基于Fluent研究弯度对翼型动力特性的影响

he dynamical performance of the airfoil mainly includes the lift force and the drag force. First of all, some basic theory is introduced, as well as the influence of the geometric characteristics on the dynamical performance, and then a new model is designed by Gambit referring to an actual model, and the isolated airfoil is put into a fluid field and numerically simulated by Fluent, and finally the influence of the isolated airfoil’s camber on the dynamical performance. The result shows, the coefficients curve of lifting force and the dragging force accords with the common rule of the dynamical characteristics. The working attack-angle of the designed airfoil is between -1 degree and 10 degree under the positive working condition, and as well as it is under the negative working condition. Whether it is under the positive working condition or not, no matter how much the attack angle is, the coefficient of the lifting force along with the changed camber is getting bigger and bigger, and the relationship of them is nearly linear, the increments of the changed coefficient gets smaller when the attack angle gets bigger. And when the central angle of the midline is 4 degree, the ratio of the lifting force to the dragging force is achieved the maximum, and the corresponding best attack angle is 2 degree. Therefore, the best performance is achieved when the camber is small and as well as the attack angle.