由于喷头中有了导流体，避免了涡流的产生与剪切层的分离，从而大幅度地减少了喷头的能量损失。

In the presence of the flow deflector, the generating of the vortices and the separating of the shear layer are avoided thereby the energy loss of the jet nozzle is reduced considerably.

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同时，聚合物溶液经剪切后，粘度损失严重，粘弹性和建立流动阻力能力下降明显。

At the same time, after shearing, the viscosity is lost; viscoelasticity and the ability of establishing flow resistance have decreased.

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注聚泵剪切造成粘度损失4% （规定要求< 5 % ）。

VL owing to pumping shear is normal, 4% (specified value< 5%).

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