Open-end tube dynamic flow model with an oscillatory extortion

Abstract

Abstract. This paper presents a derivation of dynamic 2d mathematical model for open end tube with oscillatory extortion in the region of the closed end. The aim the research is to investigate possible uses of the increased pressure in the enclosed tube chamber, especially for energy efficient lift generation. The mathematical model allows to test and predict how flow modifications impact the resultant lifting force. A derivation of the proposed mathematical model is shown. The mathematical model is then compared to the computational fluid dynamics discrete model. The results prove the accuracy of the mathematical physical model.

Low Reynolds Number Rotor Blade Aerodynamic Analysis

“…One way of reducing the power required for flight is to increase forward velocity. By doing this the mass flow of air passing through the disk is increased while the induced velocity is not [1]. A good analysis of helicopter in forward flight can be found here [2].…”