An experimental study of mass transfer rate from the simple levels of water surface for forced and mixed convection regimes

This study has mainly focused on derivation of aerodynamic data for an airship in particular conditions especially at high angles of attack. When such data are inserted into a flight simulator as a closed loop, it is vital to make use of special computational means and methods, so that the ability to send and receive flight conditions would be achieved through an “in-the-loop” manner. Therefore, using an open source environment such as OpenFOAM is suggested in this regard. Through this study, the aerodynamic coefficients of the airship are calculated by three different CFD approaches and empirical data collected from wind-tunnel tests while geometrical parameters were set for angles of attack between -10 to 20 degrees. In order to achieve aerodynamic goals, air simulation is of great importance. So, the aerodynamic results are compared based on the three methods of calculating fluid "computing" in the loop, the wind tunnel test and the analytical method of the geometric parameters of the ship's aircraft. In this study, the stability of the aircraft, the longitudinal and lateral aspects of the aircraft is examined. Also, by examining the ratio of the coefficients of the lift to the drag, based on the angle of attack, the angle of attack that the aircraft has the best performance is determined.