合 ②激發, 激勵 ③擾動
exchange of mass or momentum 質量交換或動量交換
typical a. 典型的
macroscopic scale 宏觀尺度
packets of fluid 流體小包
turbulence viscosity 湍流粘性
eddy viscosity 渦粘性
as a consequence 作為結果
growth rate 增長率
separation of flow 流動分離
immensely ad. 無限地, 廣大地, 龐大地
(Pressure gradient is one of the factors that influences a flow immensely.)
retarding effect upon the flow 對流動的阻滯減速作用
favourable pressure gradient (negative pressure gradient) 順壓梯度
adverse pressure gradient (positive pressure gradient) 逆壓梯度
to separate the flow 使流動分離
counteract vt. 抵消; 阻礙; 中和; 使受挫
from this point onwards 從這點往后
reverse 倒流 （⇒The flow reverses.）
recirculating flow 回流
contour of the body 物體的外輪廓
point of separation 分離點
terminate v. 終止
reattach v. 再附（著）
separation bubble 分離氣泡
drag 阻力
skin friction drag 表面摩擦阻力
pressure drag or form drag 壓差阻力(形阻)
(Example sentences: There is another agent that can cause drag. This is the pressure difference upon the flow. This could come about due to geometrical effects that induce separation as happens with a cylinder to be discussed later. This is called Pressure Drag or Form Drag, since it is due to the body geometry. The sum of pressure drag and skin friction drag constitutes Drag about the body or Profile Drag.）
prone[prəun] a. ①易于…的, 有…傾向的(to) ②俯伏的, 面向下的 ③傾斜的, 陡的 (⇒be prone to error 易于出錯, prone bombing 俯沖轟炸)
readily prone for 易受
{⇒A thick body (large thickness/length ratio) is readily prone for separation and produces considerable pressure drag.}
bluff body （blunt body） 鈍體
apparent 明顯的
sphere 球體
periodic oscillation 周期性振蕩
wake 尾跡
the eddies break off from the cylinder 渦從柱體上脫落
vortex street 渦街
degeneration of vortices into turbulence 渦退化為湍流
dramatic change (戲劇性的, 引人注目的，奇跡般的)變化
sustain vt. ①支撐[承持] ②持續, 持久 {to sustain for a longer time 支撐更長時間}
dimples on golf ball 高爾夫球上的小凹坑
trip v. ①釋放, 松開, 撥動 ②(使)跳閘, (使)解扣
{⇒to trip turbulence in order to decrease drag 觸發附面層轉捩成湍流以減小（壓差）阻力 }
bowling 保齡球(運動)
bowlers 玩保齡球者；（板球）投手
cricket 蟋蟀，板球 vi 打板球
bowl [bəul] n.①碗，缽，盆 ②[量詞]一碗一缽③(草地滾木球用之)木球；保齡球 v.滾(球），投(球)
shin 攀，爬
delaying or stopping separation of flow 延遲或停止流動分離 54
strategy 策略
Figure： Flow Classification
viscous flow in pipes 管中的粘性流
external flow 外流
conduit 導管，油管，線管，水道
Internal flow: Pipe Flows and Open Channel Flows 內流：管道流和明渠流
（A pipe flow is one where the fluid fills the conduit completely. The main driving force is pressure although gravity may also be contributing to the flow. On the other hand, an Open Channel Flow is open where the fluid does not fill the conduit completely. The driving force now is gravity.)
turbulent flow 湍流流動
transitional flow 轉捩流動
entrance n. 入口
enter v. 進入
come into effect 生效，起作用
merge 混合，融入；沒入；合并
parabolic a. 拋物形[型]（的）
fully developed flow 充分發展流動
from a practical point of view 從一個實用的觀點看
pressure drop 壓降
radial distance 徑向距離
volumetric flow rate 體積流量
logarithmic overlap law 對數重迭律
wall layer 近壁層
outer layer 外層
overlap layer 重疊層
Kármán constant 卡門常數
Power Law Velocity Profile 指數律速度剖面
exponent 指數，冪
6.5 Experiments in Gasdynamics
apparatus 儀器
take note of 注意
the high-pressure gas supply line 高壓氣供應線
a manually operated valve 手動操作閥
converging-diverging nozzle 收縮—擴張噴管
upstream stagnation pressure 上游滯止壓強
choke at the throat 喉部壅塞
static pressure ports 靜壓測孔
discrepancy 偏差，誤差
shock waves 激波
Schlieren optical system 紋影儀光學系統
shock/expansion wave system 激波膨脹波系
oblique shock wave 斜激波
Prandtl-Meyer expansion fan 普朗特—梅耶爾膨脹波扇
perfect gas theory model 完全氣體理論模型
nozzle geometry 噴管幾何形狀
Rarefied Gas Flow 稀薄氣體流動
microscale flow 微尺度流動
Molecular Simulation (Monte-Carlo) (DSMC) technique 蒙特-卡羅直接分子模擬技術
statistical behaviour of gas molecules 氣體分子統計特性
7. Propulsion
predict vt. 預示，預估
　
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