Based on the experimental results

the effects of pressure

mass flow rate and style of helix tubes on the flow resistance characteristics were analyzed

and the flowing characteristics of aviation kerosene at supercritical pressure flowing through a helix tube were investigated .The results show that:the variation curve of local resistance coefficient was divided into 3 parts by critical Reynolds number and pseudo-critical temperature.Below the pseudo-critical temperature and Reynolds number

the local resistance coefficient was related to Regnolds number and D/din;below the pseudo-critical temperature and above the critical Reynolds number

it was just related to D/din;above the pseudo-critical temperature

it was not only related to Regnolds number and D/din

but also to huge variation of density and viscosity.Furthermore

a relational formula was proposed to predict the coefficient of local resistance with pressure

temperature and ratio of screw diameter versus inlet diameter when hydrocarbon fuel flowed through the helix tube at supercritical pressure.