Thermal Stress Induced by Inclined Impinging Heating Jet on a Flat Plate

The thermal stresses developed on a flat plate, due to an impinging heating slot jet, and their variation with jet inclination is studied. The measured temperature data are used as input for thermal stress modeling, using the sequential coupling finite element method (FEM) for fixed separation distance and Reynolds number, and selected jet inclination angles. Thermal stresses are calculated for various inclination angles and physical boundary conditions of the plate for a given set of thermal boundary conditions. The sequential coupling FEM is adopted to calculate the thermal stresses induced on a flat plate as a result of an impinging heating or cooling jet. Compressive stress is induced in the plate under the impinging heating jet. The lateral distribution of the stress is symmetric for the normal impingement. The study reveals that as the inclination angle is decreased, the stress at all lateral points, including the point at which the stress is maximized, is shifted systematically upward.