Numerical simulation of lateral control in supersonic cross jet flow

Abstract

To investigate the effect of angle of attack and jet position on the lateral control force in the cross jet flow,the paper firstly simulated the supersonic cross jet flow by the numerical methods. The calculated longitudinal wall pressure distribution agreed well with the experimental results. Jet force amplification factor in longitudinal direction and center of interaction force were used to evaluate the actual performance of lateral control force in jet interaction. Moreover,normal interaction force accumulation coefficient was introduced to analyze how four characteristic areas on the body surface affect the lateral control force in jet interaction.The numerical results indicate that the lateral control force in jet interaction,which is equivalent to a normal force,together with a nose-down moment around center of jet,are not equal to the jet force in design. The wake zone of low pressure is a determinant factor affecting the actual performance of lateral control force. As the angle of attack increases,the strength of the interaction pressure in the wake zone decreases,which will enhance the lateral control force. With the jet location moving backward,the scope of the wake zone diminishes,which will improve the actual performance of lateral control force.