In the recent past National Science and Technological Laboratory (NSTL) has taken up work in Naval CFD for high-speed submerged vehicle and weapon applications. In this paper a problem handled at NSTL using CFD tools in conjunction with the model tests on some cases of submerged body propulsor design will be described and the advantages of such a method will be highlighted. A code developed by National Aerospace Laboratories (NAL) using constant source and doublet distributions, has been used for the analysis and the results have been compared with model tests carried out in the High Speed Towing Tank (HSTT) at NSTL.