Simulation Study on the Heating Characteristics of Ni-Cr Energy Convertor under Capacitive Discharge

Abstract

Energy convertort is an important ignition component of micro-thrust system, and its heating characteristics under electric excitation are its important technical indicators, which significantly affect the ignition reliability of the energy convertort. To clarify the influence of input electrical energy and structural parameters on the heating characteristics of the energy convertort, the heating characteristics of the Ni-Cr energy convertort under capacitive discharge were studied through simulation methods, and the following conclusions were obtained: the peak temperature of the energy convertort increases exponentially with the capacitance and voltage values. As the length and width of the bridge area increase, the peak temperature decreases exponentially. When there is a V-shaped angle in the bridge area, the peak temperature increases as the V-shaped angle decreases (180 ° -60 °). The substrate thermal conductivity controls the heat transfer of the energy convertort. As the substrate thermal conductivity increases, the peak temperature decreases. It provides important design references for the design of igniters in micro thrust systems .