earticle

영어

Aiming at the problem of the large error between the pressure gradient of multiphase flow predicted by the model presented in literature [12] (denoted by Liao model) and the experimental pressure gradient, this paper firstly compares the error between the Liao model and the experimental data, and builds a correlation model (denoted by CM model) between error of the Liao model and gas liquid ratio according to the close relations between the two. And then combining the CM model and the Liao model, a new predicting method of pressure gradient which is denoted by LCM model is built, and the algorithm is given. Finally, this paper gives the numerical experiment results for ninety groups of experimental data. The numerical results show that the average relative error of LCM model is about 3.3% and the one of Liao model is about 38%. Based on the known data with 30% water content and with 90% water content, this paper uses LCM model to calculate the pressure gradient under the case of 60% water content and compares the LCM gradient with the experimental pressure gradient under the same condition. The average relative error of LCM model is 10.44%, but the one of Liao model is 41.54%. The results shows that the LCM model proposed in this paper improves the predicting precision of pressure gradient for multiphase flowing in a certain range.