The quantitative equation between Equilibrium Delta Temperature （ AT ） and Thermal Time Constant （ r ） is derived based on the fuel tank heat balance equation in this paper. The method based on the quantitative equation betweenaTandr for calculating the fuel tank ther- mal data is presented. Furthermore, two kinds of methods for obtaining the fuel bulk temperature are also presented in this paper： Fuel Tank Thermal Model Method and Fuel System Thermal Flight Test Method.%燃油箱热参数是飞机燃油箱可燃性定量分析的关键输入参数之一。依据燃油箱热量平衡方程，推导得出了燃油箱两个热参数平衡温差与热时间常数的定量关系式。基于该关系式，给出了燃油箱热参数的计算方法。此外，还介绍了燃油平均温度的两种获取方法：燃油箱热模型方法和燃油系统热特性飞行试验方法。
展开▼
