Digital Wind Tunnel (DWT) is being developed in a project entitled Digital/Analog Hybrid Wind Tunnel in JAXA. The main objective of this project is to sophisticate the transonic wind tunnel in JAXA by applying IT technologies. We have several hurdles to establish DWT such as the developments of an automatic grid generation tool and a high performance CFD solver. In this paper, the prediction accuracy of aircraft loads by using the automatic grid generation tool and the modeling of porous wall for the CFD calculations of whole wind tunnel including an aircraft model, support instruments, and walls are discussed.
