Numerical simulation of airflow effect on moving body under laser irradiation

The flow field outside a moving object with high velocity has much influence on the object’s temperature and stress distribution under laser irradiation. The thermo-fluid-mechanical coupling of a moving cylinder with a subsonic velocity is considered, and the temperature and stress field are obtained using finite element method. It is found that there is a high temperature gradient at the region of the heat source. The stress of the material reaches the yielding limit quickly due to the high temperature, and high residual stresses occur in the material. At the inner surface of the cylinder the stress component is compressive at first, and then becomes tensile gradually due to the temperature rise outside the cylinder. Because of the airflow pressure the stress distribution was not symmet