In this article, a 1D turbine airflow model was developed in order to estimate the aerodynamic force exerted by the exhaust gas flow on the VGT vanes. The model was discretized in order to facilitate its implementation, and numerical approximation of its partial derivatives was also discussed. Then, the aerodynamic force was estimated on the VGT vanes and transferred to the actuator shaft, in order to obtain its influence on the actuator. Pressure losses in the turbine caused by its geometry are also considered. The model was used to develop a simulation tool for prediction of the aerodynamic force as well as the internal mass-flow states of the turbine. Experimental validation with pressure losses shows that the tool predicts the aerodynamic force accurately. experimental results.