Method for obtaining hot spot forming time in solid rocket engine roasting process

The invention discloses a method for obtaining hot spot forming time in the roasting process of a solid rocket engine. The method comprises the steps of setting thermal boundary conditions and material attributes, writing a user-defined program for calculating chemical reaction heat release, calculating reaction heat of a propellant at all positions of all time steps in the baking process in combination with CFD software, and obtaining the temperature and heat transfer heat flow values of all positions of all time steps; extracting temperature parameters at each position one second before explosion, defining the highest temperature point position as a hot spot position, extracting two time points when the heat transfer heat flow at the hot spot position changes from a positive value to a negative value, and calculating the time point when the heat transfer heat flow changes from the positive value to zero by using a linear interpolation method as a hot spot forming time point. According to the method for obta