The type selection experiment of drag reduction polymer materials at high Reynolds number (up to 2.2× 10

7

) is carried out by using the method of measuring torque on the rotating disc and rotating cylinder in water tank. Taking poly(ethylene oxide) (PEO)

polyacrylamide (PAM) and guar gum

which are widely used in drag reduction at present

as experimental objects

the effects of concentration

relative molecular mass

mixing with other polymers

shearing and seawater on drag reduction were studied. The main conclusions are as follows: (1) the drag reduction rate generally increases with the increase of concentration. As far as PEO(

M

n

=1×10

7

) is concerned

the concentration of 5 mg/L is saturated at low Reynolds number (

Re

<

1×10

7

)

and the maximum drag reduction rate is about 60%. (2) The drag reduction rate generally increases with the increase of relative molecular mass. When

Re

<

1.3×10

7

the drag reduction rate is basically unchanged when the relative molecular mass is greater than 8×10

6

. (3) The ability to resist shearing increases with the increases of concentration and relative molecular mass

but the increase decreases when the concentration

>

5 mg/L and relative molecular mass

>

8×10

6

. (4) Increasing the concentration or mixing PAM can improve the drag reduction rate and the ability to resist shearing

and the former has better effect. (5) The drag reduction rate in seawater is equivalent to that in fresh water

but the ability to resist shearing in seawater is slightly poor.