Optimal shape design of an airship based on geometrical aerodynamic parameters

Abstract Background Conventional airship mathematical modeling usually involves six coupled degrees of freedom and two inputs, namely tail thrust. The current study focuses on aerodynamic modeling. model is developed in 3D-space based plane semi-empirical a symmetric airship. depends the main geometrical parameters introduces an optimal shape design objective function established to reduce drag effect side flow increases both lift force pitching moment. Three types construction are investigated, NPL, GNVR, Wang. Results MATLAB genetic algorithm toolbox used obtain shape. population size 50 number generations also for GNVR Wang shapes at each corresponding angle attack $$(\alpha =\left[ -20^\circ ,20^\circ \right] )$$ ( α = - 20 ∘ , ) side-slip $$(\beta β . compared select best fit within operating range. To get shape, weighted averaging performed solution. Conclusion geometric technique method generate optimum presence with utilized that reduces