Experimental and numerical investigations of a new type of propulsion using modular umbrella-like wings

Abstract

This paper describes the experiment and simulation of a new type of propulsion that uses modular umbrella-like wings oscillating symmetrically in counterphase to generate thrust. The principle of the propulsion and movement of the modular umbrella-like wings was first developed, and the mechanism used to implement the movement of the modular wings was subsequently designed. Then a kinematic model of the propulsion mechanism was established for performance analysis. Finally, experiments and simulations were completed to study the kinematic and mechanical performances of the propulsion mechanism for different parameters. The experimental results indicate that modular umbrella-like wings oscillating symmetrically in counterphase can generate a valid driving power. Increasing the frequency can enhance the average aerodynamic force in one cycle. The numerical results indicate that the wings would achieve a relatively high performance at a lower reciprocating speed. We can obtain a bigger aerodynamic force by increasing the extent of the generatrix of umbrella-like wing. These results can provide theoretical and practical guidance on making a medium-sized prototype and optimizing the structure design.