**Software**

**Doublet Lattice based Unsteady Aerodynamics Analysis**

This code uses 3 doublets for approximating the doublet distribution across each panel via a parabolic approximation. It is capable of solving for any 3-D surface which has a thin airfoil assumption. Also, the code is capable of carrying out the Rogerâ€™s approximation which fits frequency response from the DLM to a transfer function in a least squares manner. To ensure that the results at zero oscillating frequency i.e. steady state, match the standard Vortex Lattice method (VLM), the code subtracts out the steady flow solution from the results of all unsteady computations. Then, results from a VLM code, which has also been developed from the basics, is added in. Except for the script for gridding, all the other components of the code are general and can be used for any 3-D lifting surface.

**Graduate Student**: Aditya Kotikalpudi