Discussion of formula selection of friction head loss in FRP pipe
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Abstract:
As fo r the calculat ion of fr ictio n head lo ss in the FRP pipe, based on the hydraulics principle, severa l fo rmulas wer e compar ed and the rationalit y of H azen2Williams formula w as demonstrated, and the r elevant parameters w ere modified. T he study adopted differ ent formulas t o calculate the water head loss in the case o f small2tr ough inverted siphon in Xinjiang. The re2 sults o f the com par ison betw een the calculated and observ ed head loss sug gested that: ( 1) H azen2Williams formula can be used in the fr ictio n head loss calculatio n in the FRP pipe w ith diameter less than 2 000 mm, and the fr ictio nal coefficient needs to be modified; and ( 2) the combinat ion of JiEn fo rmula and Darcy fo rmula can be used in the friction head loss calculat ion in the FRP pipe w ith diameter larg er than 2 000 mm.
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