A Power-Augmented Ram Wing In Ground (PAR-WIG) is a wing in ground effect, whose lift is enhanced by using the airflow of a thruster, which is placed in the upstream of the wing, so as to create a high ram pressure region under the wing. In this study, through a NS solver based on a finite-volume method, a flowfield around a two-dimensional wing in ground effect is computed. Relations between a ram pressure and a height from ground to the wing are considered. Next, by soving a flowfield around a two-dimensional PAR-WIG, the PAR effect is mentioned.