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Aerodynamic Analysis of a Guided Aerial Store

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Our customer is a premier defense establishment working for Indian Forces in developing state of the art armaments. They are engaged in precision strike capabilities by design & development of GPS/INS guidance and control kit for an air dropped store. For design of the guidance and control algorithm, aerodynamic coefficients of the store are required over the flight envelope possible during the guided flight. Even though, the semi-empirical DATCOM data-sheet was previously used for fixing store configuration, it fails to provide aerodynamic response of a maneuvering store with control surface (tail fins) deflection & orientation.

Zeus Numerix recommended high fidelity turbulent viscous CFD simulation of store as flow separation was expected at high angle of attack & large fin deflections. Zeus Numerix opted for its proprietary pre-processor (GridZTM, structured multi-block mesh), CFD solver (FlowZTM, compressible & parallel) and post-processor (ViewZTM) modules of CFDExpertTM for the simulations. The simulation matrix of 110 CFD runs was completed within weeks on in-house parallel computing server.

Illustration

Customer was provided with tabulated static & dynamic aero-dynamics coefficients. The coefficients were used by them to develop guidance & control algorithm & predict the trajectory & precision hit accuracy. Through this study our customer was able to eliminate the need of conducting costly & time consuming wind tunnel experiment from their design & development process.

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