Large errors are usually observed when Chisholm model is used in V-cone flowmeter to measure stratified gas-liquid flow rate. Three V-cone flowmeters with throttle ratios of 0.55

0.65 and 0.75 were used to study stratified gas-liquid flow at gas volume fraction of more than 95%. The effects of gas and liquid flow rates

operating pressure and throttle ratio on correction factor C of the Chisholm model were analyzed and new model for measuring stratified gas-liquid flow was developed. Correction factor C was monotonically decreased with increase of Lockhart-Martinelli

XLM

but was hardly affected by pressure and the gas densiometric Froude number. However

C was somehow affected by throttle ratio. The relationship between C and XLM was obtained and new models for three V-cone flowmeters to measure stratified flow were developed. The relative standard error of the predicted gas flow rate was with ±3.0% for V-cone flowmeters with throttle ratios of 0.55 and 0.65 under confidence level of 94.6% and 88.6%

respectively

while that was with ±4.0% under 91.7% confidence level for V-cone flowmeter with throttle ratio of 0.75.