DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
Aerodynamic Analysis of a Modified, Pylon-Mounted JSOW/CATM Using Multi-Grid CFD Methods.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Pagination or Media Count:
Computational Fluid Dynamics CFD has become a major tool in aerodynamic analysis throughout the aerospace industries, complementary to traditional methods such as wind tunnel testing, and analytical calculations. In this research, an attempt was made to integrate the Similarity and Area Rules with CFD methods. Both tools, the SimilarityArea Rule and CFD are used to derive the characteristics of complicated aerodynamic shapes in the transonic Mach number regime. It was found that the Similarity Rule can only be verified qualitatively. On the other hand, the Area Rule can be more completely verified. The aim was to find ways to minimize the drag of the tralifrig configurations of the Arr-to-Ground AG weapon, Joint-Standoff-Weapon GSOQ, in its Captive-Air-Training-Missile CAm4 configuration. By analyzing the combination of CAmI and Pylon, it was found that the drag of this configuration depends on the average slope of the area cross-section distribution of the afterbody. The CFD tools used were a state-of-the-art grid generation code, GRIDGEN, and a multi-grid integration code, PEGSUS the configurations were run with the OVERFLOW solver using Euler, as well as Navier-Stokes solutions. For drag optimization, Euler solutions give adequate results, the need for NS solution can be restricted to more intensity viscous analysis.
APPROVED FOR PUBLIC RELEASE