1) hydraulic efficiency conversion
水力效率换算
1.
The method of increasing vortex loss while decreasing friction loss is discussed,and a new hydraulic efficiency conversion method for prototype-model water pumps based on the Prandtl-Colebrook formula,which has a wide range of Reynolds numbers and good accordance with Nikuradse s.
分析模型试验雷诺数范围及布拉修斯公式的适用性,研究莫迪系列公式中原型与模型尺寸比指数、摩擦损失和旋涡损失比例,对采用增加旋涡损失的同时减小摩擦损失的处理方法进行了探讨;提出了基于雷诺数适应范围大、与尼古拉兹实验符合性好的Prandtl-Colebrook摩擦因数公式进行原型与模型水力效率换算的新方法,并与新发展的莫迪公式、IEC60995—1991《考虑比尺效应的水力机械模型验收试验确定其原型性能》方法、JIS B 8327—2002《利用模型泵测试泵性能的试验方法》进行了计算比较,表明所提出的新方法具有理论性强、计算方法简单、计算精度高的优点,可以作为水力机械原型与模型水力效率换算的新方法。
2) Conversion methods of coefficient for efficiency
效率换算
3) hydraulic efficiency
水力效率
1.
Computational fluid dynamics (CFD) technique was used to simulate the hydraulic efficiency of the ozone contactor in a water treatment plant, Shenzhen and to optimize the ozonation system by calculating retention time distribution of fluid.
利用计算流体力学(CFD)技术,通过计算流体的停留时间分布,模拟了深圳某水厂臭氧接触池的水力效率,对臭氧接触系统进行了优化。
2.
Pilot-scale modeling computational fluid dynamics (CFD) was conducted to determine the feasibility in the use of CFD for calculating hydraulic efficiency of clearwell, and both the retention time distribution function and accumulated distribution function were obtained in mathematic model of the clearwell.
为确定计算流体力学(CFD)用于清水池水力效率计算的可行性而建立了CFD中试模型,得到了清水池数学模型的液龄分布函数和累计液龄分布函数。
3.
Taking bedload sampler MB-II as an example,applying boundary layer theory to calculate the comparative area loss caused by boundary layer in field and in model,it is clarified that the hydraulic efficiency measured in scaled model test is less than that in field.
以MB-II型推移质采样器为例,应用边界层理论,通过计算天然状态及模型率定时采样器出口断面处由边界层引起的相对面积损失,阐明模型试验测得的水力效率较原型偏小的原因。
4) step formula, scale effect formula,reduction formula
效率换算公式
5) pump hydraulic efficiency
泵水力效率
6) hydrodynamic efficiency
水动力效率
补充资料：泵水力效率
分子式：
CAS号：
性质：泵的扬程与理论扬程之比。衡量泵对流过它的液流阻力大小的指标。ηh=H/HT，式中，ηh为水力效率，%；H为扬程，m；HT为理论扬程(扬程与流体在泵内各种损失之和)，m。
CAS号：
性质：泵的扬程与理论扬程之比。衡量泵对流过它的液流阻力大小的指标。ηh=H/HT，式中，ηh为水力效率，%；H为扬程，m；HT为理论扬程(扬程与流体在泵内各种损失之和)，m。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条