Numerical Calculation of Added Mass of Stratospheric Airship with X-Shaped Tail

Abstract

For solving added mass of stratospheric airship, take the method of planar motion mechanism numerical simulation, calculate main diagonal added mass of standard ellipsoid model, and then calculate main diagonal added mass and other coupling added mass of stratospheric airship with X-shaped tail. Error between calculated value and theoretical value is 2.94%~4.29%, that validates the method is feasible and effective; stratospheric airship added mass is expressed by matrix. Comparison with wind tunnel test, the calculation error of stratospheric airship with X-shaped tail added mass λ55 and λ66 are -25.8% and -19.7%. The result shows that the method of planar motion mechanism numerical simulation can solve added mass matrix of arbitrary shape stratospheric airship, not just main diagonal added mass; Compared with the added mass on the main diagonal, the coupling added mass at other positions is small.