核反应堆热工分析 (18).pdf

Multiphase Flow&Interface Phenomena Laboratory,School of Energy&Power Engineering,Chongqing University考虑轴向功率分布的棒状燃料元件的温度场Multiphase Flow&Interface Phenomena Laboratory,School of Energy&Power Engineering,Chongqing University把坐标z处的冷却剂的比焓用hf(z)表示，温度用Tf(z)表示，冷却剂从堆芯进口到位置z处的输热量为：则：而：若：所以：得到：()()()()pffpffQ zmcTzA V cTzm hz,()()ff inQ zhzhm,()()ff inpQ zTzTmc2()()RzLQ zq z dz()(0)coseRzq zqL2(0)()(0)cos=sinsin2eReeezRRLRRRqLzzLQ zqdzLLL,(0)()+sinsin2eeeRRff inpRRLLqzTzTmcLL沿燃料元件轴向冷却剂的焓场和温度场Multiphase Flow&Interface Phenomena Laboratory,School of Energy&Power Engineering,Chongqing University以z=LR/2 代入上式，则得冷却剂的出口温度Tf,ex移项得则所以有,2(0)=+sin22eeRRRf exff inpRLLLqTTTmcL,in2(0)sin2eeRRff exfpRLLqTTTmcL(0)sin22eeRfRpRLTLqmcL,(0)()+sin2eeRfff inpRLTqzTzTmcL沿燃料元件轴向冷却剂的焓场和温度场