strategy 策略
Figure: Flow Classification
viscous flow in pipes 管中的粘性流
external flow 外流
Internal flow: Pipe Flows and Open Channel Flows 内流: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.)
conduit 导管,油管,线管,水道
turbulent flow 湍流流动
transitional flow 转捩流动
entrance n. 入口
enter v. 进入
come into effect 生效,起作用
merge 混合,融入;没入;合并
parabolic a. 抛物形[型](的)
fully developed flow 充分发展流动
from a practical point of view 从一个实用的观点看
pressure drop 压降
radial distance 径向距离
volumetric flow rate 体积流量
logarithmic overlap law 对数重迭律
wall layer 近壁层
outer layer 外层
overlap layer 重叠层
Kármán constant 卡门常数
Power Law Velocity Profile 指数律速度剖面
exponent 指数,幂
6.5 Experiments in Gasdynamics
apparatus 仪器
take note of 注意
the high-pressure gas supply line 高压气供应线
a manually operated valve 手动操作阀
converging-diverging nozzle 收缩—扩张喷管
upstream stagnation pressure 上游滞止压强
choke at the throat 喉部壅塞
static pressure ports 静压测孔
discrepancy 偏差,误差
shock waves 激波
Schlieren optical system 纹影仪光学系统
shock/expansion wave system 激波膨胀波系
oblique shock wave 斜激波
Prandtl-Meyer expansion fan 普朗特—梅耶尔膨胀波扇
perfect gas theory model 完全气体理论模型
nozzle geometry 喷管几何形状
Rarefied Gas Flow 稀薄气体流动
microscale flow 微尺度流动
Molecular Simulation (Monte-Carlo) (DSMC) technique 蒙特-卡罗直接分子模拟技术
statistical behaviour of gas molecules 气体分子统计特性
7. Propulsion
predict vt. 预示,预估
performance of a propeller 螺旋桨性能
fans or windmills 风扇或风车
blade element theory 叶片单元理论
hub 轮轴
axial and angular momentum 轴向动量和角动量
non-linear equation(s) 非线性方程
overall performance of the propeller 螺旋桨整体性能
secondary effect(s) 二次效应
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