Two-phase factional pressure drop of gas-non-Newtonian liquid flow through helical coils in vertical orientation

摘要

Investigations have been carried out to evaluate the two-phase frictional pressure drop for gas-non-Newtonian liquid flow through helical coils in vertical orientation.The experiments performed using nine coils and four different non-Newtonian liquids.The effects of gas and liquid flow rate,coil diameter,and liquid properties on two-phase frictional pressure drop have been illustrated.An attempt has been made to fit the experimental two-phase frictional pressure drop data by the Lockhart and Martinelli[R.W.Lockhert,R.C.Martinelli,Proposed correlation of data for isothermal two-phase two components flow in pipes,Chem.Eng.Prog.45(1949)39-48]correlation and the modified Lockhart-Martinelli correlation as presented by different authors.In another approach,friction factor method was adopted to correlate the experimental data by dimensional analysis.The correlation developed predicts the two-phase frictional pressure drop with acceptable statistical accuracy.