s理想气体pipeflow管流Pitot-statictube皮托—静压管Pitottube皮托管planeflow平面流动planejet平面射流pointofinflextion拐点pointoftransition过渡点potentionalenergy势能Potentialflow势流power功率Prandtlmixinglength普朗特混合长度Prandtlnumber普朗特数pressuredifferential压差pressuredrag压差阻力pressurefield压强场pressureforce压力pressuregage压强计pressuregradient压强梯度pressurehead压强水头pressurewave压力波Qquantummechanics量子力学quasi-staticprocess准静态过程quasi-steadytheory准定常理论Rradialvelocity经向速度ratioofspecificheats比热比realfluid粘性流体realgas真实气体,实际气体rectangularcoordinatesystem直角坐标系reducedNavier-Stokesequation简化纳维—斯托克斯方程Reynoldsnumber雷诺数resonance共振Reynoldsstress雷诺应力rotationvelocity旋转速度rotationalflow有旋流动rough-pipezoneofflow流动的光滑管区roughness粗糙度Ssamemassflow均质流secondaryflow二次流流动separationpoint分离点sharp-crestedweir尖顶堰shearstress剪切力sheardeformation剪切变形shockwave激波similarity相似性sink汇
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