流管模型 meaning in English

stream tube model

The design of the pick - up tube accords to the research on the roto - jet pump by other people in china and a new type model is designed
集流管的设计参照了目前国内对集流管的研究并提出了一种改进型的集流管模型。
At first an analysis of the basic principles of the vertical - axis variable - pitch turbine is given including two methods to calculate the induced velocity . one is the three different streamtube - methods which are single - disk single - streamtube ( sdst ) , double - disk single - streamtube ( ddst ) and multi - streamtube ( mtt ) method based on the momentum theory , the other is the vortex method ( vtth ) based on the potential eddy theory
一是根据动量定理的流管模型得到的求解诱导速度的单盘面?单流管方法( sdst ) 、双盘面?单流管( ddst )方法、多流管( mtt )方法；二是根据势涡理论得到的求解诱导速度的的涡方法( vtth ) 。