单流管 meaning in Chinese

dead leg

Then , four different computation methods are applied to compute the hydrodynamic performance of the rotor , which are single - disk single - tube method ( sdst ) , double - disk single - tube method ( ddst ) , multi - tube method ( mtt ) that are based on momentum theorem and vortex method ( vtth ) that is based on potential eddy theory
然后，采用基于动量定理的单盘面?单流管方法( sdst ) 、双盘面?单流管( ddst )方法、多流管( mtt )方法以及基于势涡理论的涡方法( vtth )计算直叶摆线式水轮机的水动力性能。
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 ) 。